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Variations of Seismicity in the Avachinsky Gulf (Kamchatka, Russia)

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  • V. Saltykov
  • V. Chebrov
  • J. Kugaenko

Abstract

Variations of seismic mode in the region of the Avachinsky Gulf (Kamchatka, Russia) are considered. Observed anomalies (seismic quiescence, the ring seismicity, reduction of the slope of the earthquake recurrence diagram) provide a basis to consider this region as a place of strong earthquake preparation. The Kamchatka regional catalogues of earthquakes between 1962–1995 were used in the analysis. A reduced seismicity rate is observed during 10 years in an area of 150 km × 60 km in size. During the last five years, in the vicinity of the area considered, earthquakes with M > 5 occurred three times more often than the average over thirty years. It is interpreted as ring seismicity. The block of 220 km × 220~km in size, including the quiescence zone, is characterized by a continuous decrease of the recurrence diagram slope, which has reached a minimum value for the last 33 years in this region. Copyright Kluwer Academic Publishers 1999

Suggested Citation

  • V. Saltykov & V. Chebrov & J. Kugaenko, 1999. "Variations of Seismicity in the Avachinsky Gulf (Kamchatka, Russia)," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 19(2), pages 87-96, May.
    • Handle: RePEc:spr:nathaz:v:19:y:1999:i:2:p:87-96
    DOI: 10.1023/A:1008188019025
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