In:
Geodynamics & Tectonophysics, Institute of Earth's Crust, Siberian Branch of the Russian Academy of Sciences, Vol. 13, No. 3 ( 2022-09-21)
Abstract:
A spatial distribution of methane dissolved in sea water is a critical but poorly understood factor in the context of seismic activity. Based on the results of the RV AKADEMIK OPARIN integrated geological-geophysical expedition (September 21 – October 31, 2017), this paper deals with the regularities of methane concentration variability in the surface layer of the Sea of Japan: the average growth and the average growth period were 70 % and 10 h, respectively, after each earthquake whereas a decrease in methane concentration in the sea water was 10–30 % 2–4 h before a seismic event. A decrease in methane concentration occurs irrespectively of the depth of an earthquake. The results obtained show good agreement with the published data and gaseous-geochemical monitoring materials, thus making it possible to associate seismic-related gaseous-geochemical regime not only with gas-saturated sediments but also with the water column of the Japan Basin (Sea of Japan).
Type of Medium:
Online Resource
ISSN:
2078-502X
DOI:
10.5800/GT-2022-13-3-0642
Language:
Unknown
Publisher:
Institute of Earth's Crust, Siberian Branch of the Russian Academy of Sciences
Publication Date:
2022
detail.hit.zdb_id:
2552346-6
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