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Journal of Volcanology and Seismology

, Volume 6, Issue 5, pp 316–328 | Cite as

On the relationships of water-level variations in the E-1 well, Kamchatka to the 2008–2009 resumption of activity on Koryakskii volcano and to large (M ≥ 5) earthquakes

  • G. N. KopylovaEmail author
  • S. V. Boldina
Article

Abstract

We discuss the water-level variations in the E-1 well for the time period between May 2006 and 2010, inclusive. A trend towards an increasing level at an abnormally high rate occurred from mid-2006 to December 2009. This increase is regarded as the response of the aquifer of gas-saturated ground water that exists in the volcanogenic-sedimentary deposits of the Avacha volcano-tectonic depression to volumetric compression strain changes during the precursory period and the occurrence of a swarm of small earthquakes \(\left( {K_{S_{\max } } = 8.3} \right)\) in the area of Koryakskii Volcano and to its phreatic eruption. We estimated the volumetric compression as Δɛ = −(4.1 × 10−6−1.5 × 10−5) from the amplitude of water-level rise using the elastic parameters of the water-saturated rocks. While the strain source was active, we observed a decreasing sensitivity of the hydrodynamic regime in the well to the precursory processes before large (M ≥ 5.0) tectonic earthquakes.

Keywords

Wellbore Earth Quake Earthquake Swarm Water Level Change Water Level Rise 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Pleiades Publishing, Ltd. 2012

Authors and Affiliations

  1. 1.Kamchatka Branch, Geophysical ServiceRussian Academy of SciencesPetropavlovsk-KamchatskiiRussia

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