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Temporal correlation of proton density and earthquake magnitude within the theory of solar- induced earthquakes: Croatian December 2020 M=6.4 case study

Solar-induced earthquakes are a relatively new field of research of possible connection between events originating from the Sun and Earth’s lithosphere dynamics. This is a theory that tries to explain the temporal correlation between the solar activity increase, particularly measured using proton density values, and the occurrence of the strongest earthquakes on Earth. In this paper, the case study of Croatian major earthquake in December 2020 was investigated. The increase in proton density as measured by STEREO satellite, by +4.2 standard deviations from the monthly mean value, preceding the main shock of M=6.4 by 16 hours. Such proton density increases within one day before a major earthquake and agrees with the previous research where a strong temporal correlation of those two events was found

2020 earthquake in Petrinja ; proton density ; solar-induced earthquakes

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