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Caltech Today: Tracking
Earth Changes with Satellite Images
For the past two decades, radar images from satellites have
dominated the field of geophysical monitoring for natural
hazards like earthquakes, volcanoes, or landslides. These
images reveal small perturbations precisely, but large changes
from events like big earthquake ruptures or fast-moving glaciers
remained difficult to assess from afar, until now.
Caltech Today: Earthquake
Season in the Himalayan Front
Scientists have long searched for what triggers earthquakes,
even suggesting that tides or weather play a role. Recent
research spearheaded by Jean-Philippe Avouac, professor of
geology and director of the Tectonics Observatory at Caltech,
shows that in the Himalayan mountains, at least, there is
indeed an earthquake season. It's winter.
20 November 2007
UN Relief Web:Padang:
a major Indonesian city threatened by disaster
International scientists are concerned about the growing
threat of an earthquake or a tsunami in the Indonesian city
of Padang, which has 800,000 inhabitants.
10 November 2007
Hiroo Kanamori - Recipient of the 2007 Kyoto Prize from the Inamori Foundation, for his "elucidation of physical processes of earthquakes and its application to hazard mitigation"
6 October 2007
Rakyat Benkulu Newspaper, Sumatra Indonesia:
News story about the Mentawai seismic gap. (pdf) *this
article is in Indonesian*
CNN Top Stories: Earthquake Hunters
CNN's Hugh Riminton spends time with geologists [John Galetzka]
looking for signs of the next big Pacific earthquake.
Caltech's John Galetzka filmed 2 recent earthquakes. CNN
15 September 2007
PADANG, Indonesia: Experts warn 'big one' may yet hit Indonesia (pdf)
"No one can say whether it will be in 30 seconds or
30 years," he [Kerry Sieh] said. "But what happened
the other day, I think is quite possibly a sequence of smaller
earthquakes leading up to the bigger one."
14 September 2007
Tremors in Singapore drive home need for emergency
14 September 2007
STRAITS TIMES: Singapore
Monster Quake Could Hit Soon (pdf)
The earthquakes off Sumatra could portend a monster quake,
and it could hit soon. Caltech's Kerry Sieh says the Mentawai
patch, an area of strong resistence just southwest of Padang
Sumatra, is "close to no longer being able to stand
the strain" of continuing pressure buildup.
14 September 2007
Kerry Sieh, currently on sabbtical in Singapore, talks about
recent and historic large earthquakes in coastal west Sumatra.
article is in Chinese*
13 September 2007
CHANNEL NEWS ASIA: Singapore residents concerned(pdf)
Four aftershocks felt in Singapore following 8.4 magnitude
earthquake that struck Sumatra Wednesday evening.
17 August 2007
Mysteries: What Happens Inside an Earthquake?(pdf)
"...when faults do move, something is missing -- there
is little to no evidence of the extremely high levels of
friction and melting that would be expected to follow above
ground when two giant rocks slid against each other. "There
are many reasons to believe that something exotic is happening," said
Caltech geophysicist Tom Heaton..."
28 July 2007
The New York Times: Indonesian Town Begins Preparations for the Next
"...historical records, seismic monitoring by global
positioning sensors and a careful study of growth patterns
of corals converged in a remarkably precise prediction of
a major earthquake and tsunami here within the next 30 years."
John Eiler - Recipient of the 2007 ASCIT (Associated Students of the California Institute of Technology) Teaching Award
Thomas Heaton - Elected Fellow of the American Geophysical Union, 2007, "for acknowledged eminence in one or more branches of geophysics"
Ting Chen - Recipient of the 2006 AGU Outstanding Student Paper Award, for "Scaling of seismic moment with recurrence interval for small repeating earthquakes simulated on rate-and-state faults"