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Metadata
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ID
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T-1-98-PS
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Also Known As
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T-2-98-PS
T-3-98-PS
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Abstract
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Chief Scientist: Mike Fisher. Land-based and Multichannel
Seismic data (YoNav, airgun, 96channel, GPS,
bottomseismometer, integratednavigation) of field activity
T-1-98-PS in Puget Sound, Washington from 03/10/1998 to
03/24/1998
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Project/Theme
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Seismic Hazards Investigation in Puget Sound (SHIPS)
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National Plan
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Earthquake Hazards
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Chief Scientist
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Mike Fisher
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Activity Type
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Land-based and Multichannel Seismic
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Platform
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Thomas G. Thompson
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Area of Operation
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Puget Sound, Washington
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Location map
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Bounding Coordinates
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49.91054
-125.04557 -122.21873
47.11676
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Ports
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leave UW Seattle, WA
arrive UW Seattle, WA
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Dates
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03/10/1998 (JD 069) to 03/24/1998 (JD 083)
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Analog Materials
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list
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Index map
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Information Specialist
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Crew
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Mike Fisher
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Chief Scientist, USGS Western Region
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Alan Cooper
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Geologist, USGS Western Region
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Jon Childs
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Geophysicist, USGS Western Region
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Guy Cochrane
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Geophysicist, USGS Western Region
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Mike Hamer
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Data Technician, USGS Western Region
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Kevin O'Toole
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Marine Tech, USGS Western Region
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Gerry O'Brien
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Marine Tech, USGS Western Region
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Walt Olsen
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Marine Tech, USGS Western Region
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Hal Williams
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Marine Tech, USGS Western Region
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Dave Hogg
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Electronic Tech, USGS Western Region
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Bill Robinson
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Electronic Engineer, USGS Western Region
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Darcy Bristow
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Unspecified, Cascadia Research
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John Calambokidis
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Unspecified, Cascadia Research
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Satinder Chopra
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Unspecified, Geol Survey Of Canada
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Annie Douglass
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Unspecified, Cascadia Research
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R. Michael Grogan
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Unspecified, Univ Of Washington
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Diane Lambourn
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Unspecified, Cascadia Research
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William Martin
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Unspecified, Univ Of Washington
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Jen Quan
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Unspecified, Cascadia Research
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Lisa Schlenter
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Unspecified, Cascadia Research
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Steve Osmek
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Unspecified
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Al McClenaghan
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Master
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Equipment Used
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YoNav
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airgun
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96channel
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GPS
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bottomseismometer
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integratednavigation
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Notes
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See also T-2-98-PS (Tully) & T-3-98-PS (land)
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From February 27, 1998 Coastal and Marine Geology Bulletin
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SHIPS IS ON ITS WAY!
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Late this past week 5 48-foot trucks and some smaller cargo carriers left Marfac
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loaded with compressors, generators, airguns, and myriad
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other gear, all of which is destined for the SHIPS program in Seattle. Another
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truck left Texas with the 50-ton multichannel streamer. If all
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goes well, nearly 100 tons of mechanical and electrical equipment will be
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installed on the University of Washington's 275-foot research
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vessel, Thomas G. Thompson. This ship will be joined by the 240-foot Canadian
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research ship, John P. Tully, and the two ships will conduct
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intricate seismic experiments in the Puget Sound region. While airguns are
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discharged behind the Thompson, the resulting seismic waves
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will be recorded by the Tully as well as by 250 temporary seismometers that will
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be scattered around the region. About 50 fixed earthquake
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seismometers will also record these data. This survey is the most complex ever
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mounted by the USGS to investigate earthquake hazards in an
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urban setting. Cooperating institutions include the U.S. and Canadian Geological
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Surveys and six universities. The US Navy lent us critical
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infra-red gear, which was almost diverted to the Iraq conflict, and MMS
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contributed funds toward studying marine mammals. Funding comes
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almost entirely from within the USGS; the external NEHRP, Urban Hazards, and the
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Coastal and Marine Programs all contributed. Coastal and
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Marine has the honor of having chipped in the greatest share. Permission to use
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airguns in Puget Sound and the Straits of Juan de Fuca and
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Georgia, which are home to many marine mammals, took almost a year to obtain.
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Part of the stipulations in the permit are that when the
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airguns are operating, marine mammal biologists must remain vigilant aboard both
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survey ships and aboard an aircraft. Eleven biologists will
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work closely with geologists to obtain seismic data while minimizing harm to
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marine life. These biologists have responsibility for shutting
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off the array whenever a marine mammal enters a specific zone around the airguns
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where it might suffer hearing damage. The size of the
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protective zone varies with mammal species, hence the need for expert
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assistance. With close cooperation, we will obtain three-dimensional
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seismic data and information on the behavior of marine mammals in response to
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airgun signals. The data about mammals will help us and
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other groups plan the next airgun surveys; the seismic data will help city
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planners allocate scarce funds for seismic strengthening of
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important infrastructure. Crew from Marfac CMG and EQ leave early next week.
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Mike Fisher
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Got Help?
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For T-1-98-PS, we would appreciate any information on -- contract, days at sea, dive count, funding, information to be derived, kms of navigation, NGDC Info, organization, owner, project number, publications, purpose, scanned materials, seismic description, station count, station description, submersible, summary, tabulated info.
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