Seismic excitation by the space shuttle Columbia

Details Seismic excitation by the space shuttle Columbia Seismic excitation by the space shuttle Columbia

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991natur.349..781k&link_type=abstract

Nature (ISSN 0028-0836), vol. 349, Feb. 28, 1991, p. 781, 782.

Physics

19

Earth Atmosphere, P Waves, Seismic Waves, Shock Waves, Sonic Booms, Space Shuttles, Energy Transfer, Mojave Desert (Ca), Wave Fronts

Scientific paper

Seismic stations in southern California recorded the atmospheric shock waves generated by the Space Shuttle Columbia on its return to the Edwards Air Force base on August 13, 1989. In addition to the shock wave, the broad-band IRIS-TERRAscope station at Pasadena recorded a distinct pulse with a period of about 2-3 seconds, which arrived 12.5 seconds before the shock wave. This pulse was also recorded near downtown Los Angeles, where it arrived 3 seconds after the shock wave. The origin of this pulse could not be readily identified. It is shown here that it was a seismic P wave excited by the motion of high-rise buildings in downtown Los Angeles, which were hit by the shock wave. The proximity of the natural period of the high-rise buildings to that of the Los Angeles basin enabled efficient energy transfer from shock wave to seismic wave.

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