GEOS Home Page

Data Projects

Many of these studies have been released as USGS Open-File Reports.

Tables of station locations, event locations, ordered arrival lists, and trigger tables are available below. As the complete Open-File Reports become available on-line they will be shown below in bold face. The size of data available via FTP is shown in green. Prior to 1983 recordings in this project were collected using Sprengnether DR100 digital event recorders. Beginning in 2008 San Francisco Array data have been supplemented with Kinemetrics Dolomite recorders.

The digital recordings are available via anonymous FTP.

Active Integrated Arrays

• PRK - 1984-2012 Parkfield, California [626Mb]
  
• SFA - 1993-2012 Integrated Surface and Borehole Geotechnical Strong-Motion Arrays in San Francisco, California [2544Mb]
  

  Aftershock Studies

• ORV - 1975 Oroville, California DR100 [10.3Mb]
  
• COY - 1979 Coyote Lake, California DR100 [27.0Mb]
  
• IMP - 1979 Imperial Valley, California DR100 [16.3Mb]
  
• MAM80 - 1980 Mammoth Lakes, California DR100 [79.9Mb]
  
• NBK82 - 1982 Miramichi, New Brunswick, Canada (Open-File Report 82-777) DR100 [1.1Mb]
  
  
• CLG - 1983 Coalinga, California (Open-File Report 84-697) [44.2Mb]
  
• MAM83 - 1983 Mammoth Lakes, California [25.2Mb]
  
• IDO - 1983 Borah Peak, Idaho (Open-File Report 85-290) [30.6Mb]
  
• MGH - 1984 Morgan Hill, California [105.8Mb]
  
• CHL - 1985 Chili [141.1Mb]
  
• MEX - 1985 Mexico City, Mexico [30.9Mb]
  
• CLV - 1986 Painesville, Ohio (Cleveland) (Open-File Report 86-181) [2.4Mb]
  
• PLM - 1986 North Palm Springs, California [87.1Mb]
  
• WNE - 1987 Whittier Narrows, California (Open-File Report 88-688) [138.6Mb]
  
• SUP - 1987 Superstition Hills, California (Open-File Report 88-700) [139.5Mb]
  
• PERU - 1988 Peru [33.0Mb]
  
• ARM - 1988 Spitak, Armenia (Leninakan) (Open-File Report 89-163) [120.9Mb]
  
• LPE - 1989 Loma Prieta, California (Open-File Report 90-503) [214.1Mb]
  
• UPL - 1990 Upland, California (Open-File Report 91-47) [53.2Mb]
  
• PHIL - 1990 Phillipines [71.8Mb]
  
• SRM - 1991 Sierra Madre, California [1.3Mb]
  
• PET - 1992 Petrolia, California (Cape Mendocino) [75.7Mb] + DR200 [17.6Mb]
  
• ERZ - 1992 Erzincan, Turkey [5.0Mb]
  
• JOS - 1992 Joshua Tree, California
  
• LBB - 1992 Landers / Big Bear, California [509.9Mb]
  
• ORG - 1993 Scott's Mills, Oregon [19.4Mb]
  
• KLA - 1993 Klamath Falls, Oregon [70.9Mb]
  
• EVY - 1993 Eureka Valley, California [18.7Mb]
  
• NRG - 1994 Northridge, California [464.5Mb]
  
• RDG - 1995 Ridgecrest, California
  
• IZM - 1999 Izmit, Turkey
  

  Long Term Deployments

• DIL - 1984-1999 Dilatometer (Open-File Report 89-349) [744Mb]
  
• GARNI - 1990-1993 3-D Array, Garni, Armenia (Open-File Report 93-216) [304Mb]
  

  Short Term Experiments

• PERM - Permanente Rock Quarry, Cupertino, California (Open-File Report 86-330)
  
• MCGEE - 1984 and 1986 McGee Creek, California, Downhole Experiment [60.7Mb]
  
• PACE - 1985 Pacific - Arizona Crustal Experiment (Open-File Report 86-387) [50.9Mb]
  
• PASSCAL - 1986 Northern Nevada Lithospheric Experiments (NNLE) - PassCal (Open-File Report 87-326)
  
• HAWAII - Hawaii (Open-File Report 89-113)
  
• MBL - 1993-1994 Monterey Bay Liquefaction Experiment, California [32.9Mb]
  
• LARSE - 1994 Los Angeles Region Seismic Experiment, California (Open-File Report 96-536) [1.8Mb]
  
• OKDEM - 1995 Alfred P. Murrah Federal Building Demolition, Oklahoma City, Oklahoma (Open-File Report 95-594) [1.0Mb]
  

Presentations

• Earthquake Ground Shaking and its Potential Effects in the San Francisco Bay Region for a Repeat of the Great 1906 Earthquake
  presented by Roger D. Borcherdt, Gary Glassmoyer, and Carl Wentworth.
  [An automatically advancing slide show with 41 slides; 1.8Mb without narration, 8.8Mb with narration]
  

• Integrated Strong-Motion, Soil-Response Arrays in San Francisco, California
  by R. D. Borcherdt, H. -P. Liu, R. E. Warrick, R. E. Westerlund, and J. F. Gibbs.
  
  
  Open in this window with small figures [444Kb] (for horizontal resolutions less than 1024).
  Open in this window with full-size figures [1196Kb] (for horizontal resolutions of at least 1024).

References

• Borcherdt, R. D., J. P. Fletcher, E. G. Jensen, G. L. Maxwell, J. R. VanSchaak, R. E. Warrick, E. Cranswick, M. J. S. Johnston, and R. McClearn (1985). A General Earthquake Observation System (GEOS), Bull. Seism. Soc. Am. 75, 1783-1825.

• Borcherdt, Roger D., Malcolm J. S. Johnston, Gary Glassmoyer, and Christopher Dietel (2006). Recordings of the 2004 Parkfield Earthquake on the General Earthquake Observation System Array: Implications for Earthquake Precursors, Fault Rupture, and Coseismic Strain Changes, Bull. Seism. Soc. Am. 96, 4B, S73-S89.

• USGS Open-File Reports.

The USGS Home Page is at http://www.usgs.gov
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The USGS National Strong Motion Program Home Page is at http://earthquake.usgs.gov/monitoring/nsmp

The URL of this page is /GEOS/geos.html
e-mail: glassmoyer@usgs.gov
or address:
Gary Glassmoyer
345 Middlefield Road M/S 977
Menlo Park, California 94025

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