Image of Estimation of Radon Flux Density Changes in Temporal Vicinity of the Shipunskoe Earthquake with Mw 7.0, 17 August 2024 with the Use of the Hereditary Mathematical Model

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Estimation of Radon Flux Density Changes in Temporal Vicinity of the Shipunskoe Earthquake with Mw 7.0, 17 August 2024 with the Use of the Hereditary Mathematical Model

Using the data of radon accumulation in a chamber with excess volume at one of the points of the Kamchatka subsurface gas-monitoring network, the change in radon flux density due to seismic waves and post-seismic relaxation of the medium is shown. A linear fractional equation is considered to be a model equation. The change of radon-transport intensity due to changes in the state of the geo-environment is described by a fractional Gerasimov–Caputo derivative of constant order. Presumably, the order of the fractional derivative is related to the radon-transport intensity in the geosphere. Using the Levenberg–Marquardt method, the optimal values of the model parameters were determined based on experimental data: air exchange coefficient and order of fractional derivative, which allowed the solving of the problems of radon flux density determination. Data in the temporal neighborhood of a strong earthquake with Mw 7, which occurred in the northern part of Avacha Bay on 17 August 2024, were used. As a result of the modeling, it is shown that the strong seismic impact and subsequent processes led to changes in the radon flux in the accumulation chamber. The obtained model curves agree well with the real data, and the obtained estimates of radon flux density agree with the theory.

Availability
351550Perpustakaan BIG (Eksternal Harddisk)Available
Detail Information
Series Title
Geosciences
Call Number
550
Publisher
Switzerland : MPDI.,
Collation
24 hlm PDF, 946 KB
Language
Inggris
ISBN/ISSN
2076-3263
Classification
550
Content Type
text
Media Type
-
Carrier Type
online resource
Edition
Vol.15, Issue 1, January 2025
Subject(s)
Matlab
mathematical modeling
radon volumetric activity
radon flux density
earthquake precursors
Gerasimov–Caputo fractional derivative
memory effect
non-locality
inverse problems
Levenberg – Marquardt algorithm
Gnuplot
Specific Detail Info
Geosciences
Statement of Responsibility
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