NSF Org:	EAR Division Of Earth Sciences
Recipient:	UNIVERSITY OF CALIFORNIA SAN DIEGO
Initial Amendment Date:	May 7, 2007
Latest Amendment Date:	May 7, 2007
Award Number:	0642546
Award Instrument:	Standard Grant
Program Manager:	Lina Patino lpatino@nsf.gov  (703)292-5047 EAR  Division Of Earth Sciences GEO  Directorate for Geosciences
Start Date:	October 1, 2007
End Date:	September 30, 2009 (Estimated)
Total Intended Award Amount:	$110,661.00
Total Awarded Amount to Date:	$110,661.00
Funds Obligated to Date:	FY 2007 = $110,661.00
History of Investigator:	Duncan Carr Agnew (Principal Investigator) dagnew@ucsd.edu
Recipient Sponsored Research Office:	University of California-San Diego Scripps Inst of Oceanography 8622 DISCOVERY WAY # 116 LA JOLLA CA  US  92093-1500 (858)534-1293
Sponsor Congressional District:	50
Primary Place of Performance:	University of California-San Diego Scripps Inst of Oceanography 8622 DISCOVERY WAY # 116 LA JOLLA CA  US  92093-1500
Primary Place of Performance Congressional District:	50
Unique Entity Identifier (UEI):	QJ8HMDK7MRM3
Parent UEI:	QJ8HMDK7MRM3
NSF Program(s):	EARTHSCOPE-SCIENCE UTILIZATION
Primary Program Source:	app-0107
Program Reference Code(s):	0000, OTHR
Program Element Code(s):	017F00
Award Agency Code:	4900
Fund Agency Code:	4900
Assistance Listing Number(s):	47.050

ABSTRACT

We are helping to develop a scientific community that uses data from the strainmeters in the Plate Boundary Observatory component of EarthScope. The available PBO borehole strainmeter data strongly suggests that the simple models available do not fit the known signals from the Earth tides. We are developing methods and tools for finding the instrument response, and providing the community with descriptions and methods that will allow users to interpret the data more straightforwardly than is now possible. We are testing models that use different input signals (tides, air pressure loading, and seismic waves), and are Developing mechanical models for the observed behavior of borehole strainmeters, particularly their response to applied strain, including distortions from topography, and from fracturing near the borehole. We are continuing to develop two software packages, one (PIASD) for the analysis of strainmeter data and the other (SPOTL) for computing of ocean tidal loading.

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