Sunday, June 27, 2010

Re: [californiadisasters] NASA Radar Images Show How Mexico Quake Deformed Ea...

Ed, the immortal words of Foghorn T. Leghorn apply to Lewis' post:

"That's a JOKE--I SAY that's a JOKE, son!"

(Mexico was "cut" or "added to"--not sure which--by 10 ft/3m, as noted in
the post he was replying to. I won't comment on the quality of the joke, but
it indeed was a joke.)

------------
(I hope, Ed, that your reply was also a joke.)

----- Original Message -----
From: "Ed Hannigan" <edward.hannigan@gmail.com>
To: <californiadisasters@yahoogroups.com>
Cc: <geology2@yahoogroups.com>; <californiasearthquakeforum@yahoogroups.com>
Sent: Sunday, June 27, 2010 1:00 PM
Subject: Re: [californiadisasters] NASA Radar Images Show How Mexico Quake
Deformed Ea...


Is this what this group is going to turn into ? Badly spelled political
attacks. God, I hope not.

Edward Hannigan

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On Sun, Jun 27, 2010 at 10:01 AM, <lnmolino@aol.com> wrote:

>
>
> BOYCUT MEXICO!
>
> Louis N. Molino, Sr., CET
> FF/NREMT-B/FSI/EMSI
> Freelance Consultant/Trainer/Author/Journalist/Fire Protection Consultant
>
> LNMolino@aol.com
>
> 979-412-0890 (Cell Phone)
>
> "A Texan with a Jersey Attitude"
>
> "Great minds discuss ideas; Average minds discuss events; Small minds
> discuss people" Eleanor Roosevelt - US diplomat & reformer (1884 - 1962)
>
> In a message dated 6/27/2010 12:00:26 P.M. Central Daylight Time,
> linkerns@gmail.com writes:
>
>
>
> [image: 100624141524-large.jpg]
>
> *Overview of the UAVSAR interferogram of the magnitude 7.2 Baja California
> earthquake of April 4, 2010, overlaid atop a Google Earth image of the
> region. Major fault systems are shown by red lines, while recent
aftershocks
> are denoted by yellow, orange and red dots. (Credit: NASA/JPL/USGS/Google)
> *
>
> NASA Radar Images Show How Mexico Quake Deformed Earth
>
> ScienceDaily (June 25, 2010) — NASA has released the first-ever airborne
> radar images of the deformation in Earth's surface caused by a major
> earthquake -- the magnitude 7.2 temblor that rocked Mexico's state of Baja
> California and parts of the American Southwest on April 4.
>
> The data reveal that in the area studied, the quake moved the Calexico,
> Calif., region in a downward and southerly direction up to 80 centimeters
> (31 inches). The maps can be seen at:
> http://www.nasa.gov/topics/earth/features/UAVSARimage20100623.html .
>
> A science team at NASA's Jet Propulsion Laboratory, Pasadena, Calif., used
> the JPL-developed Uninhabited Aerial Vehicle Synthetic Aperture Radar
> (UAVSAR) to measure surface deformation from the quake. The radar flies at
> an altitude of 12.5 kilometers (41,000 feet) on a Gulfstream-III aircraft
> from NASA's Dryden Flight Research Center, Edwards, Calif.
>
> The team used a technique that detects minute changes in the distance
> between the aircraft and the ground over repeated, GPS-guided flights. The
> team combined data from flights on Oct. 21, 2009, and April 13, 2010. The
> resulting maps are called interferograms.
>
> The April 4, 2010, El Mayor-Cucapah quake was centered 52 kilometers (32
> miles) south-southeast of Calexico, Calif., in northern Baja California.
It
> occurred along a geologically complex segment of the boundary between the
> North American and Pacific tectonic plates. The quake, the region's
largest
> in nearly 120 years, was also felt in southern California and parts of
> Nevada and Arizona. It killed two, injured hundreds and caused substantial
> damage. There have been thousands of aftershocks, extending from near the
> northern tip of the Gulf of California to a few miles northwest of the
U.S.
> border. The area northwest of the main rupture, along the trend of
> California's Elsinore fault, has been especially active, and was the site
of
> a large, magnitude 5.7 aftershock on June 14.
>
> UAVSAR has mapped California's San Andreas and other faults along the
plate
> boundary from north of San Francisco to the Mexican border every six
months
> since spring 2009, looking for ground motion and increased strain along
> faults. "The goal of the ongoing study is to understand the relative
hazard
> of the San Andreas and faults to its west like the Elsinore and San
Jacinto
> faults, and capture ground displacements from larger quakes," said JPL
> geophysicist Andrea Donnellan, principal investigator of the UAVSAR
project
> to map and assess seismic hazard in Southern California.
>
> Each UAVSAR flight serves as a baseline for subsequent quake activity. The
> team estimates displacement for each region, with the goal of determining
> how strain is partitioned between faults. When quakes do occur during the
> project, the team will observe their associated ground motions and assess
> how they may redistribute strain to other nearby faults, potentially
priming
> them to break. Data from the Baja quake are being integrated into JPL's
> QuakeSim advanced computer models to better understand the fault systems
> that ruptured and potential impacts to nearby faults, such as the San
> Andreas, Elsinore and San Jacinto faults.
>
> One figure (Figure 1) shows a UAVSAR interferogram swath measuring 110 by
> 20 kilometers (69 by 12.5 miles) overlaid atop a Google Earth image. Each
> colored contour, or fringe, of the interferogram represents 11.9
centimeters
> (4.7 inches) of surface displacement. Major fault lines are marked in red,
> and recent aftershocks are denoted by yellow, orange and red dots.
>
> The quake's maximum ground displacements of up to 3 meters (10 feet)
> actually occurred well south of where the UAVSAR measurements stop at the
> Mexican border. However, these displacements were measured by JPL
> geophysicist Eric Fielding using synthetic aperture radar interferometry
> from European and Japanese satellites and other satellite imagery, and by
> mapping teams on the ground.
>
> Scientists are still working to determine the exact northwest extent of
the
> main fault rupture, but it is clear it came within 10 kilometers (6 miles)
> of the UAVSAR swath, close to the point where the interferogram fringes
> converge. "Continued measurements of the region should tell us whether the
> main fault rupture has moved north over time," Donnellan said.
>
> An enlargement of the interferogram is shown in another figure (Figure 2),
> focusing on the area where the largest deformation was measured. The
> enlargement, which covers an area measuring about 20 by 20 kilometers
(12.5
> by 12.5 miles), reveals many small "cuts," or discontinuities, in the
> fringes. These are caused by ground motions ranging from a centimeter to
> tens of centimeters (a few inches) on small faults. "Geologists are
finding
> the exquisite details of the many small fault ruptures extremely
interesting
> and valuable for understanding the faults that ruptured in the April 4th
> quake," said Fielding. Another figure, (Figure 3) shows a close-up of the
> region where the magnitude 5.7 aftershock struck.
>
> "UAVSAR's unprecedented resolution is allowing scientists to see fine
> details of the Baja earthquake's fault system activated by the main quake
> and its aftershocks," said UAVSAR Principal Investigator Scott Hensley of
> JPL. "Such details aren't visible with other sensors."
>
> UAVSAR is part of NASA's ongoing effort to apply space-based technologies,
> ground-based techniques and complex computer models to advance our
> understanding of quakes and quake processes. The radar flew over
Hispaniola
> earlier this year to study geologic processes following January's
> devastating Haiti quake. The data are giving scientists a baseline set of
> imagery in the event of future quakes. These images can then be combined
> with post-quake imagery to measure ground deformation, determine how slip
on
> faults is distributed, and learn more about fault zone properties.
>
> UAVSAR is also serving as a flying test bed to evaluate the tools and
> technologies for future space-based radars, such as those planned for a
NASA
> mission currently in formulation called the Deformation, Ecosystem
Structure
> and Dynamics of Ice, or DESDynI. That mission will study hazards such as
> earthquakes, volcanoes and landslides, as well as global environmental
> change.
>
> For more information on UAVSAR, visit: http://uavsar.jpl.nasa.gov/
> *Story Source:*
>
> The above story is reprinted (with editorial adaptations by
Science*Daily*staff) from materials provided by
> *NASA/Jet Propulsion Laboratory* <http://www.jpl.nasa.gov/>.
>
> ------------------------------
>
> NASA/Jet Propulsion Laboratory. "NASA Radar Images Show How Mexico Quake
> Deformed Earth." *ScienceDaily* 25 June 2010. 27 June 2010 <*
> http://www.sciencedaily.com­ /releases/2010/06/100624141524.htm>.*
>
>
>
>
>
>
> --
> Got Penguins?
> http://penguinnewstoday.blogspot.com/
> http://penguinology.blogspot.com/
>
> >^,,^<
>
>
>

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