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The Department of Geosciences and Princeton University congratulates Dr. Wenjie Lei on successfully defending his Ph.D. thesis: "Global Seismic Full-Waveform Inversion" on Wednesday, May 8, 2019.
Seismologists Jessica Irving and then-graduate student Wenbo Wu (who just defended his thesis last month!) used earthquake waves measured after a 1994 magnitude 8.2 earthquake to find underground mountains, at the bottom of the mantle’s “transition zone,” located 660 kilometers straight down.
Earth has a song, a symphony composed of ubiquitous, continuous subtle seismic signals that thrum beneath the hustle and bustle of modern society. The term “ambient seismic noise” is the “classic nomenclature found in scientific literature,” often used to describe both microseisms and seismic hum, although “these are not synonyms,” says Lucia Gualtieri, a postdoctoral research associate in geophysics at Princeton University.
Seismologists use waves generated by earthquakes to scan the interior of our planet, much like doctors image their patients using medical tomography. Earth imaging has helped us track down the deep origins of volcanic islands such as Hawaii, and identify the source zones of deep earthquakes. “Imagine a radiologist forced to work with a CAT scanner that is missing two-thirds of its necessary sensors,” said Frederik Simons, a professor of geosciences at Princeton.
The Department of Geosciences and Princeton University congratulates Dr. Wenbo Wu on successfully defending his Ph.D. thesis: "Short Period Body Waves Unveil Deep Earth's Small-Scale Structure: From A Subducted Slab to the Core" on Tuesday, January 22, 2019.
In this video, The New York Academy of Sciences travel to Princeton University to meet with Blavatnik Regional Finalists in in Physical Sciences & Engineering. Lucia Gualtieri, Ph.D., a seismologist deciphering seismic background signals surrounding environmental processes such as hurricanes and landslides at Geosciences is featured along with other finalists.
Published on the Princeton University Facebook account this morning was Prof. Jeroen Tromp's statement on yesterday's Virginia earthquake. Appearing along side the statement was a Global ShakeMovie documenting the earthquake and an array of comments coming in from all facets of Facebook life.