• UTC: 2017-06-23 22:12

Why Can’t We Predict Earthquakes?

In late October, Italian courts convicted six scientists and a government official—all members of the National Commission for the Forecast and Prevention of Major Risks—of manslaughter for giving "incomplete, imprecise and contradictory" information in the days leading up to an earthquake that struck L'Aquila on April 6, 2009. Tens of thousands of buildings were destroyed,

How to Read Drum Seismograms


Interpretation: When an earthquake occurs the seismogram will show ground motions that typically last from several tens of seconds to many minutes, depending on the size of the earthquake and the sensitivity of the seismograph. The height of the recorded waves on the seismogram (wave amplitude) is a greatly magnified representation of the actual ground

Richter magnitude scale and energy equivalents in terms of TNT explosive force


  The following table lists the approximate energy equivalents in terms of TNT explosive force – though note that the earthquake energy is released underground rather than overground.[21] Most energy from an earthquake is not transmitted to and through the surface; instead, it dissipates into the crust and other subsurface structures. In contrast, a small

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