Work

Distribution of Reduced Seismic Energy and Stress Drop in the Altai-sayan Seismoactive Region

Year: 2025

Type: article

Abstract: The data bank has been created to address the tensor of the seismic moment of earthquakes that occurred in the Altai-Sayan seismically active region in the period 1978–2025. The scalar seismic moment M0 for these events was already known from the CMT catalog. This paper presents estimates of the following dynamic parameters: source radius r, shear stress drop ∆σ, and reduced seismic energy ePR using a phenomenological approach based on previously obtained regression relationships between the source radius r and the scalar seismic moment M0. Stress drop and reduced seismic energy estimates have been obtained for 69 earthquakes with a magnitude MW 3.5–7.2. Thus, it allows to significantly expand the data bank on these earthquake parameters for the Altai-Sayan seismically active region. Maps have been drawn of the areally averaged estimates of stress drop and reduced seismic energy.

Source: Geodynamics & Tectonophysics

DOI: 10.5800/gt-2025-16-4-0835

Authors: N. A. Sycheva, L. M. Bogomolov

Institutions: Russian Academy of Sciences, Schmidt Institute of Physics of the Earth, Institute of Marine Geology and Geophysics, Far Eastern Branch of the Russian Academy of Sciences

Language: English

Topic: earthquake and tectonic studies

Subfield: Geophysics

Field: Earth and Planetary Sciences

Domain: Physical Sciences

Open Access status: diamond

OpenAlex ID: W4413283142

FWCI:

Cites: 25

Cited by:

Related to: 10