Recurrence of Deep Long-Period Earthquakes beneath the Klyuchevskoi Volcano Group, Kamchatka

Deep long-period earthquakes beneath the Klyuchevskoi Volcano Group in Kamchatka do not follow the typical Gutenberg-Richter power-law distribution seen in tectonic seismicity, instead resembling normal or gamma distributions with characteristic mean values. This suggests a distinct seismic mechanism linked to deep magmatic and hydrothermal systems at the crust-mantle boundary, potentially serving as an early precursor to volcanic eruptions. Researchers analyzed over 40,000 events recorded between 2011–2012 using matched-filter processing of seismograms and moment magnitude scaling, providing new insights into the recurrence patterns of these deep volcanic earthquakes.

Galina, N. A., Shapiro, N. M., Droznin, D. V., Droznina, S. Ya., Senyukov, S. L., & Chebrov, D. V. (2020). Recurrence of Deep Long-Period Earthquakes beneath the Klyuchevskoi Volcano Group, Kamchatka. Izvestiya, Physics of the Solid Earth, 56(6), 749–761. https://doi.org/10.1134/s1069351320060026