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domingo, 8 de maio de 2011 Big Quakes

Big Quakes Trigger Small Quakes
Seismologists Find Large Earthquakes Can Trigger Smaller Ones In Unlikely Locations

ScienceDaily () -- Seismologists found that L-waves, slow-moving seismic surface waves, from larger earthquakes can trigger smaller earthquakes as they travel through the ground. Different from aftershocks because they can happen farther away and hours or days later, the triggered tremors rate much lower on the magnitude scale--often undetectable without a seismograph.

An earthquake in Alaska could trigger one near you, even if you're not in an earthquake-prone area, new research shows. Seismologists are now finding earthquakes in some unexpected places.