Seismicity characteristics before the 2003 Chengkung, Taiwan, earthquake

Yih Min Wu; Chien Chih Chen; Li Zhao; Chien Hsin Chang

doi:10.1016/j.tecto.2008.06.007

Seismicity characteristics before the 2003 Chengkung, Taiwan, earthquake

Yih Min Wu, Chien Chih Chen, Li Zhao, Chien Hsin Chang

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Abstract

We investigate the variations in seismicity pattern in the Taiwan region before the 2003 Chengkung, Taiwan, earthquake (M_w = 6.8) by calculating the standard normal deviate of the Z-values and b-values from the Gutenberg-Richter relation. The Mogi donut-shaped variations in the seismicity can be identified in the Z-value map surrounding the Chengkung earthquake source region. Noticeable decreases in the b-values have also been found around the mainshock region before the Chengkung event. The relatively low-seismicity rate and the decrease in the b-values may be the precursory phenomena associated with the quiescence in overall seismicity and the activation of moderate-sized events occurred around the mainshock region before the Chengkung event.

Original language	English
Pages (from-to)	177-182
Number of pages	6
Journal	Tectonophysics
Volume	457
Issue number	3-4
DOIs	https://doi.org/10.1016/j.tecto.2008.06.007
State	Published - 1 Oct 2008

Keywords

Earthquake
Earthquake precursors
Seismic quiescence
Seismicity
b-values

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10.1016/j.tecto.2008.06.007

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title = "Seismicity characteristics before the 2003 Chengkung, Taiwan, earthquake",

abstract = "We investigate the variations in seismicity pattern in the Taiwan region before the 2003 Chengkung, Taiwan, earthquake (Mw = 6.8) by calculating the standard normal deviate of the Z-values and b-values from the Gutenberg-Richter relation. The Mogi donut-shaped variations in the seismicity can be identified in the Z-value map surrounding the Chengkung earthquake source region. Noticeable decreases in the b-values have also been found around the mainshock region before the Chengkung event. The relatively low-seismicity rate and the decrease in the b-values may be the precursory phenomena associated with the quiescence in overall seismicity and the activation of moderate-sized events occurred around the mainshock region before the Chengkung event.",

keywords = "Earthquake, Earthquake precursors, Seismic quiescence, Seismicity, b-values",

author = "Wu, {Yih Min} and Chen, {Chien Chih} and Li Zhao and Chang, {Chien Hsin}",

note = "Funding Information: This research was supported by the Central Weather Bureau and the National Science Council of the Republic of China (NSC95-2625-Z-002-028, NSC95-2119-M-002-043-MY3 and NSC95-2119-M-001-063). CCC is grateful for research support from both the National Science Council (ROC) and the Institute of Geophysics (NCU, ROC).",

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AU - Wu, Yih Min

AU - Chen, Chien Chih

AU - Zhao, Li

AU - Chang, Chien Hsin

N1 - Funding Information: This research was supported by the Central Weather Bureau and the National Science Council of the Republic of China (NSC95-2625-Z-002-028, NSC95-2119-M-002-043-MY3 and NSC95-2119-M-001-063). CCC is grateful for research support from both the National Science Council (ROC) and the Institute of Geophysics (NCU, ROC).

PY - 2008/10/1

Y1 - 2008/10/1

N2 - We investigate the variations in seismicity pattern in the Taiwan region before the 2003 Chengkung, Taiwan, earthquake (Mw = 6.8) by calculating the standard normal deviate of the Z-values and b-values from the Gutenberg-Richter relation. The Mogi donut-shaped variations in the seismicity can be identified in the Z-value map surrounding the Chengkung earthquake source region. Noticeable decreases in the b-values have also been found around the mainshock region before the Chengkung event. The relatively low-seismicity rate and the decrease in the b-values may be the precursory phenomena associated with the quiescence in overall seismicity and the activation of moderate-sized events occurred around the mainshock region before the Chengkung event.

AB - We investigate the variations in seismicity pattern in the Taiwan region before the 2003 Chengkung, Taiwan, earthquake (Mw = 6.8) by calculating the standard normal deviate of the Z-values and b-values from the Gutenberg-Richter relation. The Mogi donut-shaped variations in the seismicity can be identified in the Z-value map surrounding the Chengkung earthquake source region. Noticeable decreases in the b-values have also been found around the mainshock region before the Chengkung event. The relatively low-seismicity rate and the decrease in the b-values may be the precursory phenomena associated with the quiescence in overall seismicity and the activation of moderate-sized events occurred around the mainshock region before the Chengkung event.

KW - Earthquake

KW - Earthquake precursors

KW - Seismic quiescence

KW - Seismicity

KW - b-values

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U2 - 10.1016/j.tecto.2008.06.007

DO - 10.1016/j.tecto.2008.06.007

M3 - 期刊論文

AN - SCOPUS:51749092626

SN - 0040-1951

VL - 457

SP - 177

EP - 182

JO - Tectonophysics

JF - Tectonophysics

IS - 3-4

ER -

Seismicity characteristics before the 2003 Chengkung, Taiwan, earthquake

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Keywords

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