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Earthquakes
Ground shaking caused by the sudden release of accumulated strain by an abrupt shift of rock along a fracture in the earth or by volcanic or magmatic activity, or other sudden stress changes in the earth.
Subtopics:
Earthquake occurrences (42 items)

Earthquake hazards (53 items)
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Results 71 - 80 of 97 listed alphabetically [list by similarity]
Real-time seismogram displays [More info]
Description of seismograms and how they are produced by drum recorders and electronic instruments with real-time seismograms for Northern California and Long Valley, California and representative seismograms for types of earthquake activity.
Recent earthquakes in Hawaii [More info]
Interactive maps of earthquakes of last 2 hours, last 2 days, and last 2 weeks in Hawaii.
PDF Report on the 2010 Chilean earthquake and tsunami response [More info]
With high property damage, loss of life and fire damage were relatively low. Why? The legal system encourages builders to follow code, the electrical grid was shut down early, and emergency response management was very effective.
PDF Satellite map of Port-au-Prince, Haiti - 2010 - infrared [More info]
Post-earthquake map derived from 1:24,000-scale base maps incorporating high- and medium-resolution remotely sensed imagery following the 7.0 magnitude earthquake near the capital city of Port au Prince, Haiti, on January 12, 2010
PDF Satellite map of Port-au-Prince, Haiti - 2010 - natural color [More info]
Post-earthquake map derived from 1:24,000-scale base maps incorporating high- and medium-resolution remotely sensed imagery following the 7.0 magnitude earthquake near the capital city of Port au Prince, Haiti, on January 12, 2010
Severity of an earthquake [More info]
Description of intensity and magnitude as indicators of the size of an earthquake and the levels of severity measured on the Richter Magnitude Scale and the Modified Mercalli Intensity Scale.
PDF ShakeAlert: an earthquake early warning system for the United States West Coast [More info]
Describes a demonstration system that could be developed to improve the time people have to prepare for the ground shaking that accompanies earthquakes in the Western US.
ShakeMap [More info]
ShakeMap sites provide near-real-time maps of ground motion and shaking intensity following significant earthquakes.
PDF St. Louis Area Earthquake Hazards Mapping Project [More info]
Overview of USGS research focused on earthquake hazards of this specific area.
PDF The 1964 Great Alaska Earthquake and tsunamis--a modern perspective and enduring legacies [More info]
Summarizes what we learned about this historic earthquake and how our ability to monitor and respond to events of this type have changed, including our awareness of tsunami effects.
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