[unav_all] IRIS Seismology Webinar - Under the Sea: Ocean Bottom Seismology for Landlubbers

Andy Frassetto andyf at iris.edu
Fri Mar 8 12:43:46 MST 2013

The next IRIS-sponsored webinar will present "Under the Sea: Ocean 
Bottom Seismology for Landlubbers" on Wednesday March 13, 2013 from 3-4 
pm EDT.

Register to attend, here: 
https://www2.gotomeeting.com/register/283212282. You will then receive a 
confirmation email containing information about joining the webinar. The 
presentation and subsequent Q&A session with the speaker will be 
recorded and available for viewing within a few days. More information 
on IRIS webinars, including links to previously recorded presentations 
and related materials, may be found here: http://www.iris.edu/hq/webinar/

Presenter: Dr. Doug Wiens, Washington University in St. Louis - 
Department of Earth and Planetary Sciences

Summary: Seismological instrumentation has traditionally been restricted 
to the 30% of the Earth’s surface that lies above sea level. 
Technological advances over the last several decades now allow retrieval 
of passive seismic data from the seafloor using ocean bottom 
seismographs (OBS). However, the ocean bottom environment presents 
additional challenges for seismic data collection and analysis, 
including limitations on recording duration, different noise 
characteristics, siting and instrument orientation issues, and timing 

In this webinar, I will briefly describe OBS instrumentation and discuss 
how we attempt to mitigate some of the difficulties in collecting high 
quality passive seismic data in the oceans. I will describe the basic 
steps needed to design, propose and carry out an OBS deployment using 
the US National OBS Instrumentation Pool, now managed by IRIS with NSF 
funding. The application of traditional seismic analysis methods, such 
as surface and body wave tomography, noise correlation, receiver 
functions, and shear wave splitting to OBS data will be discussed. 
Finally I will close by showing results from ocean bottom seismograph 
experiments for several different environments, including mid-ocean 
ridges, transform faults, and subduction zones.

You may contact Andy Frassetto (andyf at iris.edu) with any related 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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