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Detecting remotely triggered microseismicity around Changbaishan Volcano following nuclear explosions in North Korea and large distant earthquakes around the world
Author(s) -
Liu Guoming,
Li Chenyu,
Peng Zhigang,
Li Xuemei,
Wu Jing
Publication year - 2017
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1002/2017gl072511
Subject(s) - seismology , volcano , geology , intraplate earthquake , tectonics
We conduct a systematic survey on locally triggered earthquakes by large distant earthquakes in Changbaishan Volcano, an active intraplate volcano on the border between China and North Korea. We examine waveforms of distant earthquakes recorded at broadband station Changbaishan (CBS) near the volcano with estimated dynamic stresses over 5 kPa between 2000 and 2016. Out of 26 selected distant earthquakes, three of them show positive evidence of triggering during large‐amplitude surface waves. The earthquakes that had positive or possible evidences of triggering generated larger long‐period surface waves, indicating that they are more efficient in triggering microseismicity. In addition, since 2006 North Korea has conducted five underground nuclear explosion (UNE) tests only ~140 km away from Changbaishan Volcano. By systematically examining waveforms of these UNEs recorded at station CBS, we find that none of them have triggered microearthquakes in Changbaishan Volcano.