[californiadisasters] File - California Disasters DISCUSSION GROUP

Extended discussion threads, chit-chat with other group members or slightly off-topic messages should be posted to the California Disasters DISCUSSION group, which can be found here:
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All members are urged to join this sister-group and use it to post messages that are not relevant to the purpose of the main list.

Thank you,
Moderator


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[californiadisasters] File - Too Many Messages?

This group frequently has a HIGH MESSAGE VOLUME during major incidents.

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[californiadisasters] File - Abbreviations & Meanings

Here is a list of internet abreviations and their meanings which will help you to better understand what others are saying and will give you some abreviated options for commonly used expressions and terms.

AAR At any rate
AAR can also mean "After Action Report", used in emergency management fields
AAS Alive and smiling
ADN Any day now
AEAP As early as possible
AFAIK As far as I know
AFK Away from keyboard
AISB As it should be
AOTA All of the above
ASAP As soon as possible
AWOL Absent Without Leave
B4 Before
B4N Bye for now
BAK Back at keyboard
BAU Business as usual
BBIAF Be back in a few
BBIAM Be back in a minute
BBL Be back later
BC Because or variously, Battalion Chief
BCNU Be seein' you
BFN Bye for now
BOL Best of luck
BRB Be right back
BTA But then again
BTW By the way
CHAOS Chief Has Arrived On Scene
CMIIW Correct me if I'm wrong
CMON Come one
CT CalTrans (California Department of Transportation)
CU See you
CUA See you around
CUL See you later
CUL8R See you later
CWYL Chat with you later
CYO See you online
DC Division Chief
DEGT Don't even go there
DIKU Do I know you?
DQMOT Don't quote me on this
DTS Don't think so
EM Emergency Management
EMA E-mail address
EOM End of message
F2F Face to face
FISH First in, still here
FAMCL Falling of my chair laughing
FC Fire Captain
FD Fire Department
FITB Fill in the blank
FM Fire Marshall
FUBAR Fudged Up Beyond All Recognition
FWIW For what it's worth
FYI For your information
GA Go ahead
GAL Get a life
GB Goodbye
GFI Go for it
GG Gotta Go
GIAR Give it a rest
GMTA Great minds think alike
GOL Giggling out loud
GR&D Grinning, running and ducking
GTRM Going to read mail
HAGN Have a good night
HAGO Have a good one
HHIS Head hanging in shame
HRU How are you?
HTH Hope this helps
IAC In any case
IAP Incident Action Plan
IB I'm back
IC I see, or variously Incident Command
ICP Incident Command Post
ICBW It could be worse
ICS Incident Command System
ICT Incident Command Team (CALFIRE term)
IDK I don't know
IDTS I don't think so
IIRC If I remember correctly
ILU I love you
ILY I love you
IM Instant message
IMHO In my humble opinion
IMNSHO In my not so humble opinion
IMO In my opinion
IMT Incident Management Team (USFS term)
INAL I'm not a lawyer
IOW In other words
IRMC I rest my case
ITA I totally agree
IUSS If you say so
IYKWIM If you know what I mean
IYO In your opinion
IYSS If you say so
JAC Just a sec
JIK Just in case
JJA Just joking around
JK Just kidding
KOTC Kiss on the cheek
KNIM Know what I mean?
L8R Later
LD Later, dude
LE Law Enforcement
LEO Law Enforcement Officer
LMAO Laughing my a** off
LOL Laughing out loud
LTM Laugh to myself
LTNS Long time no see
MorF Male or female?
MUSM Miss you so much
NBD No big deal
NIMBY Not in my back yard
NMH Not much here
NOYB None of your business
NN Night-Night
NP No problem
NRN No response necessary
NW No way
OIC Oh, I see
OEM Office Of Emergency Management
OES Office of Emergency Services
OMG Oh my God
OO Over and out
OOTD One of these days
OTOH On the other hand
OTTOMH Off the top of my head
PD Police Department
PDQ Pretty darn quick
PLMK Please let me know
PIMP Peeing in my pants
PMFI Pardon me for interrupting
PMFJI Pardon me for jumping in
POAHF Put on a happy face
PTL Praise the Lord
PXT Please explain that
PU That stinks!
RL Real life
RME Rolling my eyes
ROTFL Rolling on the floor laughing
RSN Real soon now
SMHID Scratching my head in disbelief
SNAFU Situation Normal ~ All Fudged Up
SO Sheriff's Office
SOMY Sick of me yet?
SOS Same Old Shtuff
SOTMG Short of time, must go
SPST Same place, same time
SSDD Same stuff, different day
ST or S/T Strike Team
STW Search the Web
SUITM See you in the morning
SUL See you later
SUP What's up?
SYL See you later
TAFN That's all for now
TAM Tomorrow a.m.
TC Take care
THX Thanks
TIA Thanks in advance
TLK2UL8R Talk to you later
TMI Too much information
TMWFI Take my word for it
TPM Tomorrow p.m.
TPTB The powers that be
TSDMF Tears streaming down my face
TTFN Ta ta for now
TTTT These things take time
TTYL Talk to you later
TTYS Talk to you soon
TU Thank you
TY Thank you
TYT Take your time
TYVM Thank you very much
UGTBK You've got to be kidding
UW You're welcome
WAM Wait a minute
WAYF Where are you from?
WB Welcome back
WIIFM What's in it for me?
WTC World Trade Center
WTG Way to go
WTH What the heck?
WTSHTF When the s*** hits the fan
WU? What's up?
WUF? Where are you from?
WWJD What would Jesus do?
WWYC Write when you can
WYSIWYG What you see is what you get
YBS You'll be sorry
YGBKM You gotta be kidding me
YW You're welcome


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[californiadisasters] On This Date In California Weather History (May 31)

2004: Chula Vista reached an afternoon high temperature of 76° F.

It was unremarkable, except that it was the highest temperature on record for this date
and, strangely, the city's lowest record high temperature for any day in May.

2001: Death Valley National Park recorded a high temperature of 118° F, setting a daily record.

2001: Fresno reached 106° F, marking the 9th time this month the high reached into the triple digits.
This set a record for the most triple digit high temperatures in May.

2001: It was 93° F in Idyllwild, the highest temperature on record for May.
This also occurred on 5.29.1984.
It was 91° F in Palomar Mountain, the highest temperature on record for May.
This also occurred on 5.28.2003.

2001: San Jose reported a high temperature of 101° F.

1998: Fresno reached a high of only 85° F and in Bakersfield the high reached 84° F.

This was the warmest reading of the month at both locations and only the 3rd May on record in both cities that the high temperature never cracked 90° (also occurred in May 1917 and 1961).

1991: Cuyamaca reported an overnight low of 20° F, the lowest temperature on record for May, amazingly on the last day of the month.

1987: The Morse Wildfire burned 166 acres and destroyed 31 homes near Pebble Beach.

1981: The overnight low in Newport Beach was 68° F, the highest low temperature on record for May (the average high temperature is 66° F).

1971: 8" of snow fell at Glenbrook (east shore Lake Tahoe), its all-time record one-day total for May.

1967: 8" of snow fell at Sierraville.

1961: Virginia City, NV, recorded 1.9" of precipitation.

1910: Earliest 110° F high temperatures on record at Fresno and Bakersfield.
Also the highest temperatures ever recorded at both locations for May.

In Lemon Cove, the high reached a sweltering 118° F, the highest on record here in May.

1910: The high temperature in Elsinore soared to 109° F, the record for May.

Source: NWS San Francisco/Monterey, Hanford, Reno, Las Vegas, & San Diego

--

Kim Noyes about.me/kim.noyes

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Posted by: Kim Noyes <kimnoyes@gmail.com>

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[californiadisasters] On This Date In California Weather History (May 30)

2002: Thunderstorms dropped 1.01" of rain at the Hanford Airport in just 21 minutes in the afternoon resulting in street flooding in the city.
In just an hour, some 260 lightning strikes were recorded in the central and southern San Joaquin Valley.

2001: Ben Lomond had a high temperature of 105° F.

1991: A strong storm system moving through Utah and Nevada induced very strong winds in the
Coachella Valley.

Wind gusts of 60 to 70 mph were reported in the area.
The winds kicked up dust and sand and knocked out power to 5,000 people.

One fatality occurred when a semitrailer was blown over crushing a pickup truck, with its unfortunate occupant still inside.

1991: Strong wind gusts, measured at 73 mph at McCarran Airport, blasted Las Vegas, NV, darkening 100,000 customers, tore down 150 power poles, blew a large rocket sign down at the Vegas World Casino and tore the tips off of turrets on the Excalibur.

Trees fell valley-wide and several cars were crushed by them including three cars in Summerlin, NV, that were hit by an overturned truck carrying carpeting.

The peak wind speed of 73 mph in Las Vegas set the highest reading recorded in May. 

1991: China Lake NAS clocked an 89 mph gust from the west, tied for the highest on record here (also had an 89 mph gust on January 14, 1950).

1984: Remarkably, on the same day of the highest maximum and minimum temperatures
(112° and 79°), Borrego Springs also recorded its record rainfall for this day (0.15 inch).
A weak tornado hit a golf course in San Dimas.
Minor damage occurred with about a dozen trees uprooted.

1984: Intense winds, gusting as high as 60 mph, blew across Kern County shattering windows, knocking air conditioning units off roofs and toppling trees.
A number of utility poles also were knocked down, some which were leveled by "a wall of wind and dust".
On this same date, Fresno only dropped to 76° F for low, making it the warmest minimum temperature on record for the month of May.

1983: Very heavy rain caused a mudslide on Slide Mountain (NV side of Lake Tahoe - north side of lake).
The resulting debris flow that was sent down Ophir Creek forced the closure of U.S. Highway 395.

1918: It was 32° F in Victorville, the latest date in the season with a freezing temperature on record.

1910: A heat wave sent the mercury soaring in the Coachella Valley.

Indio reached 121°, a record for May.

Source: NWS San Francisco/Monterey, Hanford, Reno, Las Vegas, & San Diego

--

Kim Noyes about.me/kim.noyes

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Posted by: Kim Noyes <kimnoyes@gmail.com>

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[ Volcano ] Smithsonian / USGS Weekly Volcanic Activity Report 23-29 May 2018

***************************************************************************************************************

Smithsonian / USGS Weekly Volcanic Activity Report 23-29 May 2018 　

***************************************************************************************************************

　

Sally Kuhn Sennert - Weekly Report Editor (kuhns@si.edu)

URL:　http://volcano.si.edu/reports_weekly.cfm

　

　

New Activity/Unrest: Kilauea, Hawaiian Islands (USA)　 | Klyuchevskoy, Central Kamchatka (Russia)　 | Merapi, Central Java (Indonesia)　 | Piton de la Fournaise, Reunion Island (France)

　

Ongoing Activity: Agung, Bali (Indonesia)　 | Aira, Kyushu (Japan)　 | Ambae, Vanuatu　 | Dukono, Halmahera (Indonesia)　 | Karymsky, Eastern Kamchatka (Russia)　 | Langila, New Britain (Papua New Guinea)　 | Mayon, Luzon (Philippines)　 | Reventador, Ecuador　 | Sabancaya, Peru　 | Sheveluch, Central Kamchatka (Russia)　 | Turrialba, Costa Rica

　

　

The Weekly Volcanic Activity Report is a cooperative project between the Smithsonian's Global Volcanism Program and the US Geological Survey's Volcano Hazards Program. Updated by 2300 UTC every Wednesday, notices of volcanic activity posted on these pages are preliminary and subject to change as events are studied in more detail. This is not a comprehensive list of all of Earth's volcanoes erupting during the week, but rather a summary of activity at volcanoes that meet criteria discussed in detail in the "Criteria and Disclaimers" section. Carefully reviewed, detailed reports on various volcanoes are published monthly in the Bulletin of the Global Volcanism Network.

　

Note: Many news agencies do not archive the articles they post on the Internet, and therefore the links to some sources may not be active. To obtain information about the cited articles that are no longer available on the Internet contact the source.

　

　

　

New Activity/Unrest

　

　

Kilauea　 | Hawaiian Islands (USA)　 | 19.421°N, 155.287°W　 | Summit elev. 1222 m

　

HVO reported that the eruption at Kilauea's Lower East Rift Zone (LERZ) and at Overlook Crater within Halema`uma`u Crater continued during 23-29 May. Lava fountaining and spatter was concentrated in the middle portion of the fissure system, feeding lava flows that spread through Leilani Estates and Lanipuna Gardens subdivisions, and also traveled to the ocean.

　

Earthquakes beneath the summit and ash emissions from Overlook Crater continued as the summit area subsided and adjusted to the withdrawal of magma. Ash emissions were small and frequent, punctuated by larger plumes. The Overlook crater vent continued to widen to the W, and by 25 May the vent area was about 36 hectares. At 1244 on 25 May a M 4 earthquake was located in the summit region. That same day a new pit opened on the N part of Halema`uma`u Crater floor. Three explosions (at 0042, 0144, and 0500) on 26 May generated ash plumes that rose 3-3.3 km (10,000-10,800 ft) a.s.l. A small explosion at 0156 on 29 May sent an ash plume vertically to 4.6 km (15,000 ft) a.s.l. and drifted slightly NW. The explosion was felt by residents in Volcano, and ejected incandescent blocks within Halema`uma`u Crater. On 28 May a M 4.1 earthquake occurred at 1739 along the Koa'e fault zone, S of the caldera.

　

Lava fountains from Fissure 22 continued to form a channelized lava flow that entered the ocean NE of MacKenzie State Park, causing explosions and generating a plume of hazardous laze (lava haze, a mixture of condensed acidic steam, hydrochloric acid gas, and tiny shards of volcanic glass). On 23 May relatively tall lava fountains at fissures 6 and 13 fed another channelized flow that created a second ocean entry. Observers noted that a perched lava pond/channel was 11 m above ground level, and that methane was seen overnight that burned blue in road cracks. On 24 May lava was entering the ocean at three points between Pohoiki Bay and MacKenzie State Park, though by the next day only two were active.

　

Overnight during 25-26 May vigorous spatter was observed from a cone on Fissure 8, and multiple booming gas emissions occurred at Fissure 17. By the morning of 26 May an estimated 9.6 square kilometers had been covered by new lava. Fissures 7 and 21 fed a perched lava pond and sent flows NE; the lava-flow fronts became 'a'a. A perched pond on the W side of Fissure 7 was breached, sending short flows W. Later that day the flows turned S, and by dusk were cascading into Pawaii crater, adjacent to the W margin of the Fissure 6 flow that fed one of the ocean entries. Lava from Fissure 21 flowed onto Puna Geothermal Venture (PGV) property.

　

During 26-27 May activity at Fissure 7 increased; lava from fountains 45-60 m tall built a large, 30-m-high spatter rampart. Large cracks were observed overnight on Kupono St., near Fissure 9. Three vents active at Fissure 8 spattered and flamed, and doubled in size in one day. On 27 May lava flows from fissures 7 and 8 advanced NE on PGV property; at about 1900 a flow broke out in this area and advanced rapidly to the N and W, through the E portion of Leilani Estates, prompting several residents to evacuate. Three minor ocean entries were again active. Fissure 24 opened in Leilani Estates.

　

On 28 May the vents that fed the ocean entries stopped erupting, leading to only residual lava in the channel to occasionally enter the ocean. During 28-29 May fountains, lava flows, and spattering from multiple fissures persisted. Pele's hair from vigorous fountaining (60 m high) at Fissure 8 drifted downwind, with some strands falling in Pahoa. According to a news article, the LERZ eruption had destroyed at least 94 structures, including 53 homes, by 29 May. The flows also cut off road access to PGV, which had been evacuated.

　

Geologic Summary. Kilauea, which overlaps the E flank of the massive Mauna Loa shield volcano, has been Hawaii's most active volcano during historical time. Eruptions are prominent in Polynesian legends; written documentation extending back to only 1820 records frequent summit and flank lava flow eruptions that were interspersed with periods of long-term lava lake activity that lasted until 1924 at Halema`uma`u crater, within the summit caldera. The 3 x 5 km caldera was formed in several stages about 1500 years ago and during the 18th century; eruptions have also originated from the lengthy East and SW rift zones, which extend to the sea on both sides of the volcano. About 90% of the surface of the basaltic shield volcano is formed of lava flows less than about 1100 years old; 70% of the volcano's surface is younger than 600 years. A long-term eruption from the East rift zone that began in 1983 has produced lava flows covering more than 100 km2, destroying nearly 200 houses and adding new coastline to the island.

　

Sources: US Geological Survey Hawaiian Volcano Observatory (HVO)　https://volcanoes.usgs.gov/observatories/hvo/;

KIII-TV　https://www.kiiitv.com/article/news/nation-now/hawaii-lava-flow-destroys-12-more-homes-as-kilauea-volcano-continues-exploding/465-afd62fc3-91d2-4764-9eb9-c3dee473033d

　

　

Klyuchevskoy　 | Central Kamchatka (Russia)　 | 56.056°N, 160.642°E　 | Summit elev. 4754 m

　

KVERT reported that a thermal anomaly over Klyuchevskoy was identified in satellite images during 19-20 and 24 May. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).

　

Geologic Summary. Klyuchevskoy (also spelled Kliuchevskoi) is Kamchatka's highest and most active volcano. Since its origin about 6000 years ago, the beautifully symmetrical, 4835-m-high basaltic stratovolcano has produced frequent moderate-volume explosive and effusive eruptions without major periods of inactivity. It rises above a saddle NE of sharp-peaked Kamen volcano and lies SE of the broad Ushkovsky massif. More than 100 flank eruptions have occurred during the past roughly 3000 years, with most lateral craters and cones occurring along radial fissures between the unconfined NE-to-SE flanks of the conical volcano between 500 m and 3600 m elevation. The morphology of the 700-m-wide summit crater has been frequently modified by historical eruptions, which have been recorded since the late-17th century. Historical eruptions have originated primarily from the summit crater, but have also included numerous major explosive and effusive eruptions from flank craters.

　

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)　http://www.kscnet.ru/ivs/kvert/index_eng.php

　

　

Merapi　 | Central Java (Indonesia)　 | 7.54°S, 110.446°E　 | Summit elev. 2910 m

　

PVMBG reported that a two-minute-long phreatic eruption at Merapi which began at 1349 on 23 May was heard from the Babadan observation post. A plume was not visible due to inclement weather, though minor ashfall was reported in Ngepos post. On 24 May an event at 0256 generated an ash plume that rose 6 km above the crater rim and drifted W. Roaring was heard from all of the Merapi observation posts. A two-minute-long event at 1048 produced an ash plume that rose 1.5 km and drifted W. The Alert Level remained at 2 (on a scale of 1-4), and PVMBG noted that all people within 3 km of the summit should be evacuated.

　

Geologic Summary. Merapi, one of Indonesia's most active volcanoes, lies in one of the world's most densely populated areas and dominates the landscape immediately north of the major city of Yogyakarta. It is the youngest and southernmost of a volcanic chain extending NNW to Ungaran volcano. Growth of Old Merapi during the Pleistocene ended with major edifice collapse perhaps about 2000 years ago, leaving a large arcuate scarp cutting the eroded older Batulawang volcano. Subsequently growth of the steep-sided Young Merapi edifice, its upper part unvegetated due to frequent eruptive activity, began SW of the earlier collapse scarp. Pyroclastic flows and lahars accompanying growth and collapse of the steep-sided active summit lava dome have devastated cultivated lands on the western-to-southern flanks and caused many fatalities during historical time.

　

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)　http://vsi.esdm.go.id/

　

　

Piton de la Fournaise　 | Reunion Island (France)　 | 21.244°S, 55.708°E　 | Summit elev. 2632 m

　

OVPF reported that the eruption at Piton de la Fournaise which began on 27 April from fissures at Rivals Crater continued through 29 May. Tremor levels continued to decrease slightly, though were mostly stable at low levels. Observations on 24 May indicated flowing lava was mostly confined to tubes, though a small area of incandescence was visible at the main crater.

　

Geologic Summary. The massive Piton de la Fournaise basaltic shield volcano on the French island of Réunion in the western Indian Ocean is one of the world's most active volcanoes. Much of its more than 530,000-year history overlapped with eruptions of the deeply dissected Piton des Neiges shield volcano to the NW. Three calderas formed at about 250,000, 65,000, and less than 5000 years ago by progressive eastward slumping of the volcano. Numerous pyroclastic cones dot the floor of the calderas and their outer flanks. Most historical eruptions have originated from the summit and flanks of Dolomieu, a 400-m-high lava shield that has grown within the youngest caldera, which is 8 km wide and breached to below sea level on the eastern side. More than 150 eruptions, most of which have produced fluid basaltic lava flows, have occurred since the 17th century. Only six eruptions, in 1708, 1774, 1776, 1800, 1977, and 1986, have originated from fissures on the outer flanks of the caldera. The Piton de la Fournaise Volcano Observatory, one of several operated by the Institut de Physique du Globe de Paris, monitors this very active volcano.

　

Source: Observatoire Volcanologique du Piton de la Fournaise (OVPF)　http://www.ipgp.fr/

　

　

Ongoing Activity

　

　

Agung　 | Bali (Indonesia)　 | 8.343°S, 115.508°E　 | Summit elev. 2997 m

　

PVMBG reported that although there were some periods of foggy conditions during 23-29 May, white plumes were occasionally observed rising as high as 400 m above Agung's crater rim. At 0539 on 29 May an event generated an ash plume that rose 500 m above the crater rim and drifted SW. The Alert Level remained at 3 (on a scale of 1-4) and the exclusion zone continued at a 4-km radius.

　

Geologic Summary. Symmetrical Agung stratovolcano, Bali's highest and most sacred mountain, towers over the eastern end of the island. The volcano, whose name means "Paramount," rises above the SE caldera rim of neighboring Batur volcano, and the northern and southern flanks extend to the coast. The summit area extends 1.5 km E-W, with the high point on the W and a steep-walled 800-m-wide crater on the E. The Pawon cone is located low on the SE flank. Only a few eruptions dating back to the early 19th century have been recorded in historical time. The 1963-64 eruption, one of the largest in the 20th century, produced voluminous ashfall along with devastating pyroclastic flows and lahars that caused extensive damage and many fatalities.

　

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)　http://vsi.esdm.go.id/

　

　

Aira　 | Kyushu (Japan)　 | 31.593°N, 130.657°E　 | Summit elev. 1117 m

　

JMA reported that there were 21 events and 19 explosions at Minamidake crater (at Aira Caldera's Sakurajima volcano) during 21-28 May. Tephra was ejected as far as 1.3 km from the crater, and ash plumes rose as high as 3.2 km above the crater rim. The Alert Level remained at 3 (on a 5-level scale).

　

Geologic Summary. The Aira caldera in the northern half of Kagoshima Bay contains the post-caldera Sakurajima volcano, one of Japan's most active. Eruption of the voluminous Ito pyroclastic flow accompanied formation of the 17 x 23 km caldera about 22,000 years ago. The smaller Wakamiko caldera was formed during the early Holocene in the NE corner of the Aira caldera, along with several post-caldera cones. The construction of Sakurajima began about 13,000 years ago on the southern rim of Aira caldera and built an island that was finally joined to the Osumi Peninsula during the major explosive and effusive eruption of 1914. Activity at the Kitadake summit cone ended about 4850 years ago, after which eruptions took place at Minamidake. Frequent historical eruptions, recorded since the 8th century, have deposited ash on Kagoshima, one of Kyushu's largest cities, located across Kagoshima Bay only 8 km from the summit. The largest historical eruption took place during 1471-76.

　

Source: Japan Meteorological Agency (JMA)　http://www.jma.go.jp/jma/

　

　

Ambae　 | Vanuatu　 | 15.389°S, 167.835°E　 | Summit elev. 1496 m

　

On 18 May a news article noted that the eruption from a cone in Ambae's Lake Voui continued with minor activity at the vent. The article noted that widespread ashfall had significantly impacted food and water supplies, shelter, and the health of island residents. The Alert Level remained at 3 (on a scale of 0-5), and the report reminded residents to stay at least 3 km away from the active crater.

　

Geologic Summary. The island of Ambae, also known as Aoba, is a massive 2500 km3 basaltic shield that is the most voluminous volcano of the New Hebrides archipelago. A pronounced NE-SW-trending rift zone dotted with scoria cones gives the 16 x 38 km island an elongated form. A broad pyroclastic cone containing three crater lakes (Manaro Ngoru, Voui, and Manaro Lakua) is located at the summit within the youngest of at least two nested calderas, the largest of which is 6 km in diameter. That large central edifice is also called Manaro Voui or Lombenben volcano. Post-caldera explosive eruptions formed the summit craters about 360 years ago. A tuff cone was constructed within Lake Voui (or Vui) about 60 years later. The latest known flank eruption, about 300 years ago, destroyed the population of the Nduindui area near the western coast.

　

Source: Daily Post　http://dailypost.vu/news/ambae-volcano-eruption-continues/article_de422d00-f76f-547d-938e-28d2f22fbdb2.html

　

　

Dukono　 | Halmahera (Indonesia)　 | 1.693°N, 127.894°E　 | Summit elev. 1229 m

　

Based on analyses of satellite imagery, wind model data, and notices from PVMBG, the Darwin VAAC reported that during 23-29 May ash plumes from Dukono rose to altitudes of 1.8-2.1 km (6,000-7,000 ft) a.s.l. and drifted W, WNW, and NW. Ash plumes drifted as far as 225 km NW on 28 May.

　

Geologic Summary. Reports from this remote volcano in northernmost Halmahera are rare, but Dukono has been one of Indonesia's most active volcanoes. More-or-less continuous explosive eruptions, sometimes accompanied by lava flows, occurred from 1933 until at least the mid-1990s, when routine observations were curtailed. During a major eruption in 1550, a lava flow filled in the strait between Halmahera and the north-flank cone of Gunung Mamuya. This complex volcano presents a broad, low profile with multiple summit peaks and overlapping craters. Malupang Wariang, 1 km SW of the summit crater complex, contains a 700 x 570 m crater that has also been active during historical time.

　

Source: Darwin Volcanic Ash Advisory Centre (VAAC)　http://www.bom.gov.au/aviation/volcanic-ash/darwin-va-advisory.shtml

　

　

Karymsky　 | Eastern Kamchatka (Russia)　 | 54.049°N, 159.443°E　 | Summit elev. 1513 m

　

KVERT reported that during 19-20 May a thermal anomaly over Karymsky was identified in satellite images. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).

　

Geologic Summary. Karymsky, the most active volcano of Kamchatka's eastern volcanic zone, is a symmetrical stratovolcano constructed within a 5-km-wide caldera that formed during the early Holocene. The caldera cuts the south side of the Pleistocene Dvor volcano and is located outside the north margin of the large mid-Pleistocene Polovinka caldera, which contains the smaller Akademia Nauk and Odnoboky calderas. Most seismicity preceding Karymsky eruptions originated beneath Akademia Nauk caldera, located immediately south. The caldera enclosing Karymsky formed about 7600-7700 radiocarbon years ago; construction of the stratovolcano began about 2000 years later. The latest eruptive period began about 500 years ago, following a 2300-year quiescence. Much of the cone is mantled by lava flows less than 200 years old. Historical eruptions have been vulcanian or vulcanian-strombolian with moderate explosive activity and occasional lava flows from the summit crater.

　

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)　http://www.kscnet.ru/ivs/kvert/index_eng.php

　

　

Langila　 | New Britain (Papua New Guinea)　 | 5.525°S, 148.42°E　 | Summit elev. 1330 m

　

Based on analyses of satellite imagery and model data, the Darwin VAAC reported that during 23 and 26-28 May ash plumes from Langila rose to altitudes of 2.4-3 km (8,000-10,000 ft) a.s.l. and drifted WSW, W, and NW.

　

Geologic Summary. Langila, one of the most active volcanoes of New Britain, consists of a group of four small overlapping composite basaltic-andesitic cones on the lower eastern flank of the extinct Talawe volcano. Talawe is the highest volcano in the Cape Gloucester area of NW New Britain. A rectangular, 2.5-km-long crater is breached widely to the SE; Langila volcano was constructed NE of the breached crater of Talawe. An extensive lava field reaches the coast on the north and NE sides of Langila. Frequent mild-to-moderate explosive eruptions, sometimes accompanied by lava flows, have been recorded since the 19th century from three active craters at the summit of Langila. The youngest and smallest crater (no. 3 crater) was formed in 1960 and has a diameter of 150 m.

　

Source: Darwin Volcanic Ash Advisory Centre (VAAC)　http://www.bom.gov.au/aviation/volcanic-ash/darwin-va-advisory.shtml

　

　

Mayon　 | Luzon (Philippines)　 | 13.257°N, 123.685°E　 | Summit elev. 2462 m

　

PHIVOLCS reported that during 23-29 May white steam plumes from Mayon drifted WNW, WSW, and SW, sometimes rising 250-300 m above the crater rim. Crater incandescence was visible each night. The Alert Level remained at 2 (on a 0-5 scale) and PHIVOLCS reminded residents to stay away from the 6-km-radius Permanent Danger Zone and the 7-km Extended Danger Zone on the SSW and ENE flanks.

　

Geologic Summary. Beautifully symmetrical Mayon, which rises above the Albay Gulf NW of Legazpi City, is the Philippines' most active volcano. The structurally simple edifice has steep upper slopes averaging 35-40 degrees that are capped by a small summit crater. Historical eruptions date back to 1616 and range from Strombolian to basaltic Plinian, with cyclical activity beginning with basaltic eruptions, followed by longer term andesitic lava flows. Eruptions occur predominately from the central conduit and have also produced lava flows that travel far down the flanks. Pyroclastic flows and mudflows have commonly swept down many of the approximately 40 ravines that radiate from the summit and have often devastated populated lowland areas. A violent eruption in 1814 killed more than 1,200 people and devastated several towns.

　

Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)　http://www.phivolcs.dost.gov.ph/

　

　

Reventador　 | Ecuador　 | 0.077°S, 77.656°W　 | Summit elev. 3562 m

　

During 23-28 May IG reported a high level of seismic activity including explosions, long-period earthquakes, harmonic tremor, and signals indicating emissions at Reventador. Steam, gas, and ash plumes rose 1.5 km above the crater rim and drifted NW on 23 May, and a plume of gas, water vapor, and ash rose 300 m on 26 May; cloudy weather prevented views of emissions on most days. A lava flow had advanced to 900 m on the NE flank. On 27 May incandescent blocks were observed rolling as far as 800 m down the flanks in multiple directions. An ash plume rose 3 km above the crater rim and quickly drifted W, causing ashfall in Papallacta (62 km SW), San Antonio de Pichincha (90 km W), Tabacundo (63 km WNW), Cayambe (57 km WNW), Puellaro (85 km WNW), and Puembo (80 km W).

　

Geologic Summary. Reventador is the most frequently active of a chain of Ecuadorian volcanoes in the Cordillera Real, well east of the principal volcanic axis. The forested, dominantly andesitic Volcán El Reventador stratovolcano rises to 3562 m above the jungles of the western Amazon basin. A 4-km-wide caldera widely breached to the east was formed by edifice collapse and is partially filled by a young, unvegetated stratovolcano that rises about 1300 m above the caldera floor to a height comparable to the caldera rim. It has been the source of numerous lava flows as well as explosive eruptions that were visible from Quito in historical time. Frequent lahars in this region of heavy rainfall have constructed a debris plain on the eastern floor of the caldera. The largest historical eruption took place in 2002, producing a 17-km-high eruption column, pyroclastic flows that traveled up to 8 km, and lava flows from summit and flank vents.

　

Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)　http://www.igepn.edu.ec/

　

　

Sabancaya　 | Peru　 | 15.787°S, 71.857°W　 | Summit elev. 5960 m

　

Observatorio Vulcanológico del Sur del IGP (OVS-IGP) and Observatorio Vulcanológico del INGEMMET (OVI) reported that explosive activity at Sabancaya was comparable to the previous week; explosions averaged 35 per day during 21-27 May. Seismicity was dominated by long-period events and signals indicating emissions. Gas-and-ash plumes rose as high as 3.3 km above the crater rim and drifted 30 km NE, E, and SE. The MIROVA system detected nine thermal anomalies, and on 24 May the sulfur dioxide gas flux was high at 3,950 tons/day. The report noted that the public should not approach the crater within a 12-km radius.

　

Geologic Summary. Sabancaya, located in the saddle NE of Ampato and SE of Hualca Hualca volcanoes, is the youngest of these volcanic centers and the only one to have erupted in historical time. The oldest of the three, Nevado Hualca Hualca, is of probable late-Pliocene to early Pleistocene age. The name Sabancaya (meaning "tongue of fire" in the Quechua language) first appeared in records in 1595 CE, suggesting activity prior to that date. Holocene activity has consisted of Plinian eruptions followed by emission of voluminous andesitic and dacitic lava flows, which form an extensive apron around the volcano on all sides but the south. Records of historical eruptions date back to 1750.

　

Sources: Instituto Geológico Minero y Metalúrgico (INGEMMET)　http://www.ingemmet.gob.pe/;

Instituto Geofísico del Perú (IGP)　http://www.igp.gob.pe/

　

　

Sheveluch　 | Central Kamchatka (Russia)　 | 56.653°N, 161.36°E　 | Summit elev. 3283 m

　

KVERT reported that a weak thermal anomaly over Sheveluch was identified in satellite images on 19-20 and 23-24 May. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).

　

Geologic Summary. The high, isolated massif of Sheveluch volcano (also spelled Shiveluch) rises above the lowlands NNE of the Kliuchevskaya volcano group. The 1300 km3 volcano is one of Kamchatka's largest and most active volcanic structures. The summit of roughly 65,000-year-old Stary Shiveluch is truncated by a broad 9-km-wide late-Pleistocene caldera breached to the south. Many lava domes dot its outer flanks. The Molodoy Shiveluch lava dome complex was constructed during the Holocene within the large horseshoe-shaped caldera; Holocene lava dome extrusion also took place on the flanks of Stary Shiveluch. At least 60 large eruptions have occurred during the Holocene, making it the most vigorous andesitic volcano of the Kuril-Kamchatka arc. Widespread tephra layers from these eruptions have provided valuable time markers for dating volcanic events in Kamchatka. Frequent collapses of dome complexes, most recently in 1964, have produced debris avalanches whose deposits cover much of the floor of the breached caldera.

　

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)　http://www.kscnet.ru/ivs/kvert/index_eng.php

　

　

Turrialba　 | Costa Rica　 | 10.025°N, 83.767°W　 | Summit elev. 3340 m

　

OVSICORI-UNA reported that an event at Turrialba at 0930 on 28 May generated a plume that rose 300 m above the crater rim and drifted SE.

　

Geologic Summary. Turrialba, the easternmost of Costa Rica's Holocene volcanoes, is a large vegetated basaltic-to-dacitic stratovolcano located across a broad saddle NE of Irazú volcano overlooking the city of Cartago. The massive edifice covers an area of 500 km2. Three well-defined craters occur at the upper SW end of a broad 800 x 2200 m summit depression that is breached to the NE. Most activity originated from the summit vent complex, but two pyroclastic cones are located on the SW flank. Five major explosive eruptions have occurred during the past 3500 years. A series of explosive eruptions during the 19th century were sometimes accompanied by pyroclastic flows. Fumarolic activity continues at the central and SW summit craters.

　

Source: Observatorio Vulcanologico y Sismologico de Costa Rica-Universidad Nacional (OVSICORI-UNA)　http://www.ovsicori.una.ac.cr/

　

　

　

　

　

　

　

　

　

　

　

　

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