强震临震微波动: 来自于震源的信息？

doi:10.12196/j.issn.1000-3274.2024.04.011

Abstract

Abstract: This paper briefly reviews the scientific issues, analytical methods, main features, and results of years of real-time earthquake tracking practice on impending strong earthquake microfluctuations. The main characteristics of impending earthquake microfluctuations are summarized as follows: ① The dominant frequency is 11~16 Hz, and the spectrum shape is relatively neat; ② It may appear 2~24 days before the earthquake, and can be recorded by stations within a radius of 70 km of the epicenter; ③ It is reproducible and appears before multiple strong earthquakes; ④ It may be related to the magnitude of the earthquake. The greater the magnitude, the greater the possibility of impending earthquake microfluctuations before the earthquake. This paper introduces the new results of microfluctuations observed during the aftershock activity of the 2021 Yangbi M6.4 earthquake and the 2021 Maduo M7.4 earthquakes. It is inferred that the microfluctuations of imminent strong earthquakes may originate from the hypocentral area or the earthquake rupture zones.

Key words: Strong earthquakes, Microfluctuations of imminent, Dominant frequency 11~16 Hz, Reproducibility, Originating from earthquake source hypocentral area, or earthquake rupture zone

CLC Number:

P315.7

YANG Li-ming, WANG Jian-jun, HAO Zhen. Microfluctuations in Impending Strong Earthquakes: Information from the Hypocentral Area?[J]. EARTHQUAKE, 2024, 44(4): 173-182.

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Microfluctuations in Impending Strong Earthquakes: Information from the Hypocentral Area?

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