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Research may explain mysterious deep earthquakes in subduction zones

Earthquakes that happen deep beneath the earth’s surface have long been enigmatic to geologists. Now researchers from Brown University have shown strong evidence that water squeezed out of a mineral called lawsonite could trigger these mysterious quakes.

PROVIDENCE, R.I. [Brown University] — Geologists from Brown University may have finally explained what triggers certain earthquakes that occur deep beneath the Earth’s surface in subduction zones, regions where one tectonic plate slides beneath another. (more…)

California Faults Moved Quietly After Baja Quake

By Guest PostMay 4, 2014Environmentandrea donnellan, atomarer nanoassembler, aus einem atom, blinder delfin, cultural psychologists, deep earthquakes, earthquake, earthquake cycle, east asians, gain face, give face, indus delfin, keishi okazaki, kilian singer, landslides, magnitude, moral purity, northern mexico, thomas bugnyar, uavsar, volcanoes, wie affen

A new NASA study finds that a major 2010 earthquake in northern Mexico triggered quiet, non-shaking motions on several Southern California faults that released as much energy as a magnitude 4.9 to 5.3 earthquake.

The quiet motion associated with the widely felt, magnitude 7.2 earthquake centered in northern Baja California in Mexico, in April 2010 was discovered in before-and-after radar images of the region made by a NASA airborne instrument that produces extremely accurate maps of Earth motions. The Uninhabited Aerial Vehicle Synthetic Aperture Radar (UAVSAR), which flies on a NASA C-20A aircraft from NASA’s Armstrong Flight Research Center facility in Palmdale, Calif., allows scientists to see how locations on Earth’s surface change between repeat flights over the same spot. (more…)

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Research may explain mysterious deep earthquakes in subduction zones

California Faults Moved Quietly After Baja Quake