Invitation to the talk of the Humboldt Research Prize awardee
Prof. Dr. Roel Snieder
Professor of Basic Exploration Science
Center for Wave Phenomena
Colorado School of Mines
On
Measuring time-lapse changes in the Earth from noisy waveforms.
The talk will be given at 10:30 on September 10, 2014 at GeoForschungsZentrumBuilding A19 (second floor)TelegrafenbergPotsdam
As awardee of the Research Prize from the Alexander von Humboldt Foundation Prof. Snieder is presently on sabbatical leave at the GFZ-Potsdam.
F. Tilmann / C. Sens-Schönfelder
GeoForschungsZentrum Potsdam
Section 2.4
Abstract: Seismic waveforms consisting of noise or strongly scattered waves appear to be purely random and contain no information. Yet, such waveforms recorded at different seismological stations contain hidden correlations. These correlations depend on the waves that propagate between these stations. This principle can be used to extract the response of the Earth, buildings, and other structures. Since noise is ever-present, this is a valuable tool for monitoring time-lapse changes in the Earth. I show examples of the reduction and subsequent recovery of the near-surface shear wave velocity after the 2009 Tohoku-Oki earthquake.
