RESEARCH IN SEISMOLOGY
Research in seismology on fundamental problems related to the detection, location and identification of underground explosions is described. Work in progress pertains to studies of (1) long period P-wave amplitude anomalies at the Montana LASA, (2) determination of anomalous structure (in Fennoscand...
Main Authors: | , , , |
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Other Authors: | |
Format: | Text |
Language: | English |
Published: |
1968
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Online Access: | http://www.dtic.mil/docs/citations/AD0684172 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0684172 |
Summary: | Research in seismology on fundamental problems related to the detection, location and identification of underground explosions is described. Work in progress pertains to studies of (1) long period P-wave amplitude anomalies at the Montana LASA, (2) determination of anomalous structure (in Fennoscandia) by use of first derivatives of P-wave travel times, (3) crust and mantle S-wave velocity distribution and its regional variations, (4) a new method of earthquake energy determination, (5) the effect of focal depth on the spectrum of body waves, and (6) the frequency dependence of transmission through a layer over a half-space examined by modeling seismology techniques. Completed research is summarized and has investigated (1) Love and Rayleigh wave phase velocities over U. S. continental paths, (2) decoupling and source function for explosions in a three-dimensional model, and (3) exact solutions for the displacement components in head waves due to an impulsive double couple source. See also AD0640637. Sponsored in part by the DARPA. |
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