Source complexity of the 4 March 2010 Jiashian, Taiwan, Earthquake determined by joint inversion of teleseismic and near field data

Lee, Shiann‐Jong; Mozziconacci, Laetitia; Liang, Wen‐Tzong; Hsu, Ya‐Ju; Huang, Wen-Gee; Huang, Bor‐Shouh

doi:10.1016/j.jseaes.2012.11.018

Cited by 36 publications

(24 citation statements)

References 23 publications

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“…The total source duration of 5.4 s also agrees with estimations from the back-projection of the P-wave envelope ) and rupture directivity analysis of teleseismic P-waves (Hwang et al 2012). However, the estimated source duration is shorter than that inverted by Lee et al (2012). The estimated rake angles for the E1 and E2 are 39° and 45°, also leading to thrust faulting for the rupture process of the two sub-events.…”

Section: Discussionsupporting

confidence: 79%

“…According to rupture directivity analysis, Hwang et al (2012) further demonstrated that the earthquake was a unilateral faulting event with high rupture velocity on the NW-striking fault plane. Lee et al (2012) derived a more complex source model of the JiaSian earthquake, including three main ruptures, from joint inversion of teleseismic and near field data than those only from GPS data (Ching et al 2011;Hsu et al 2011). A special feature of the 2010 JiaSian earthquake is a low static stress drop of approximately 5 bars, which was derived from GPS data using an elastic uniform stress drop inversion by Ching et al (2011).…”

Section: Introductionmentioning

confidence: 99%

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Estimating the Radiated Seismic Energy of the 2010 ML 6.4 JiaSian, Taiwan, Earthquake Using Multiple-Event Analysis

Hwang¹

2012

Terr. Atmos. Ocean. Sci.

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Through a proposed multiple-event analysis of teleseismic P-waves, this study investigated the radiated seismic energy and rupture process of the 2010 JiaSian earthquake. Results showed that the earthquake comprised at least two sub-events. The first sub-event was followed by the second sub-event, ~1.7 s later. The entire source duration was 5.4 s. Let the two sub-events occur on the same fault plane with a strike of 304° and a dip of 28°; the first sub-event had a relatively smaller seismic moment (M 0 ) and larger radiated seismic energy (E S ) than the second sub-event, and this leads to the E S /M 0 of the first sub-event larger than that of the second sub-event thus. This feature implies that the first sub-event probably had a higher static stress drop during faulting. The total M 0 was estimated to be 2.17 × 10 18 Nm, corresponding to M W = 6.15, and the total E S was ~2.91 × 10 13 Nm, larger than that estimated only from a single source. Subsequently, the E S /M 0 was approximately 1.3 × 10 -5 , lower than ordinary earthquakes. The low static stress drop was probably responsible for the low E S /M 0 . Overall, the 2010 JiaSian earthquake was characterized by a relatively low E S /M 0 and low static stress drop, and then the partial stress drop model would be relatively appropriate to interpret its rupture process.

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Section: Discussionsupporting

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Estimating the Radiated Seismic Energy of the 2010 ML 6.4 JiaSian, Taiwan, Earthquake Using Multiple-Event Analysis

Hwang¹

2012

Terr. Atmos. Ocean. Sci.

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“…The epicenter of this event was ~20 km west of the 2010 M w 6.2 Jia‐Shian event (the white star in Figure a), an oblique thrust event that occurred at ~19 km depth [ Huang et al , ]. Previous studies [e.g., Ching et al, ; Hsu et al , ; Lee et al , ; Huang et al , ; Lin et al , ] of the Jia‐Shian event suggested a WNW‐ESE striking fault geometry, which is different from most of the active fault systems mapped at the surface (SW‐NE strike) in SW Taiwan [ Ching et al , ; Huang et al , ].…”

Section: Introductionmentioning

confidence: 91%

Multiple fault slip triggered above the 2016 M_w 6.4 MeiNong earthquake in Taiwan

Huang

Tung

Fielding

et al. 2016

Geophysical Research Letters

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Rapid shortening in convergent mountain belts is often accommodated by slip on faults at multiple levels in upper crust, but no geodetic observation of slip at multiple levels within hours of a moderate earthquake has been shown before. Here we show clear evidence of fault slip within a shallower thrust at 5–10 km depth in SW Taiwan triggered by the 2016 Mw 6.4 MeiNong earthquake at 15–20 km depth. We constrain the primary coseismic fault slip with kinematic modeling of seismic and geodetic measurements and constrain the triggered slip and fault geometry using synthetic aperture radar interferometry. The shallower thrust coincides with a proposed duplex located in a region of high fluid pressure and high interseismic uplift rate, and may be sensitive to stress perturbations. Our results imply that under tectonic conditions such as high‐background stress level and high fluid pressure, a moderate lower crustal earthquake can trigger faults at shallower depth.

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“…The results suggest that aftershock activity might last until the end of 2012. Lee et al (2013a) inferred a complex rupture process with several slip patches distributed inside two main asperities. They also found that most aftershocks occurred near the upper boundary of the deeper asperity and no aftershock was located close to the shallow one.…”

Section: The Jiashian Earthquake Of 4 March 2010mentioning

confidence: 99%

Studies on Aftershocks in Taiwan: A Review

Chen¹,

Leu²,

Chang³

2016

Terr. Atmos. Ocean. Sci.

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We reviewed studies on aftershocks in Taiwan for the following topics: the spatial-temporal distributions and focal-plane solutions of aftershocks fromof thirty larger earthquakes with magnitudes > 5; the correlations between the mainshock and the largest aftershock based on dependence of the differences in magnitudes (∆M), occurrence times (∆T), epicenters (∆H), and focal depths (∆D) upon the mainshock magnitude, M m ; magnitude-dependence of p-value of Omori's law of aftershocks; the correlation between the b-value of the Gutenberg-Richter's frequency-magnitude law and the p-value; application of the epidemic-type aftershock sequences (ETAS) model to describe the aftershock sequence; the mechanisms of triggering aftershocks; and dynamic modeling of aftershocks. The main results are: (1) The spatial distribution of aftershocks for some earthquakes is consistent with the recognized fault; (2) Unlike Båth's law, ∆M slightly increases with M m ; (3) ∆T does not correlate with M m ; (4) ∆D does not correlate with M m ; (5) ∆T somewhat increases with ∆D; (6) The p-value slightly increases with M m ; (7) There is a negative correlation between the b-and p-values. (8) There was seismic quiescence over a broader region of Taiwan before the 1999 Chi-Chi earthquake; (9) Both the static and dynamic stress changes trigger aftershocks; and (10) Dynamic modeling shows that a decrease in elastic modulus is a significant factor in triggering aftershocks.

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Source complexity of the 4 March 2010 Jiashian, Taiwan, Earthquake determined by joint inversion of teleseismic and near field data

Cited by 36 publications

References 23 publications

Estimating the Radiated Seismic Energy of the 2010 ML 6.4 JiaSian, Taiwan, Earthquake Using Multiple-Event Analysis

Estimating the Radiated Seismic Energy of the 2010 ML 6.4 JiaSian, Taiwan, Earthquake Using Multiple-Event Analysis

Multiple fault slip triggered above the 2016 M_w 6.4 MeiNong earthquake in Taiwan

Studies on Aftershocks in Taiwan: A Review

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Source complexity of the 4 March 2010 Jiashian, Taiwan, Earthquake determined by joint inversion of teleseismic and near field data

Cited by 36 publications

References 23 publications

Estimating the Radiated Seismic Energy of the 2010 ML 6.4 JiaSian, Taiwan, Earthquake Using Multiple-Event Analysis

Estimating the Radiated Seismic Energy of the 2010 ML 6.4 JiaSian, Taiwan, Earthquake Using Multiple-Event Analysis

Multiple fault slip triggered above the 2016 Mw 6.4 MeiNong earthquake in Taiwan

Studies on Aftershocks in Taiwan: A Review

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Product

Resources

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Multiple fault slip triggered above the 2016 M_w 6.4 MeiNong earthquake in Taiwan