Fault‐to‐Fault Jumping Rupture of the 2018 Mw 6.4 Hualien Earthquake in Eastern Taiwan

Abstract

Research Article| September 26, 2018 Fault‐to‐Fault Jumping Rupture of the 2018 Mw 6.4 Hualien Earthquake in Eastern Taiwan Shiann‐Jong Lee; Shiann‐Jong Lee aInstitute of Earth Sciences, Academia Sinica, No. 128, Section 2, Academia Road, Nankang, Taipei 11529, Taiwan, [e-mail] Search for other works by this author on: GSW Google Scholar Tzu‐Chi Lin; Tzu‐Chi Lin bDepartment of Geosciences, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan Search for other works by this author on: GSW Google Scholar Ting‐Yu Liu; Ting‐Yu Liu aInstitute of Earth Sciences, Academia Sinica, No. 128, Section 2, Academia Road, Nankang, Taipei 11529, Taiwan, [e-mail] Search for other works by this author on: GSW Google Scholar Tong‐Pong Wong Tong‐Pong Wong bDepartment of Geosciences, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan Search for other works by this author on: GSW Google Scholar Author and Article Information Shiann‐Jong Lee aInstitute of Earth Sciences, Academia Sinica, No. 128, Section 2, Academia Road, Nankang, Taipei 11529, Taiwan, [e-mail] Tzu‐Chi Lin bDepartment of Geosciences, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan Ting‐Yu Liu aInstitute of Earth Sciences, Academia Sinica, No. 128, Section 2, Academia Road, Nankang, Taipei 11529, Taiwan, [e-mail] Tong‐Pong Wong bDepartment of Geosciences, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan Publisher: Seismological Society of America First Online: 26 Sep 2018 Online Issn: 1938-2057 Print Issn: 0895-0695 © Seismological Society of America Seismological Research Letters (2019) 90 (1): 30–39. https://doi.org/10.1785/0220180182 Article history First Online: 26 Sep 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Shiann‐Jong Lee, Tzu‐Chi Lin, Ting‐Yu Liu, Tong‐Pong Wong; Fault‐to‐Fault Jumping Rupture of the 2018 Mw 6.4 Hualien Earthquake in Eastern Taiwan. Seismological Research Letters 2018;; 90 (1): 30–39. doi: https://doi.org/10.1785/0220180182 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietySeismological Research Letters Search Advanced Search ABSTRACT A fault‐to‐fault jumping rupture was found during the 2018 Mw 6.4 Hualien earthquake that occurred in eastern Taiwan. Joint source inversion results indicated that the initial rupture started from a north–south (N‐S)–striking fault dipping to the west and propagated to the south with a high rupture speed. The rupture then jumped to the shallower east‐dipping Milun fault. Slip on the Milun fault was slow and continued for more than 10 s, which produced the largest asperity near the city of Hualien. The rupture jumped again to the Lingding fault in the northernmost Longitudinal Valley (LV). This fault‐to‐fault rupture process implied that slip on the Milun and Lingding faults was triggered by the N‐S–striking west‐dipping fault plane where the initial rupture originated. In other words, the movement on the Milun fault was passive; it was just part of a secondary branch of the major structural system in the northernmost LV. Based on this inverted source model, the static Coulomb failure stress increased along the LV, which is a crucial issue for potential seismic hazards in eastern Taiwan in the near future. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.