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The paper presents the modeling results of rock principle axis orientaion during the preparation of strong earthquakes occurred near Kamchatka peninsula from 1976 to 2020. It was established that maximum compression axis direction was within the sector bounded by the azimuths of \(330.5^\circ \) and \(84.2^\circ \) , the modal interval was from \(22.5^\circ \) to \(45.0^\circ \) , the average was \(32.7^\circ \) . Modeling results were compared with estimation results for rock maximum compression axis based on the data of experimental observations of geoacoustic radiation directivity at Mikizha site in Kamchatka. The estimations were made based on the directivity anomalies occurred during earthquakes preparation for the period from 2008 to 2016. It was discovered that the average value of the maximum compression axis direction, determined according to the modeling results, agrees well with the value, determined according to the experimental observation results. The obtained results are topical for the investigation of geodeformation process characteristics and can be used to develop a system of seismic hazard level assessment in seismically active regions. The work was supported by IKIR FEB RAS State Task (subject registration No. 124012300245-2).

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Modeling of Principle Stress Axis Orientation to Investigate Anisotropy of Pre-Seismic Geoacoustic Radiation

  • 会议论文

  • 发表日期：

    2026年

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  • Maksim Gapeev,
  • Yury Marapulets,
  • Alexandra Solodchuk

摘要

The paper presents the modeling results of rock principle axis orientaion during the preparation of strong earthquakes occurred near Kamchatka peninsula from 1976 to 2020. It was established that maximum compression axis direction was within the sector bounded by the azimuths of \(330.5^\circ \) and \(84.2^\circ \) , the modal interval was from \(22.5^\circ \) to \(45.0^\circ \) , the average was \(32.7^\circ \) . Modeling results were compared with estimation results for rock maximum compression axis based on the data of experimental observations of geoacoustic radiation directivity at Mikizha site in Kamchatka. The estimations were made based on the directivity anomalies occurred during earthquakes preparation for the period from 2008 to 2016. It was discovered that the average value of the maximum compression axis direction, determined according to the modeling results, agrees well with the value, determined according to the experimental observation results. The obtained results are topical for the investigation of geodeformation process characteristics and can be used to develop a system of seismic hazard level assessment in seismically active regions. The work was supported by IKIR FEB RAS State Task (subject registration No. 124012300245-2).