Structure of volatile conduits beneath gorely volcano (Kamchatka) revealed by local earthquake tomography

Pavel Y. Kuznetsov, Ivan Koulakov, Andrey Jakovlev, Ilyas Abkadyrov, Evgeny Deev, Evgeny I. Gordeev, Sergey Senyukov, Sami El Khrepy, Nassir Al Arifi

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12 Citations (Scopus)


Gorely is an active volcano located 75 km from Petropavlovsk-Kamchatsky, Kamchatka. In 2010-2015, it exhibited strong activity expressed by anomalously high gas emission. In 2013-2014, we deployed a temporary network consisting of 20 temporary seismic stations that operated for one year. We selected 333 events with 1613 P-wave and 2421 S-wave arrival times to build the first tomographic model of this volcano. The seismic model was carefully verified using a series of synthetic tests. Our tomographic model provides a mechanism for volatile feeding of Gorely. An unexpected feature of the model was low Vp/Vs ratios, below 1.4 in some parts. One reason for such low Vp/Vs ratios is gas contamination due to magma degassing. In the central part of the model, directly underneath the Gorely crater, we observe a 2.5 km wide and 1.5 km thick seismic anomaly with a very high Vp/Vs ratio of up to 2. This may represent a magma reservoir with a high melt and/or volatile content. The upper limit of this anomaly, 2.5 km below the surface, may indicate the degassing level, which coincides with the most intense seismicity. Below this reservoir, we observe another columnar high Vp/Vs ratio anomaly. This can be interpreted as a conduit bringing magma and fluids from deeper sources.

Original languageEnglish
Article number111
Number of pages16
JournalGeosciences (Switzerland)
Issue number4
Publication statusPublished - 1 Dec 2017


  • Degassing
  • Gas contamination
  • Gorely volcano
  • Magma reservoir
  • Travel-time tomography
  • degassing
  • magma reservoir
  • travel-time tomography
  • gas contamination


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