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A long source area of the 1906 Colombia-Ecuador earthquake estimated from observed tsunami waveforms

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Title: A long source area of the 1906 Colombia-Ecuador earthquake estimated from observed tsunami waveforms
Authors: Yamanaka, Yusuke Browse this author
Tanioka, Yuichiro Browse this author →KAKEN DB
Shiina, Takahiro Browse this author
Keywords: 1906 Colombia-Ecuador earthquake
Slip distribution
Inverse analysis
Tsunami waveforms
Issue Date: 6-Dec-2017
Publisher: Springer
Journal Title: Earth planets and space
Volume: 69
Start Page: 163
Publisher DOI: 10.1186/s40623-017-0750-z
Abstract: The 1906 Colombia-Ecuador earthquake induced both strong seismic motions and a tsunami, the most destructive earthquake in the history of the Colombia-Ecuador subduction zone. The tsunami propagated across the Pacific Ocean, and its waveforms were observed at tide gauge stations in countries including Panama, Japan, and the USA. This study conducted slip inverse analysis for the 1906 earthquake using these waveforms. A digital dataset of observed tsunami waveforms at the Naos Island (Panama) and Honolulu (USA) tide gauge stations, where the tsunami was clearly observed, was first produced by consulting documents. Next, the two waveforms were applied in an inverse analysis as the target waveform. The results of this analysis indicated that the moment magnitude of the 1906 earthquake ranged from 8.3 to 8.6. Moreover, the dominant slip occurred in the northern part of the assumed source region near the coast of Colombia, where little significant seismicity has occurred, rather than in the southern part. The results also indicated that the source area, with significant slip, covered a long distance, including the southern, central, and northern parts of the region.
Type: article
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 谷岡 勇市郎

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