A large explosion or shock in the air may excite ground motion that can be observed by seismometers. For example, early U.S. nuclear tests in the atmosphere were detected by seismometers of the USSR Academy of Sciences (Cherepanov, 1996), and a broadband seismometer recorded a terrorist bomb attack in Kenya (Koper et al., 1999). Ground motions excited by shock waves from a meteorite and space shuttle were recorded in Japan and California, respectively (Nagasawa and Miura, 1987; Ishihara et al., 2001; Kanamori et al., 1991).

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An accidental explosion occurred...

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