The Hualien Earthquake Swarms

This special issue was initiated by the recent frequent and numerous moderate-to-small size earthquake swarms occurred in the Hualien area. Frequent small-to-moderate-size earthquakes may release minute strain energy for the small asperity or barrier located on the same or different fault zones, however, growing strain energy may also be accumulated at other deeper or nearby unbroken larger size asperities, for the circumstances such as the 1951, 2018 and the 2021 events. The frequent and copious Hualien earthquake swarms provide us a great opportunity to test the earthquake preparation, initiation, and migration processes, which are the key elements for the understanding of generation of large earthquakes. We welcome contributions from field investigations, seismology, structure geology, and geodesy, etc., for a better understanding of the nature of the Hualien earthquake swarms.


  • Ruey-Juin Rau

    Dr. Ruey-Juin Rau received his PhD degree in geological science from the State University of New York at Binghamton. He is the professor at the Department of Earth Sciences, National Cheng Kung University, Taiwan. His main research interests are seismotectonics and earthquake geodesy.

  • Wen-Tzong Liang

    Dr. Wen-Tzong Liang received his PhD in Geophysics from the National Taiwan University in 1998. He is currently a senior research scientist who is in charge of the Data Management Center at the Institute of Earth Sciences, Academia Sinica in Taipei, Taiwan. He is leading a team to construct several online web services to serve the research community with high-quality, accessible seismic data and derived data products. His interest is to work on observational and real-time seismology.

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