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Browse MARGINS Awards in reverse chronological order after start date (most recent first):

Collaborative Research: Imaging the Seismogenic Zone with Geodesy and Seismology: Two Land Ocean Transects Across Costa Rica and the Middle America Trench

MARGINS Focus Area Subduction Factory, Seismogenic Zone
NSF Org OCE
Latest Amendment Date May 7, 2001
Award Number 9910609
Award Instrument Standard Grant
Program Manager Bilal U. Haq
OCE DIVISION OF OCEAN SCIENCES
GEO DIRECTORATE FOR GEOSCIENCES
Start Date August 1, 1999
Expires July 31, 2002 (Estimated)
Expected Total Amount $362,697 (Estimated)
Investigator Susan Y. Schwartz (Principal Investigator current)
Sponsor U of Cal Santa Cruz
1156 High Street
Santa Cruz, CA 95064
NSF Program 1620 MARINE GEOLOGY AND GEOPHYSICS
Field Application 0204000 Oceanography
Abstract Funds are being provided for a three year, multi-institutional, two-transect, geodetic and seismic experiment across the Middle America Trench and Costa Rica, immediately above the seismogenic interface between subducting Cocos and overriding Caribbean plates. The PIs will operate GPS, leveling, and digitally recording seismometers on land and deploy ocean bottom seismometers (OBSs) offshore. The goal is to map the three-dimensional distribution and nature of the seismogenic zone, the locked or the partly locked plate interface that generates large earthquakes, for comparison to processes that control the distribution of seismicity and plate coupling. The imaging of the seismogenic zone will be enhanced in the Nicoya and Osa peninsular region because of the close approach of local coastline to the trench axis where the large earthquakes are generated.