Temporal variation of tectonic tremor activity in southern Taiwan around the 2010 ML6.4 Jiashian earthquake

Kevin Chao, Zhigang Peng, Ya Ju Hsu, Kazushige Obara, Chunquan Wu, Kuo-En Ching, Suzan van der Lee, Hsin Chieh Pu, Peih Lin Leu, Aaron Wech

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Deep tectonic tremor, which is extremely sensitive to small stress variations, could be used to monitor fault zone processes during large earthquake cycles and aseismic processes before large earthquakes. In this study, we develop an algorithm for the automatic detection and location of tectonic tremor beneath the southern Central Range of Taiwan and examine the spatiotemporal relationship between tremor and the 4 March 2010 ML6.4 Jiashian earthquake, located about 20 km from active tremor sources. We find that tremor in this region has a relatively short duration, short recurrence time, and no consistent correlation with surface GPS data. We find a short-term increase in the tremor rate 19 days before the Jiashian main shock, and around the time when the tremor rate began to rise one GPS station recorded a flip in its direction of motion. We hypothesize that tremor is driven by a slow-slip event that preceded the occurrence of the shallower Jiashian main shock, even though the inferred slip is too small to be observed by all GPS stations. Our study shows that tectonic tremor may reflect stress variation during the prenucleation process of a nearby earthquake.

Original languageEnglish
Pages (from-to)5417-5434
Number of pages18
JournalJournal of Geophysical Research: Solid Earth
Volume122
Issue number7
DOIs
Publication statusPublished - 2017 Jul 1

Fingerprint

tremors
Taiwan
Tectonics
tectonics
Earthquakes
temporal variation
earthquakes
Global positioning system
earthquake
GPS
fault zone
slip
stations
shock
occurrences
rate
station
cycles

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Geochemistry and Petrology
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science

Cite this

Chao, Kevin ; Peng, Zhigang ; Hsu, Ya Ju ; Obara, Kazushige ; Wu, Chunquan ; Ching, Kuo-En ; van der Lee, Suzan ; Pu, Hsin Chieh ; Leu, Peih Lin ; Wech, Aaron. / Temporal variation of tectonic tremor activity in southern Taiwan around the 2010 ML6.4 Jiashian earthquake. In: Journal of Geophysical Research: Solid Earth. 2017 ; Vol. 122, No. 7. pp. 5417-5434.
@article{7af0d15ebdcf4b50b74d15062b4bf540,
title = "Temporal variation of tectonic tremor activity in southern Taiwan around the 2010 ML6.4 Jiashian earthquake",
abstract = "Deep tectonic tremor, which is extremely sensitive to small stress variations, could be used to monitor fault zone processes during large earthquake cycles and aseismic processes before large earthquakes. In this study, we develop an algorithm for the automatic detection and location of tectonic tremor beneath the southern Central Range of Taiwan and examine the spatiotemporal relationship between tremor and the 4 March 2010 ML6.4 Jiashian earthquake, located about 20 km from active tremor sources. We find that tremor in this region has a relatively short duration, short recurrence time, and no consistent correlation with surface GPS data. We find a short-term increase in the tremor rate 19 days before the Jiashian main shock, and around the time when the tremor rate began to rise one GPS station recorded a flip in its direction of motion. We hypothesize that tremor is driven by a slow-slip event that preceded the occurrence of the shallower Jiashian main shock, even though the inferred slip is too small to be observed by all GPS stations. Our study shows that tectonic tremor may reflect stress variation during the prenucleation process of a nearby earthquake.",
author = "Kevin Chao and Zhigang Peng and Hsu, {Ya Ju} and Kazushige Obara and Chunquan Wu and Kuo-En Ching and {van der Lee}, Suzan and Pu, {Hsin Chieh} and Leu, {Peih Lin} and Aaron Wech",
year = "2017",
month = "7",
day = "1",
doi = "10.1002/2016JB013925",
language = "English",
volume = "122",
pages = "5417--5434",
journal = "Journal of Geophysical Research",
issn = "0148-0227",
publisher = "American Geophysical Union",
number = "7",

}

Temporal variation of tectonic tremor activity in southern Taiwan around the 2010 ML6.4 Jiashian earthquake. / Chao, Kevin; Peng, Zhigang; Hsu, Ya Ju; Obara, Kazushige; Wu, Chunquan; Ching, Kuo-En; van der Lee, Suzan; Pu, Hsin Chieh; Leu, Peih Lin; Wech, Aaron.

In: Journal of Geophysical Research: Solid Earth, Vol. 122, No. 7, 01.07.2017, p. 5417-5434.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Temporal variation of tectonic tremor activity in southern Taiwan around the 2010 ML6.4 Jiashian earthquake

AU - Chao, Kevin

AU - Peng, Zhigang

AU - Hsu, Ya Ju

AU - Obara, Kazushige

AU - Wu, Chunquan

AU - Ching, Kuo-En

AU - van der Lee, Suzan

AU - Pu, Hsin Chieh

AU - Leu, Peih Lin

AU - Wech, Aaron

PY - 2017/7/1

Y1 - 2017/7/1

N2 - Deep tectonic tremor, which is extremely sensitive to small stress variations, could be used to monitor fault zone processes during large earthquake cycles and aseismic processes before large earthquakes. In this study, we develop an algorithm for the automatic detection and location of tectonic tremor beneath the southern Central Range of Taiwan and examine the spatiotemporal relationship between tremor and the 4 March 2010 ML6.4 Jiashian earthquake, located about 20 km from active tremor sources. We find that tremor in this region has a relatively short duration, short recurrence time, and no consistent correlation with surface GPS data. We find a short-term increase in the tremor rate 19 days before the Jiashian main shock, and around the time when the tremor rate began to rise one GPS station recorded a flip in its direction of motion. We hypothesize that tremor is driven by a slow-slip event that preceded the occurrence of the shallower Jiashian main shock, even though the inferred slip is too small to be observed by all GPS stations. Our study shows that tectonic tremor may reflect stress variation during the prenucleation process of a nearby earthquake.

AB - Deep tectonic tremor, which is extremely sensitive to small stress variations, could be used to monitor fault zone processes during large earthquake cycles and aseismic processes before large earthquakes. In this study, we develop an algorithm for the automatic detection and location of tectonic tremor beneath the southern Central Range of Taiwan and examine the spatiotemporal relationship between tremor and the 4 March 2010 ML6.4 Jiashian earthquake, located about 20 km from active tremor sources. We find that tremor in this region has a relatively short duration, short recurrence time, and no consistent correlation with surface GPS data. We find a short-term increase in the tremor rate 19 days before the Jiashian main shock, and around the time when the tremor rate began to rise one GPS station recorded a flip in its direction of motion. We hypothesize that tremor is driven by a slow-slip event that preceded the occurrence of the shallower Jiashian main shock, even though the inferred slip is too small to be observed by all GPS stations. Our study shows that tectonic tremor may reflect stress variation during the prenucleation process of a nearby earthquake.

UR - http://www.scopus.com/inward/record.url?scp=85026289496&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85026289496&partnerID=8YFLogxK

U2 - 10.1002/2016JB013925

DO - 10.1002/2016JB013925

M3 - Article

VL - 122

SP - 5417

EP - 5434

JO - Journal of Geophysical Research

JF - Journal of Geophysical Research

SN - 0148-0227

IS - 7

ER -