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UNAVCO earthscope.orgPlate Boundary Observatory (PBO): Supporting Geodetic, Seismic, and Tectonic Research

The Plate Boundary Observatory (PBO), part of the EarthScope project that is funded by the National Science Foundation, studies the three-dimensional strain field resulting from active plate boundary deformation across the Western United States.

From a science perspective the PBO component of EarthScope is a geodetic observatory designed to study the three-dimensional strain field resulting from deformation across the active boundary zone between the Pacific and North American plates in the western United States. The observatory consists of arrays of Global Positioning System (GPS) receivers and Strainmeters which will be used to deduce the strain field on timescales of days to decades and geologic and paleoseismic investigations to examine the strain field over longer time scales.

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Graphic: PBO At Work Education and Outreach Education and Outreach Data Access Strainmeter Operations GPS Operations

Photo:Shear strain recorded by PBO borehole strainmeters on the Olympic Pennisula and Vancouver Island.  Blue traces have trend removed, red traces have trend, tides, and barometric pressure removed.  (A) May 5, 2008, Jenny Hanna of UW reports 15 or more hours of tremor per day for three days.  (B) May 13, 2008, Herb Dragert from PGC reports significant displacements are taking place at north-western Washington sites, http://www.pnsn.org/WEBICORDER/DEEPTREM/winter2008.html.
2008 Cascadia Episodic Tremor and Slip Event
May 14, 2008
Photo:Figure 1. Shaded relief map of Augustine volcano showing locations of GPS stations (blue points). Earthquake locations (red points) during September 2005 to January 2006 are also reported.
2005-2006 Mt. Augustine (Alaska, USA) Eruption Studied with high-rate GPS Data
Apr 18, 2008
Photo:Jayme Margolin speaks to a full house at San Diego State University in Brawley, California about the data collected from the GPS monuments in the region.
PBO Siting Outreach Talk at San Diego State University in Brawley, California
Mar 11, 2008
Photo:PBO borehole strainmeter data recorded around the time of the Wells earthquake
PBO Instruments Record Wells NV, Event
Mar 10, 2008

BSM: Photo Pending

4Char: B019
Region: BSM
Date: May 12, 2008
GPS: Photo Pending

4Char: P739
Region: PNW
Date: May 09, 2008
Photo: P177 -  CoDeTierraCN2008

4Char: P177
Region: NCAL
Date: May 08, 2008
Photo: P327 -  Dinsmore__CN2008

4Char: P327
Region: NCAL
Date: Apr 30, 2008
Photo: P783 -  Wanship2__UT2008

4Char: P783
Region: BR
Date: Apr 29, 2008

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Plotting/Data Access Resources
  » BSM Data
  » SQUID
  » GPS Data (Single Chart)
  » GPS Data (Multi Chart)

Mapping Resources
  » PBO Network Maps
  » Network Progress (Static)
  » Network Progress (KMZ)
  » Velocity Field (KMZ)
  » Other Google Earth Resources
  » GPS Station Coordinates (CSV)
  » BSM Station Coordinates (CSV)
  » Nucleus Coordinates (CSV)

Other resources
  » Network QC Statistics

Station Homepages

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Page Last Modified: Friday, February 29, 2008 09:33:37 MST