Stacking for the frequencies and Qs of 0S0 and 1S0

Citation:
Riedesel, MA, Agnew D, Berger J, Gilbert F.  1980.  Stacking for the frequencies and Qs of 0S0 and 1S0. Geophysical Journal International. 62:457-471.

Date Published:

August 1, 1980

Abstract:

Using nine IDA records for the Indonesian earthquake of 1977 August 19, we have formed an optimal linear combination of the records and have measured the frequency and Q of 0S0 and 1S0. The frequency was measured using the moment ratio method. The attenuation was measured by the minimum width method and by the time-lapse method. The frequency and attenuation were measured simultaneously by varying them to obtain a best fit to the data. A 2000-hr stack, the sum of nine individual records, for 0S0 gave a frequency of 0.814664 mHz±4 ppm. The values for the Q of 0S0 for the three different methods of measurement were 5600,5833 and 5700, respectively. The error in the estimates of Q-1 is about 5 per cent for the minimum power method. For 1S0 a 300-hr stack yielded a frequency of 1.63151 mHz±30 ppm. The values of Q for this mode were 1960, 1800 and 1850, respectively, with an error in Q-1 of about 12 per cent for the minimum power method.

Notes:

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Website

DOI:

10.1111/j.1365-246X.1980.tb04867.x