Abstract
Long-period records of multiple Love waves from the 1957 earthquake in Mongolia (MS = 8.0) at Pasadena are analysed and compared to synthetic seismograms, generated by the method of Kanamori. A fit in the time domain shows that the records are not consistent with the previous solution, achieved through a frequency-domain analysis of directivity by Ben-Menahem and Toksöz. The solution asks for a shorter rupture of 270 km at a velocity of 3.5 km/s. The focal parameters are constrained by updating all the reported first motion and are found to be: strike = 103°, dip = 53°, slip = 32°. A seismic moment of 1.8 · 1028 dyn · cm is obtained. These figures are also consistent with a time-domain analysis of Love waves at Palisades and Strasbourg, and of Rayleigh waves at Pasadena, with a directivity study of Love waves at Pasadena, and with static deformation and isoseismal data. A discussion is given of the relation between moment, magnitude and rupture area, and a comparison is made with other events in the same region: it is concluded that this earthquake does not exhibit an "intra-plate" behavior, but rather compares better with "inter-plate" events, such as the great Assam earthquake.
Original language | English (US) |
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Pages (from-to) | 319-328 |
Number of pages | 10 |
Journal | Physics of the Earth and Planetary Interiors |
Volume | 12 |
Issue number | 4 |
DOIs | |
State | Published - Sep 1976 |
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Geophysics
- Physics and Astronomy (miscellaneous)
- Space and Planetary Science