Team sets records in simulating seismic wave propagation across the Earth

To learn more about the inner sanctum of the earth’s core, seismologists take advantage of one of nature’s most destructive forces: earthquakes. Somewhat like the way a CAT scan images the brain, seismologists track seismic wave patterns from earthquakes to model the structure of the earth’s core. One of the great challenges is to capture the propagation of high-frequency waves, with periods of 1 to 2 seconds, as they travel across the globe. To simulate this activity, seismologists employ a spectral-element application called SPECFEM3D_GLOBE that uses a fine mesh of hexahedral finite elements, pictured here, and high-performance computers. Credit: D. Komatitsch, Université de Pau; L. Carrington, San Diego Supercomputer Center at UC San Diego

Electronic heat trap grips deep Earth

(PhysOrg.com) -- The key to understanding Earth's evolution, including how our atmosphere gained oxygen and how volcanoes and earthquakes form, is to look deep, really deep, into the lower mantle—a region some 400 to 1,800 miles (660 to 2,900 kilometers) below the surface.