Preprint Review Version 1 Preserved in Portico This version is not peer-reviewed

Electromagnetic and Radon Earthquake Precursors

Version 1 : Received: 12 June 2024 / Approved: 27 June 2024 / Online: 27 June 2024 (11:38:57 CEST)

How to cite: Nikolopoulos, D.; Cantzos, D.; Alam, A.; Dimopoulos, S.; Petraki, E. Electromagnetic and Radon Earthquake Precursors. Preprints 2024, 2024061939. https://doi.org/10.20944/preprints202406.1939.v1 Nikolopoulos, D.; Cantzos, D.; Alam, A.; Dimopoulos, S.; Petraki, E. Electromagnetic and Radon Earthquake Precursors. Preprints 2024, 2024061939. https://doi.org/10.20944/preprints202406.1939.v1

Abstract

Earthquake forecasting is arguably one of the most challenging tasks in Earth sciences owing to the high complexity of the earthquake process. Over the past 40 years, there has been a plethora of work on finding credible, consistent and accurate earthquake precursors. This paper is a cumulative survey on earthquake precursor research, arranged into two broad categories: electromagnetic precursors and radon precursors. In the first category, methods related to measuring electromagnetic radiation in a wide frequency range, i.e. from a few hz to several MHz, are presented. Precursors based on optical and radar imaging acquired by space borne sensors are also considered, in the broad sense, as electromagnetic. In the second category, concentration measurements of radon gas found in soil and air, or even in ground water after being dissolved, form the basis of radon activity precursors. Well-established mathematical techniques for analysing data derived from electromagnetic radiation and radon concentration measurements are also described with an emphasis on fractal methods. Finally, physical models of earthquake generation and propagation aiming at interpreting the foundation of the aforementioned seismic precursors, are investigated

Keywords

electromagnetic radiation; radon gas; earthquakes; satellites; remote sensing; models; anomalies

Subject

Environmental and Earth Sciences, Geophysics and Geology

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