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Geology 15 Mid Term II Review. Focal mechanisms are diagrams made from first motion seismologic records that show the possible motion on a fault, and the possible sense of motion on that fault. There are two possible fault planes for each focal mechanism.
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Focal mechanisms are diagrams made from first motion seismologic records that show the possible motion on a fault, and the possible sense of motion on that fault. There are two possible fault planes for each focal mechanism.
http://earthquake.usgs.gov/earthquakes/world/10_largest_world.phphttp://earthquake.usgs.gov/earthquakes/world/10_largest_world.php