N. Sulawesi volcano spews lava 2 kilometers
- Lita Aruperes
North Sulawesi's Mount Karangetang, which erupted on Wednesday, has continued to emit ash into the sky on Thursday.
The volcano, located in Siau Tagulandang Biaro ( Sitaro ) Islands regency, North Sulawesi, sent hot lava as far as 2 kilometers from its crater when it erupted around 5 p.m. local time on Wednesday.
"Mt. Karangetang has erupted again. There had been no volcanic activity in the last few days before it erupted on Wednesday afternoon," said Abed Anthoni, a resident of Bebali subdistrict, East Siau district.
He said East Siau residents did not consider yesterday's eruption to be out of the ordinary, but remained alert in carrying out their daily activities.
"I told my wife and our children that we have to anticipate the potential for greater eruptions," Abed said.
Sitaro Disaster Mitigation Agency ( BPBD ) head Bob Chalton Wuaten said the lava from Mt. Karangetang started flowing at around 5 p.m. on Wednesday. "It went toward the Kahetang River, around 2,000 meters from the crater. The new dome on its peak collapsed during the eruption, causing the hot lava flow," he said.
Bob added that Mt. Karangetang's volcanic alert status remained at Level 2, indicating the need for caution, despite Wednesday's eruption.
"We call on all residents in Boro, Tararone subdistrict, East Siau district, to stay alert because the potential for the volcano to spew pyroclastic clouds is still huge. The peak of Mt. Karangetang cannot be monitored visually because it is still shrouded with thick ash plumes," said Bob. ( ebf )
White Island volcano erupts for first time in three years at New Zealand's Bay of Plenty
- A volcano just off the coast of New Zealand's North Island has erupted
- A plume of ash could be seen hanging over White Island, off Bay of Plenty
- The small eruption took place on Wednesday between 9.30pm and 11pm
- Seismic activity has since returned to normal since the minor eruption
Published: 27 April 2016
A plume of ash has been sent into the air after a volcano in New Zealand erupted for the first time in three years.
The small eruption took place on White Island, around 50 kilometres east of New Zealand's Bay of Plenty, on the North Island, between 9.30pm and 11pm on Wednesday, according to GNS Science
Volcano expert Agnes Mazot said it appears the eruption deposited material over the north side of the crater floor and up onto the north crater wall.
There has been a minor volcanic eruption on White Island, located off the coast of New Zealand's Bay of Plenty
Volcano expert Agnes Mazot said the eruption deposited material over the north side of the crater floor and wall (Pictured: Eruption that took place in 1999)
She said the volcano had not erupted since 2013 and was still being monitored 'closely' for anymore activity, according to Stuff.co.nz.
Seismic activity appears to have returned to normal and no more eruptive activity has been recorded since.
The eruption forced the volcanic alert level to be raised from level one to level three - indicating minor volcanic eruption.
The aviation alert has been upgraded to orange.
The island, 48 kilometres off the east coast of New Zealand's North Island, is a popular tourist destination
Experts said there has not been any eruptive activity seen since about 11pm on Wednesday
On Wednesday GNS reported minor volcanic unrest on the island with the water level in the crater lake falling by two metres in recent weeks, while its temperature had risen by 2 degrees Celsius to 58 degrees Celsius since February.
It did not change either the volcanic alert level or the aviation alert.
Scientists on watch after White Island eruption
GNS Science reported that the eruption, between 9.30pm and 11pm yesterday, appeared to have deposited material over the north side of the floor of the crater and up on to the north crater wall.
It came with moderately elevated seismic activity, but levels had returned back to normal.
There was not yet a clear view of the crater visible from CCTV cameras on the island and GNS volcanologists were monitoring the situation.
Meanwhile, the island's Volcanic Alert Level had been elevated from 1 to 3, meaning a minor volcanic eruption had happened.
The aviation colour code had changed from green to orange, meaning the volcano was exhibiting "heightened unrest with increased likelihood of eruption" or that an eruption was under way with no or minor ash emission.
Over the past couple of weeks, GNS scientists had observed a fall of 2m in the water level of the island's crater lake.
Despite this, they hadn't noted any changes in other monitored parameters like the amount of volcanic gas being emitted, fumarole temperatures and volcanic tremors or earthquakes.
On the last visit, GNS volcanologist Brad Scott confirmed the lake level had dropped 2m in the past fortnight and that its levels had returned to what they were in 2014.
The drop in water level of the lake had also revealed several islands or crater outlines and the lake temperature has increased from 56C to 58C since February.
There had been a small decrease in the temperature of the hottest fumarole -- from 169C to 161C -- since February, while outputs of sulphur dioxide had ranged between between 90 and 480 tonnes a day during the past five weeks, which were typical values for White Island.
In 2012, the 2km-wide, 321m-high, circular chunk of rock 48km off the Bay of Plenty sprang back into life over two months, ending more than a decade of peace.
A series of quakes soon escalated into something scientists hadn't witnessed in New Zealand for a half a century -- the volcano extruded lava, appearing on the surface as a black, craggy lava dome, plugging magma just below the surface.
This was followed by heating in the crater lake and steam explosions in early 2013 which removed the lake.
By June that year, the lake was back, although eruptions followed in August and October.
Unrest has continued, but scientists say eruptions shouldn't worry people.
An eruption would likely have little or no effect on the mainland 48km away -- nearly all previous eruptions had only affected the island itself -- but under certain wind conditions, a light ashfall could carry a fine layer of pollen-like ash.