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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.

Tverdyi D.A., Makarov E.O., Parovik R.I.
  1. Federal State Budget Research Institution Institute of Cosmophysical Research and Radio Wave Propagation, Far Eastern Branch of the Russian Academy of Sciences

 Abstract: 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 = 7.0, 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.

Tverdyi D.A., Makarov E.O., Parovik R.I. 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. Geosciences. 2025. Vol 15. № 1 pp. 30 DOI: 10.3390/geosciences15010030