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On the Spatial-Temporal Structure of Aftershock Sequences

  • O. D. ZotovEmail author
  • A. D. Zavyalov
  • B. I. Klain
Conference paper
Part of the Springer Proceedings in Earth and Environmental Sciences book series (SPEES)

Abstract

The work presents results of statistical analysis of the spatial-temporal distribution of strong aftershocks. Data from the world catalog of earthquakes USGS/NEIC from 1973 to 2014 (https://earthquake.usgs.gov) and from the regional earthquakes catalog of Northern California from 1968 to 2007 (http://www.ncedc.org) were used. Short time intervals were considered—no more than 10 h before and after main shock and distance from the epicenter of the main shock—up to 5°. The distribution of the aftershocks number in the time-distance coordinates from the main shocks was investigated. The main shocks with magnitude Mms ≥ 7.5 and aftershocks with 6 ≤ Maft < Mms for the world catalog NEIC USGS and the main shocks Mms ≥ 5 and aftershocks with 4 ≤ Maft < Mms for Northern California catalog were considered. It is shown that the spatial-temporal distribution of strong aftershocks forms a similarity of a wave structure.

Keywords

Main shock Aftershock Spatial-temporal structure 

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Copyright information

© Springer Nature Switzerland AG 2020

Authors and Affiliations

  1. 1.Borok Geophysical Observatory, Schmidt Institute of Physics of the EarthRussian Academy of SciencesBorok, Yaroslavl RegionRussia
  2. 2.Schmidt Institute of Physics of the EarthRussian Academy of SciencesMoscowRussia

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