Harry Green

Study Proposes Common Mechanism for Shallow and Deep Earthquakes

Anonymous — Mon, 13 Aug 2018 20:49:50 +0000

Study Proposes Common Mechanism for Shallow and Deep Earthquakes Anonymous (not verified) Mon, 08/13/2018 - 13:49 More News May 18, 2016 Riverside, Ca

"Earthquakes are labeled “shallow” if they occur at less than 50 kilometers depth. They are labeled “deep” if they occur at 300-700 kilometers depth. When slippage occurs during these earthquakes, the faults weaken. How this fault weakening takes place is central to understanding earthquake sliding.

A new study published online in Nature Geoscience today by a research team led by University of California, Riverside geologists now reports that a universal sliding mechanism operates for earthquakes of all depths – from the deep ones all the way up to the crustal ones."

Global Climate & Environmental Change

Geologists Simulate Deep Earthquakes in the Laboratory

Anonymous — Mon, 13 Aug 2018 18:24:20 +0000

Geologists Simulate Deep Earthquakes in the Laboratory Anonymous (not verified) Mon, 08/13/2018 - 11:24 More News October 11, 2013 Riverside, Ca

"More than 20 years ago, geologist Harry Green, now a distinguished professor of the graduate division at the University of California, Riverside, and colleagues discovered a high-pressure failure mechanism that they proposed then was the long-sought mechanism of very deep earthquakes (earthquakes occurring at more than 400 km depth).

The result was controversial because seismologists could not find a seismic signal in the Earth that could confirm the results."

Earthquakes & Geophysics

Geophysicists Claim Conventional Understanding of Earth's Deep Water Cycle Needs Revision

Anonymous — Mon, 13 Aug 2018 17:24:16 +0000

Geophysicists Claim Conventional Understanding of Earth's Deep Water Cycle Needs Revision Anonymous (not verified) Mon, 08/13/2018 - 10:24 More News October 21, 2010 Riverside, Ca

"A popular view among geophysicists is that large amounts of water are carried from the oceans to the deep mantle in “subduction zones,” which are boundaries where the Earth’s crustal plates converge, with one plate riding over the other.

But now geophysicists led by the University of California, Riverside’s Harry Green, a distinguished professor of geology and geophysics, present results that contradict this view. They compare seismic and experimental evidence to argue that subducting slabs do not carry water deeper than about 400 kilometers."

Sedimentary Geochemistry & Organic Geochemistry, Global Climate & Environmental Change