Open AccessThe seismic disturbance of 1976 March 20, elast Kazakhstan: earthquake or explosions?
Author(s) -
Pooley C.I.,
Douglas A.,
Pearce R. G.
Publication year - 1983
Publication title -
geophysical journal of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0016-8009
DOI - 10.1111/j.1365-246x.1983.tb01893.x
Subject(s) - disturbance (geology) , seismogram , seismology , geology , crust , seismic microzonation , seismic zone , geophysics , induced seismicity , paleontology
Summary. On 1976 March 20 a seismic disturbance took place near an explosion test‐site in East Kazakhstan, USSR: on the m b : M s criterion this disturbance is identified as an earthquake. However, it has been suggested that the source may have been one or more explosions. It is shown here that the polarities and relative amplitudes of the main arrivals on the short‐period P‐ wave seismograms of the disturbance can be accounted for by assuming the source was an earthquake in a crust with some lateral variation in structure. There is no evidence that the disturbance was anything other than a single earthquake.