Effects of Seafloor Bathymetry on the Imaging of Magma      Chamber Reflectors
{'Code': '06040200', 'Directorate': {'Abbreviation': 'GEO', 'LongName': 'Directorate For Geosciences'}, 'Division': {'Abbreviation': 'OCE', 'LongName': 'Division Of Ocean Sciences'}}
{'SignBlockName': 'Bilal U. Haq', 'PO_EMAI': None, 'PO_PHON': None}
Mid-ocean ridges are the site of volcanic activity as the new                   ocean crust is generated.  An important question about this                     activity is whether as it ascends the magma collects in a chamber               below the axis of the ridge, and if so, what is the size and                    extent of the chamber.  Recent seismic data collected on the East               Pacific Rise show a reflector that has been interpreted as the                  top of a magma chamber.  This reflector is present on along-axis                and cross-axis profiles.  At locations where the ridge axis is                  relatively broad and flat the reflector is 3-4 km wide while in                 locations where the ridge axis is narrow and rough the reflector                is less than 1 km wide.  The objective of this project is to                    determine if the observed difference in the width of the                        reflector is due indeed to a difference in the width of the magma               chamber or might instead be due to refraction and diffraction of                the seismic energy by the seafloor.  The principal investigator                 will reanalyze the seismic data using a technique that can                      account for energy refractiona and diffraction at the seafloor.
{'FirstName': 'Alistair', 'LastName': 'Harding', 'PI_MID_INIT': 'J', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Alistair J Harding', 'EmailAddress': 'aharding@ucsd.edu', 'NSF_ID': '000444568', 'StartDate': '04/01/1989', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
{'Name': 'University of California-San Diego Scripps Inst of Oceanography', 'CityName': 'LA JOLLA', 'ZipCode': '920931500', 'PhoneNumber': '8585341293', 'StreetAddress': '8622 DISCOVERY WAY # 116', 'StreetAddress2': None, 'CountryName': 'United States', 'StateName': 'California', 'StateCode': 'CA', 'CONGRESSDISTRICT': '50', 'CONGRESS_DISTRICT_ORG': 'CA50', 'ORG_UEI_NUM': 'QJ8HMDK7MRM3', 'ORG_LGL_BUS_NAME': 'UNIVERSITY OF CALIFORNIA SAN DIEGO', 'ORG_PRNT_UEI_NUM': 'QJ8HMDK7MRM3'}
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{'Code': '1620', 'Text': 'Marine Geology and Geophysics'}
{'url': 'https://www.nsf.gov/awardsearch/download?DownloadFileName=1989&All=true', 'xml': '8900013.xml'}