Displaying the structure and rheological properties of a fault zone in the characteristics of background seismicity

Мұқаба

Дәйексөз келтіру

Толық мәтін

Ашық рұқсат Ашық рұқсат
Рұқсат жабық Рұқсат берілді
Рұқсат жабық Рұқсат ақылы немесе тек жазылушылар үшін

Аннотация

Spatial heterogeneity of structural and rheological properties of a fault is one of the key factors determining the dynamics of its deformation. The paper analyzes spatial and temporal patterns of seismic localization in several segments of the San Andreas fault zone. Groups of background and clastered events are distinguished. It is shown that background events exhibit structural features of the fault. Asperities in the fault plane appear as dense clusters of background events. Foci of strong earthquakes with magnitudes exceeding the maximum magnitude of background events 1.5–2 times completely rupture at least one contact spots. The fault area located between the asperities controls the slow postseismic slip and, consequently, postseismic aftershock activity. The number of aftershocks is maximal at the boundary of the earthquake’s focal area and decreases monotonously with distance from the hypocenter. In the area between the asperities, the speed of aftershock migration is 0.01–10 km/day.

Авторлар туралы

A. Ostapchuk

Sadovsky Institute for Dynamics of Geospheres, Russian Academy of Sciences

Email: ostapchuk.aa@idg.ras.ru
Moscow, Russia

Әдебиет тізімі

  1. Waldhauser F. Near-real-time double-difference event location using long-term seismic archives, with application to Northern California // Bull. Seism. Soc. Am. 2009. № 99. P. 2736–2848. https://doi.org/10.1785/0120080294
  2. Кочарян Г.Г. Геомеханика разломов. М.: ГЕОС, 2016.
  3. Гридин Г.А., Остапчук А.А., Григорьева А.В., Павлов Д.В., Черемных А.В., Бобров А.А., Декабрёв И.К. Вариации структурных и физико-механических свойств тектонического разлома в приповерхностной зоне // Физика Земли. 2025. № 1. С. 138–150.
  4. Collettini C., Tesei T., Scuderi M.M., Carpenter B.M., Viti C. Beyond Byerlee Friction, Weak Faults and Implications for Slip Behavior // Earth Planet. Sci. Lett. 2019. № 519. P. 245–263. https://doi.org/10.1016/j.epsl.2019.05.011
  5. Ide S. Frequent observations of identical onsets of large and small earthquakes // Nature. 2019. V. 573. P. 112–116. https://doi.org/10.1038/s41586-019-1508-5
  6. Adushkin, V.V., Besedina, A.N., Kocharyan, G.G. et al. A New Approach to Hazard Control of Human-Triggered Earthquakes near Mining Facilities // Dokl. Earth Sc. 2024. V. 519. P. 1930–1935. https://doi.org/10.1134/S1028334X24603213
  7. Villegas-Lanza J., Nocquet J.M., Rolandone F. et al. A mixed seismic–aseismic stress release episode in the Andean subduction zone // Nature Geosci. 2016. № 9. P. 150–154. https://doi.org/10.1038/ngeo2620
  8. Shebalin P.N., Narteau C., Baranov S.V. Earthquake productivity law // Geophysical Journal International. 2020. № 222. P. 1264–1269. https://doi.org/10.1093/gji/ggaa252
  9. Zaliapin I., Ben-Zion Y. Earthquake Clusters in Southern California I: Identification and Stability // J. Geophys. Res. Solid Earth. 2013. № 118. P. 2847–2864. https://doi.org/10.1002/jgrb.50179
  10. Баранов С.В., Шебалин П.Н. Закономерности постсейсмических процессов и прогноз опасности сильных афтершоков. M.: РАН, 2019. 218 с.
  11. Кочарян Г.Г., Остапчук А.А. Мезоструктура зоны скольжения тектонического разлома // Физическая мезомеханика. 2022. Т. 25. № 5. С. 94–105.
  12. Ester M., Kriegel H.-P., Sander J., Xiaowei X. A density-based algorithm for discovering clusters in large spatial databases with noise / Proceedings of the Second International Conference on Knowledge Discovery in Databases and Data Mining. 1996. P. 226–231.
  13. Frank W.B., Poli P., Perfettini H. Mapping the rheology of the Central Chile subduction zone with aftershocks // Geophys. Res. Lett. 2017. № 44. https://doi.org/10.1002/2016GL072288
  14. Brune J.N. Tectonic stress and spectra of seismic shear waves from earthquakes // J. Geophys. Res. 1970. № 75. P. 4997–5009. https://doi.org/10.1029/JB075i026p04997
  15. Kanamori H., Stewart G.S., Seismological aspects of the Guatemala earthquake of February 4, 1976 // J. Geophys. Res. 1978. V. 83. P. 3427–3434. https://doi.org/10.1029/JB083iB07p03427
  16. Федотов С.А., Соломатин А.В., Чернышев С.Д. Долгосрочный сейсмический прогноз для Курило-Камчатской дуги на IX 2010 – VIII 2015 гг., достоверность предыдущих прогнозов и их применение // Вулканология и сейсмология. 2011. № 2. С. 3–27.

Қосымша файлдар

Қосымша файлдар
Әрекет
1. JATS XML
Жүктеу

© Russian Academy of Sciences, 2025