BUILDING A TOMOGRAPHIC VELOCITY MODEL FOR SAMOYLOV ISLAND AREA (LENA DELTA) FROM LOCAL SEISMOLOGICAL DATA FOR THE PERIOD OF 2019–2021

In our paper we present the results of seismotomographic inversion for the local seismological monitoring data obtained in the area of the Samoylov Island (Lena River delta) in 2019–2021. Tomographic velocity model was used for refining hypocenter locations of local earthquakes and for geological in...

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Bibliographic Details
Published in:Geodynamics & Tectonophysics
Main Authors: P. A. Dergach, L. Y. Eponeshnikova, S. N. Ponasenko, A. A. Kartoziia, W. H. Geissler, A. A. Duchkov, S. V. Shibaev, G. Y. Zobnin
Format: Article in Journal/Newspaper
Language:English
Russian
Published: Russian Academy of Sciences, Siberian Branch, Institute of the Earth's crust 2022
Subjects:
local seismology
seismic tomography
geodynamical monitoring
local seismicity
hypocenter relocation
velocity model improvement
low-frequency deconvolution
geophone
Science
Q
lena delta
lena river
Online Access:https://doi.org/10.5800/GT-2022-13-2s-0627
https://doaj.org/article/417624c866e544baa967e3e4b3b676da
Description
Summary:In our paper we present the results of seismotomographic inversion for the local seismological monitoring data obtained in the area of the Samoylov Island (Lena River delta) in 2019–2021. Tomographic velocity model was used for refining hypocenter locations of local earthquakes and for geological interpretation. The results are shown as maps of anomalies of seismic waves and Vp /Vs ratios for the 5 and 10 km depths. The velocity anomalies structure made it possible to interpret low Vp /Vs ratio as rocks related to the Siberian platform, and to compare between the boundary of the low Vp /Vs area and the trace of the known geological fault running along the Olenekskaya Channel.

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