March 22nd, 2008 by Kishore
Category: Earthquakes |
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November 8th, 2007 by Kishore
Category: Earthquakes, Science in Action |
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May 2nd, 2007 by Kishore
Category: Earthquakes, General |
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April 19th, 2007 by Kishore
Here are something interesting links for the earthquake fanatic:
Nor Cal USGS
Real Time Earthquake Maps (California-Nevada)
Real-time Shaking Maps for California earthquakes of Magnitude 3.5 and larger
1906 San Francisco Earthquake ShakeMaps
Earthquake Probabilities for the San Francisco Bay Area
USGS and other scientists conclude that there is a 62% probability of at least one magnitude 6.7 or greater quake, capable of causing widespread damage, striking the San Francisco Bay region before 2032.
General Quake Info
Earthquake basics and educational material; geological and historical information; links to professional and amateur organizations; online access to earthquake data.
Hazards & Preparedness
How to prepare your home, business and family for earthquake hazards; earthquake probabilities; shaking hazard maps; liquefaction hazard and earthquake engineering.
Earthquake Research
Current research activities and results in seismology, crustal structure and deformation, geology and borehole physics.
UC Berkeley Quake Site
Historical Earthquake Intensity Information
1868 Hayward Earthquake History:
http://www.museumoflocalhistory.org/pages/list.php?topic=earthquake
http://www.sfmuseum.org/hist1/1868eq.html
http://www.sfmuseum.org/hist4/68oakl.html
http://seismo.berkeley.edu/faq/1868_0.html
http://cires.colorado.edu/~bilham/HaywardCreep.html
California Department of Insurance - California Earthquake Information
California Reader: Stories about earthquakes
Hayward Fault Tour
A website showing the surface expressions of the Hayward Fault.
Paleoseismology, Hayward Fault, California
A large, widely damaging earthquake will occur on the Hayward fault in the future. That much we know. What we don’t know is when.
Predictive Intensity Map for 1868 Hayward Fault
This is the intensity distribution we would expect for a repeat of the 1868 earthquake which was a M=7.0 event on the Hayward fault.
Finally there is a great Google Earth Flyover of the Hayward fault put together by Jim Lienkaemper, a USGS geologist. Map showing active fault traces within the Hayward Fault Zone, including a virtual tour of the Hayward fault in the east San Francisco Bay Region that can be viewed in the Google Earth.
Category: Earthquakes |
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April 1st, 2007 by Kishore
Magnitude 9 quakes are generally caused by subduction events. There are 40,000 km of subduction boundaries around the Pan Pacific Rim. Seismologists have been studying these subduction zones to identify high risk areas for high mag quakes. Why? A mag 9.0 quake caused the 2004 tsunami in Indonesia, killing over 300K.
Earthquake science utilizes all sorts of data, earth temperature, geologic features, physics, even historical data. When you boil down the search for the next big one, we always end up at a question of probability.
Looking at all this data, they have identified a number of troubling (ie high probability) subduction zones. One big problem, the Sumatran-Andaman earthquake that caused the 2004 tsunami did NOT occur in a likely zone.
What does that mean? Most likely, our understanding of “danger” subduction zones is by no means refined. That doesn’t mean we should abandon our study of these zones, but frankly admitting our lack of knowledge in this area seems right on.
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Category: Earthquakes |
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