HR: 14:25h
AN: G23A-04    [Abstracts]
TI: Current Status and Future Directives of the Nicoya Peninsula Continuous GPS Network, Costa Rica, In Regard to Slip Style and Distribution
AU: * Psencik, K C
EM: kpsencik@rsmas.miami.edu
AF: University of Miami-RSMAS, 4600 Rickenbaker Cswy, Miami, FL 33149, United States
AU: Jiang, Y
EM: yjiang@rsmas.miami.edu
AF: University of Miami-RSMAS, 4600 Rickenbaker Cswy, Miami, FL 33149, United States
AU: LaFemina, P C
EM: plafemina@geosc.psu.edu
AF: Penn State University, 406 Deike Building, University Park, PA 16802, United States
AU: Dixon, T H
EM: tdixon@rsmas.miami.edu
AF: University of Miami-RSMAS, 4600 Rickenbaker Cswy, Miami, FL 33149, United States
AU: Protti, M
EM: mprotti@una.ac.cr
AF: OVSICORI-UNA, Apartado Postal: 2346-3000, Heredia, 2346-3000, Costa Rica
AU: Gonzalez, V
EM: vgonzalez@una.ac.cr
AF: OVSICORI-UNA, Apartado Postal: 2346-3000, Heredia, 2346-3000, Costa Rica
AU: Sklar, J
EM: sklar@unavco.org
AF: UNAVCO, 6350 Nautilus Drive, Boulder, CO 80301-5554, United States
AU: Blume, F
EM: blume@unavco.org
AF: UNAVCO, 6350 Nautilus Drive, Boulder, CO 80301-5554, United States
AB: The close proximity of the Nicoya Peninsula land mass to the Cocos-Caribbean subduction zone plate boundary makes it a prime location to use GPS to study such plate boundary processes as locking zone dynamics and episodic tremor and slip events. Nicoya Peninsula currently has 12 continuous GPS (CGPS) stations installed each with varying degrees of equipment and communication. Seven of these sites are currently installed with Trimble NetRS receivers and five with Trimble 5700 receivers. Of these 12 sites, four are equipped with SIM cards and modems for direct download capabilities, one of which is connected to a router for direct internet access. This site, LIMO, located in Limonal, is being monitored on the PBO network by UNAVCO with all of the quality and systems checks that this implies. The other eight sites currently require manual download. All sites with NetRS receivers are currently partitioned to record both 5Hz and 30 second position data. We will present the first years time series from these stations. The advantage to recording at a 5 Hz interval is that the receivers may be used to record long period dynamic events during large earthquakes along the Cocos-Caribbean plate boundary. One goal of the network is to investigate episodic tremor and slip events, as have been observed in the Cascadia subduction boundary. Such events have been speculated upon in this region, however due to the sparse network at that time, we were unable to resolve the event. With the expanded network of CGPS stations, we hope to better record and understand such events. We will also present an anlaysis of synthetic data to assess the spacial resolution of detectable slip patterns with the current network spacing. There is a future plan of three more installations on the interior of the peninsula to further optimize the network for seismic and locking pattern studies.
DE: 1294 Instruments and techniques
DE: 1299 General or miscellaneous (1709)
DE: 7294 Seismic instruments and networks (0935, 3025)
DE: 7299 General or miscellaneous
SC: Geodesy [G]
MN: 2007 Fall Meeting