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25. Howstuffworks "How Earthquakes Work"
- www.howstuffworks.com
- How Earthquakes Work.
- Up until relatively recently, scientists only had unsubstantiated guesses as to what actually caused earthquakes. ...
- There has been enormous progress in the past century: Scientists have identified the forces that cause earthquakes, and developed technology that can tell us an earthquake's magnitude and origin. The next hurdle is to find a way of predicting earthquakes, so they don't catch people by surprise. ...
- In this article, we'll find out what causes earthquakes, and we'll also find out why they can have such a devastating effect on us. ...
- Introduction to How Earthquakes Work.
- Dealing with Earthquakes.
26. The San Andreas fault and the Bay Area
- sepwww.stanford.edu
- (Large earthquakes are named after places near their epicenters, with larger earthquakes being given the names of more important places. ...
- Dating prehistoric San Andreas earthquakes .
- The goal was to try to date previous large earthquakes on this stretch of the San Andreas fault. (If we can discover when large earthquakes have occurred in the past, it lets us start to make educated guesses about when they might occur in the future. ... This is not an unreasonable assumption: we know for a fact that the fault moved horizontally 21 feet (six and a half meters) here in 1906! Any surface disturbance would become buried as the swamp continued to fill in; later earthquakes would thus leave discontinuities closer and closer to the present-day ground surface. ...
- The idea behind this was to find correlatable subsurface features offset by motion during prehistoric earthquakes. If enough corresponding features could be found and dated, it becomes possible to calculate not only when prehistoric earthquakes occurred but also how much the fault offset during them. ...
27. International Seismological Centre
- www.isc.ac.uk
- The Centre's main task is to redetermine earthquake locations making use of all available information, and to search for new earthquakes, previously unidentified by individual agencies. ...
28. Virtual Earthquake - An Introduction
- vcourseware3.calstatela.edu
- Earthquakes occur because of a sudden release of stored energy. ... Most earthquakes take place along faults in the upper 25 miles of the earth's surface when one side rapidly moves relative to the other side of the fault. ... Each year there are thousands of earthquakes that can be felt by people and over one million that are strong enough to be recorded by instruments. ...
29. The Nevada Seismological Laboratory
- www.seismo.unr.edu
30. NCEDC: Make Your Own Seismogram!
- quake.geo.berkeley.edu
- Long period channels - good for viewing distant earthquakes .
- Broadband channels - good for viewing local earthquakes .
- You may wish to refer to a list of recent events in northern and central California or a list of recent events worldwide in order to view specific earthquakes. ...
31. TriNet:The Seismic System for Southern California
- www.trinet.org
- Our goal is to mitigate the impact of future large earthquakes in Southern California. ...
32. SAVAGE EARTH Online
- www.pbs.org
- In this Web companion piece, original articles by journalists Daniel Pendick and Kathy Svitil explain the science behind volcanoes, earthquakes, and tsunamis, and feature original animations that illustrate the action of these natural phenomena. ...
- The Restless Planet: Earthquakes.
- Sidebar: Learning from Earthquakes.
33. USGS Earthquake Hazards Program-Home
- earthquake.usgs.gov
- List of Latest Worldwide Earthquakes Did You Feel It?.
34. Center for Earthquake Research and Information
- www.ceri.memphis.edu
35. San Andreas Fault
- emerald.ucsc.edu
- Earthquakes occur along plate boundaries, like the one shown at right between the Pacific Plate (to the west) and the North American Plate (to the east). ...
36. Faults.html
- www.tinynet.com
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