Spatial and temporal evolution of b-values before large earthquakes in Taiwan

Chung Han Chan; Yih Min Wu; Tai Lin Tseng; Ting Li Lin; Chien Chih Chen

doi:10.1016/j.tecto.2012.02.004

Spatial and temporal evolution of b-values before large earthquakes in Taiwan

Chung Han Chan, Yih Min Wu, Tai Lin Tseng, Ting Li Lin, Chien Chih Chen

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Abstract

We investigate the spatial and temporal variations of b-values before twenty-three earthquakes with M _L≥6.0 in the Taiwan region from 1999 to 2009. We estimate the spatial distribution of b-values within a one-year period before the occurrence of investigated earthquakes. It shows that the epicenters of those earthquakes are located predominately in the regions with low b-values relative to the entire study area. In terms of temporal evolutions, the b-values are slightly lower during the year prior to the investigated earthquakes in comparison to the periods two to five years earlier. We propose that these anomalies may offer spatiotemporal constraints for the earthquake forecasting in Taiwan in the future.

Original language	English
Pages (from-to)	215-222
Number of pages	8
Journal	Tectonophysics
Volume	532-535
DOIs	https://doi.org/10.1016/j.tecto.2012.02.004
State	Published - 6 Mar 2012

Keywords

B-value
Gutenberg-Richter relation
Molchan diagram
Taiwan

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10.1016/j.tecto.2012.02.004

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title = "Spatial and temporal evolution of b-values before large earthquakes in Taiwan",

abstract = "We investigate the spatial and temporal variations of b-values before twenty-three earthquakes with M L≥6.0 in the Taiwan region from 1999 to 2009. We estimate the spatial distribution of b-values within a one-year period before the occurrence of investigated earthquakes. It shows that the epicenters of those earthquakes are located predominately in the regions with low b-values relative to the entire study area. In terms of temporal evolutions, the b-values are slightly lower during the year prior to the investigated earthquakes in comparison to the periods two to five years earlier. We propose that these anomalies may offer spatiotemporal constraints for the earthquake forecasting in Taiwan in the future.",

keywords = "B-value, Gutenberg-Richter relation, Molchan diagram, Taiwan",

author = "Chan, {Chung Han} and Wu, {Yih Min} and Tseng, {Tai Lin} and Lin, {Ting Li} and Chen, {Chien Chih}",

note = "Funding Information: This research was supported by the Central Weather Bureau and the National Science Council ( NSC99-2811-M-002-123 , NSC99-2119-M-002-022 , NSC99-2627-M-002-015 , NSC100-3114-M-002-001 , and NSC99-2116-M-002-006 ) of the Republic of China. We also appreciate the constructive comments provided by editor and two anonymous reviewers.",

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T1 - Spatial and temporal evolution of b-values before large earthquakes in Taiwan

AU - Chan, Chung Han

AU - Wu, Yih Min

AU - Tseng, Tai Lin

AU - Lin, Ting Li

AU - Chen, Chien Chih

N1 - Funding Information: This research was supported by the Central Weather Bureau and the National Science Council ( NSC99-2811-M-002-123 , NSC99-2119-M-002-022 , NSC99-2627-M-002-015 , NSC100-3114-M-002-001 , and NSC99-2116-M-002-006 ) of the Republic of China. We also appreciate the constructive comments provided by editor and two anonymous reviewers.

PY - 2012/3/6

Y1 - 2012/3/6

N2 - We investigate the spatial and temporal variations of b-values before twenty-three earthquakes with M L≥6.0 in the Taiwan region from 1999 to 2009. We estimate the spatial distribution of b-values within a one-year period before the occurrence of investigated earthquakes. It shows that the epicenters of those earthquakes are located predominately in the regions with low b-values relative to the entire study area. In terms of temporal evolutions, the b-values are slightly lower during the year prior to the investigated earthquakes in comparison to the periods two to five years earlier. We propose that these anomalies may offer spatiotemporal constraints for the earthquake forecasting in Taiwan in the future.

AB - We investigate the spatial and temporal variations of b-values before twenty-three earthquakes with M L≥6.0 in the Taiwan region from 1999 to 2009. We estimate the spatial distribution of b-values within a one-year period before the occurrence of investigated earthquakes. It shows that the epicenters of those earthquakes are located predominately in the regions with low b-values relative to the entire study area. In terms of temporal evolutions, the b-values are slightly lower during the year prior to the investigated earthquakes in comparison to the periods two to five years earlier. We propose that these anomalies may offer spatiotemporal constraints for the earthquake forecasting in Taiwan in the future.

KW - B-value

KW - Gutenberg-Richter relation

KW - Molchan diagram

KW - Taiwan

UR - http://www.scopus.com/inward/record.url?scp=84862783415&partnerID=8YFLogxK

U2 - 10.1016/j.tecto.2012.02.004

DO - 10.1016/j.tecto.2012.02.004

M3 - 期刊論文

AN - SCOPUS:84862783415

SN - 0040-1951

VL - 532-535

SP - 215

EP - 222

JO - Tectonophysics

JF - Tectonophysics

ER -

Spatial and temporal evolution of b-values before large earthquakes in Taiwan

Abstract

Keywords

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