USGS: Science Topics: earthquakes

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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 (45 items)

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Results 41 - 50 of 88 listed by similarity [list alphabetically]

Helping safeguard Veterans Affairs' hospital buildings by advanced earthquake monitoring [More info]: We put seismic monitoring instruments into 20 VA hospital buildings, connected with computers that analyze their data to determine rapidly the structural health of the buildings in the event of earthquakes.
Latest earthquakes in the USA - Past 7 days [More info]: Real-time earthquake maps of the conterminous U.S., Alaska, Hawaii, and Puerto Rico displaying magnitude and location of earthquake activity in the past hour, past day, and past week.
Latest worldwide earthquakes [More info]: Near real-time list of earthquakes recently occurring anywhere in the world.
Maps of recent earthquake activity in California-Nevada [More info]: Near-real-time maps of location, ground motion, and shaking intensity of earthquakes in California and Nevada for the past hour, past day, and past week and links to other earthquake information.
National Earthquake Information Center [More info]: Information on world earthquake activity with links to facts and lists on large earthquakes, earthquake e-mail notification, hazards and preparedness, educational links, news and highlights and other seismic information.
Natural Hazards - Earthquakes [More info]: News and related information focusing on the importance of earthquake hazards in the United States.
PAGER--Rapid assessment of an earthquake's impact [More info]: An automated system for rapidly estimating the shaking distribution, number of people and settlements exposed to severe shaking, and range of possible fatalities and economic losses. A color-coded alert suggests levels of appropriate response.
Recent earthquakes in Hawaii [More info]: Interactive maps of earthquakes of last 2 hours, last 2 days, and last 2 weeks in Hawaii.
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.
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.

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