News tagged with plate tectonics

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The case for alien life

Only one planet has been proven to support life: Earth. But evidence is mounting that we are not alone. Biogeochemist Ariel Anbar and astrophysicist Steven Desch, professors in ASU's School of Earth and Space ...

Jul 16, 2013 3.2 / 5 (13) 2

New maps show how shipping noise spans the globe

The ocean is naturally filled with the sounds of breaking waves, cracking ice, driving rain, and marine animal calls, but more and more, human activity is adding to the noise. Ships' propellers create low-frequency hums that ...

May 31, 2013 5 / 5 (1) 0

A global murmur, then unusual silence

In the global aftershock zone that followed the major April 2012 Indian Ocean earthquake, seismologists noticed an unusual pattern. The magnitude (M) 8.6 earthquake, a strike-slip event at intraoceanic tectonic plates, caused ...

Apr 19, 2013 4.4 / 5 (5) 2

Live, from the bottom of the sea

Lamont-Doherty scientist Timothy Crone is at sea off the Northwest U.S. coast, dropping sensors into the deep ocean as part of a major initiative to better understand oceans, climate and plate tectonics. You ...

Aug 26, 2011 5 / 5 (1) 0

Interview: The science behind earthquakes

(PhysOrg.com) -- A series of major earthquakes have struck countries in the Caribbean, South America and Asia, causing catastrophic damage. Large-scale relief efforts are in place in the hardest-hit nations, ...

Mar 16, 2010 4.5 / 5 (2) 0

Earthquake waves: How do they spread?

Propagation of earthquake waves within the Earth is not uniform. Experiments indicate that the velocity of shear waves (s-waves) in Earth’s lower mantle between 660 and 2900 km depth is strongly dependent on the orientation ...

Apr 13, 2009 3.7 / 5 (3) 0