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Earthquake |
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Earthquake A geological event caused by shifting tectonic plates, triggered by a sudden release of energy in the Earth's crust that creates seismic waves. Earthquakes are recorded with a seismometer, also known as a seismograph. The moment magnitude (or the related and mostly obsolete Richter magnitude) of an earthquake is conventionally reported. Magnitudes of 3 or lower are mostly imperceptible; magnitudes of 7 or more cause serious damage over large areas. Intensity of shaking is measured on the modified Mercalli scale Cause of death Direct trauma due to collapse of buildings, dehydration, shock, crush injury Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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adventitious crisis Boxing Day Tsunami Climatologic Disaster disaster Epicentre Foreshocks geologic disaster Geological Disaster Landslide Natural Disaster Rescue Robot risk tidal wave yellow fever | Working with colleague Prof Adrian Constantin, Prof Johnson has now produced a mathematical formula which helps understand how seaquakes result in tsunami waves. Caspar Henderson has observed how natural defences against a seaquake such as mangrove swamps, coral reefs and sand dunes have been cleared away to make room for commercial hotels and resorts. Brongersma-Sanders (1957) compiled an exhaustive review of marine wildlife "catastrophes" and categorized the causes as vulcanism (volcanic activity), tectonic earth- and seaquake, change in salinity, temperature change, noxious waterbloom, lack of oxygen, and by poisonous gases, severe storms, as connected with spawning runs, by stranding, or uncertain. |
seaquake |
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