Thread: IRIS Webinar 4/24 - Seismic interferometry and tomography: from shallow to deep

Started: 2013-04-17 22:20:43
Last activity: 2013-04-17 22:20:43
Topics: Early Careers
The next IRIS webinar, sponsored by its USArray Transportable Array
working group, will present "Seismic interferometry and tomography: from
shallow to deep" on April 24th from 2-3 pm ET (6-7 pm UTC).

Register to attend: https://www2.gotomeeting.com/register/602417842. You
will be emailed a confirmation containing a link for accessing the
webinar. The presentation and subsequent interactions between the
speaker, host, and audience are recorded and made available within a few
days. Access to the webinar archive, along with related materials and
more information on the series is found here:
http://www.iris.edu/hq/webinar/

Presenter: Fan-Chi Lin, California Institute for Technology

Summary: Seismic waves propagating through the earth's interior are
important tools to study earth structure. Recently, large-scale seismic
array deployments have promoted the development of new data analysis
methods. Surface-wave tomography, which uses surface waves to determine
crustal and upper mantle structure, and seismic interferometry, which
extracts waves traveling between two stations by cross-correlating long
duration noise signals, are among the many exciting research areas. In
this presentation, I will demonstrate how high-resolution surface-wave
phase velocity, amplification, and ellipticity maps can be determined
based on array analysis and used to constrain crust and upper mantle
velocity, anisotropy, attenuation, and density structure. Moreover, I
will show how both surface waves and deep-propagating body waves,
particularly core phases, can be extracted from seismic noise based on
seismic interferometry. The application of seismic tomography and
interferometry using USArray and various other regional arrays will be
discussed, which reveals detailed earth structure that can be associated
with surface geological features, plate tectonics, and core formation.

Andy Frassetto (andyf<at>iris.edu) can be contacted with any inquiries.

System Requirements
PC-based attendees
Required: Windows® 7, 8, Vista, XP or 2003 Server
Macintosh®-based attendees
Required: Mac OS® X 10.5 or newer

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