Engineering topics
Publications and source records attributed to Donnellan, A..
During the 1998-1999 Antarctic field season, we installed three autonomous GPS stations in Marie Byrd Land, West Antarctica to measure glacio-isostatic rebound and rates of spreading across the West Antartic Rift System.
The M7.1 Hector Mine earthquake ruptured the Lavic Lake fault near Twentynine Palms, CA at 09:46 UTC October 16, 1999.
GPS observations in Costa Rica from 1994-1997 reveal a complex pattern of motion consistent with the superposition of seismic cycle and secular plate margin deformation.
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Explore the source record for details and available documents.
Global Positioning System (GPS) observations indicate that significant aseismic deformation occurred in the year following the January 17, 1994 Northridge earthquake.
geodetic observations indicate that significant aseismic deformation occurred folowing the January 17, 1994 Northridge earthquake.
Geodetic observations of the January 29, 1994 M 5.1 aftershock to the Northridge earthquake are consistent with seismic solutions showing left-lateral oblique slip on a northeast-southwest striking steeply dipping fault.
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The Jet Propulsion Laboratory (JPL) and other institutions under the umbrella of the Southern California Earthquake Center (SCEC) are implementing a continuously operating dense GPS array in greater Los Angeles to measure movement along fault lines.
Measurement of postseismic deformation following the 1994 M 6.7 Northridge earthquake indicates continued shortening of the region since the earthquake with motion slowing over a an exponential time scale of 3 years. Afterslip best explains the data, but that is still being tested.
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Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
GPS measurements indicate that during the peiod 1987-1992 Ventura basin shortened at a rate of 7+-2 mm/yr with the highest strain concentration occurring in the Fillmore/Santa Paula area.
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The most damaging earthquake in the United States since 1906 struck northern Los Angeles on January 17.1994. The magnitude 6.7 Northridge earthquake produced a maximum of more than 3 meters of reverse (up-dip) slip on a south-dipping thrust fault rooted under the San Fernando Valley and projecting north under the Santa Susana Mountains.