Accession Number : ADA258536


Title :   Crustal Deformation Measurements in the Vicinity of Vandenberg Air Force Base.


Descriptive Note : Annual technical rept. 1 Jan 1991-30 Sep 1992,


Corporate Author : AIR FORCE OFFICE OF SCIENTIFIC RESEARCH BOLLING AFB DC


Personal Author(s) : King, Robert W


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a258536.pdf


Report Date : 01 Dec 1992


Pagination or Media Count : 5


Abstract : Recent geological and geodetic studies have suggested that the region surrounding Vandenberg AFB is undergoing active crustal deformation, with important implications for both the geodetic stability and the seismogenic potential of the Western Test Range (WTR). Part of the evidence for significant deformation was obtained from GPS measurements which we carried out in cooperation with other university and government scientists beginning in 1986. These measurements have been made annually over a broad region of central and southern California but are of insufficient spatial and temporal density to answer many questions about the seismogenic potential of Vandenberg. In March 1992 we remeasured the relative positions of the Vandenberg network stations occupied in our experiments of February and September 1990, and also established nine new stations to density the network. The Vandenberg PGGA station has been acquiring data almost continuously since 22 May 1992, and provided an important anchor site for measuring far-field displacements from the Landers (MW7.3) and Big Bear (MW6.2) earthquakes of 28 June.


Descriptors :   *MEASUREMENT , *EARTHQUAKES , STATIONS , STABILITY , DEFORMATION , SITES , REGIONS , SCIENTISTS , COOPERATION , CALIFORNIA , FAR FIELD , DISPLACEMENT , NETWORKS , DENSITY


Subject Categories : Seismology


Distribution Statement : APPROVED FOR PUBLIC RELEASE