Abstract
The average relationship is established between the basic magnitude for the Kamchatka regional catalog, M L , and modern moment magnitude Mw. The latter is firmly tied to the value of the source seismic moment M0 which has a direct physical meaning. M L magnitude is not self-reliant but is obtained through the conversion of the traditional Fedotov’s S-wave energy class, K F68S1,2 . Installation of the digital seismographic network in Kamchatka in 2006–2010 permitted mass estimates of M0 and Mw to be obtained from the regional data. In this paper we outline a number of techniques to estimate M0 for the Kamchatka earthquakes using the waveforms of regional stations, and then compare the obtained Mw estimates with each other and with M L , based on several hundred earthquakes that took place in 2010–2014. On the average, for Mw = 3.0–6.0, Mw = M L –0.40; this relationship allows obtaining Mw estimates (proxy-Mw) for a large part of the regional earthquake catalog with M L = 3.4–6.4 (Mw = 3.0–6.0).
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Original Russian Text © I.R. Abubakirov, A.A. Gusev, E.M. Guseva, V.M. Pavlov, A.A. Skorkina, 2018, published in Fizika Zemli, 2018, No. 1, pp. 37–51.
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Abubakirov, I.R., Gusev, A.A., Guseva, E.M. et al. Mass determination of moment magnitudes Mw and establishing the relationship between Mw and M L for moderate and small Kamchatka earthquakes. Izv., Phys. Solid Earth 54, 33–47 (2018). https://doi.org/10.1134/S1069351318010019
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DOI: https://doi.org/10.1134/S1069351318010019