"Stress triggering" between different rupture events in several earthquakes

Wan, Yizhao; Wu, Zhongliang; Zhou, Gong-wei; Jing, Huang

doi:10.1007/s11589-000-0062-3

Cited by 16 publications

(9 citation statements)

References 41 publications

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“…The combination of the two shocks gives an increase of more than 0.1×10 5 Pa in the Coulomb stress change at the location of the third shock. Wan Yongge et al [12] had suggested that the increase of Coulomb stress by (0.1-1)×10 5 Pa is possible to trigger an earthquake. If that is the case, our analysis could explain why the third main shock was followed closely to the second event.…”

Section: Discussionmentioning

confidence: 99%

Interaction between adjacent left-lateral strike-slip faults and thrust faults: the 1976 Songpan earthquake sequence

2008

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Section: Discussionmentioning

confidence: 99%

Interaction between adjacent left-lateral strike-slip faults and thrust faults: the 1976 Songpan earthquake sequence

2008

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“…Coulomb stress triggering model has been found to play an important role in the production of aftershocks and subsequent mainshocks on surrounding faults (Harris, 1998;Stein, 1999;King and Cocco, 2001;Freed, 2005). A number of workers have investigated earthquake triggering and achieved marvelous progresses (i.e., King et al, 1994;Harris, 1998;Stein, 1999;King and Cocco, 2001;Freed, 2005;Toda et al, 2008;Parsons et al, 2008;Wan et al, 2000;Shi, 2001;Zhang et al, 2010;Zhu, 2012, 2013). In particular, Stein et al (1997) successfully predicted the 1999 Izmit earthquake by calculating the Coulomb stress changes for ten earthquakes with magnitude over 6.7 in North Anatolian fault from 1939 to 1992, in which 90 per cent of earthquakes were triggered by previous events.…”

Section: Introductionmentioning

confidence: 99%

A Study on Earthquake Triggering: Solution to the Paradox of Coulomb Stress Increase with Frictional Coefficients

Zhu

Miao

2016

Chinese J of Geophysics

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Coulomb stress change calculation has been playing an important part in investigating fault interactions and earthquake triggering. However, the results of most workers showed that Coulomb stress changes (or earthquake triggering effect) would become larger and larger with the increase of apparent frictional coefficients. This phenomenon is clearly in contradiction with our common knowledge in which frictional stress always resists fault slips and inhibits earthquakes under any circumstances. By analyzing the formula for calculating Coulomb stress changes (∆CFS), we found that previous researchers did not take into account the additional ∆CFS which are only resulted from the variations of frictional coefficients. Suppose the depth of typical receiver fault is 15 km, the value of combined ∆CFS will be as large as ∼39.2 MPa when the variation of apparent friction coefficient is 0.1 (e.g., from 0.3 to 0.4), whereas traditional ∆CFS is only 0.8 MPa. If we incorporated the additional ∆CFS in calculation, the above contradiction will disappear completely. Therefore, it is suggested that we should consider changes of combined ∆CFS due to the variation of friction coefficient, especially when we compare different Coulomb stress models with different apparent frictional coefficients.

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“…Calculations of the change in Coulomb failure stress reveal that 9 out of 10 ruptures were brought closer to failure by the preceding shocks, typically by 0.1∼1 MPa, and rearrangement of stresses in the crust leads to subsequent damaging event, the 1999 Izmit earthquake. Wan et al [10] explored static stress triggering problem between several complex events since 1920 in the northeastern Qinghai-Tibetan Plateau based on the formula of Okada. The result suggests that the 2001 Hoh Xil earthquake is promoted by the joint ∆CFS produced by the 1937 Huashixia, the 1963 Dulan, and the 1973, 1997 Mani events.…”

Section: Introductionmentioning

confidence: 99%

A Study of the Impact of Static Coulomb Stress Changes of Megathrust Earthquakes Along Subduction Zone on the Following Aftershocks

Miao¹,

Zhu²

2012

Chinese J of Geophysics

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Research on static earthquake triggering has been carried out widely in the world, and achieved remarkable results. But it is still unclear whether this model is effective to all large earthquakes. In this paper, we investigated the Coulomb stress changes of 3 megathrust earthquakes along subduction zones (the 2011 Mw9.1 Tohoku earthquake, the 2010 Mw8.8 Chile earthquake, and the 2004 Mw9.0 Sumatra‐Andaman earthquake) to test the triggering effects by examining the correlation between Coulomb stress increases and spatial distribution of the following aftershocks. The calculated results suggest that there is no obvious evidence that the Coulomb stress changes caused by the 3 megathrust earthquakes promoted the occurrence of the aftershocks. There are only 47% of the encouraged aftershocks following the Tohoku earthquake. And there are 47.6% and 49.8% for the Sumatra‐Andaman and the Chile earthquake, respectively. We also calculated the Coulomb stress changes with different focal models and parameters. It is still less than 60% of the promoted aftershocks in the optimal case. However, the static triggering model is good for the Wenchuan earthquake and the Chi‐Chi earthquake which have enhanced more than 85% of the subsequent aftershocks. This model may be not reasonable for large subduction earthquakes. Therefore, other model should be introduced in studying earthquake triggering in subduction zone and further studies will be performed.

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"Stress triggering" between different rupture events in several earthquakes

Cited by 16 publications

References 41 publications

Interaction between adjacent left-lateral strike-slip faults and thrust faults: the 1976 Songpan earthquake sequence

Interaction between adjacent left-lateral strike-slip faults and thrust faults: the 1976 Songpan earthquake sequence

A Study on Earthquake Triggering: Solution to the Paradox of Coulomb Stress Increase with Frictional Coefficients

A Study of the Impact of Static Coulomb Stress Changes of Megathrust Earthquakes Along Subduction Zone on the Following Aftershocks

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