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| Content Provider | Springer Nature Link |
|---|---|
| Author | Peng, ChaoYong Yang, JianSi Zheng, Yu Jiang, XuDong Xu, ZhiQiang Gao, Yu |
| Copyright Year | 2014 |
| Abstract | A crucial part of proposed earthquake early warning systems is a rapid estimate for earthquake magnitude. Most of these methods are focused on the first part of the P-wave train, the earlier and less destructive part of the ground motion that follows an earthquake. A method has been proposed by using the period of the P-wave to determine the magnitude of a large earthquake at local distance, and a specific relation for the Sichuan region was calibrated according to acceleration records of Wenchuan earthquake. The M $_{w}$ 6.6 earthquake hit Lushan County, Sichuan, on April 20, 2013 and the largest aftershocks provide a useful dataset to validate the proposed relation and discuss the risks connected to the extrapolation of magnitude relations with a poor dataset of large earthquake waveforms. A discrepancy between the local magnitude (M $_{L}$) estimated by means of τ $_{ c }$ evaluation and the standard M $_{L}$ (6.4 vs. 7.0) suggests using caution when M $_{L}$ vs. τ $_{ c }$ calibrations do not include a relevant dataset of large earthquakes. Effects from large residuals could be mitigated or removed by introducing selection rules on τ $_{ c }$ function, by regionalizing the M $_{L}$ vs. τ $_{ c }$ function in the presence of significant tectonic or geological heterogeneity, and by using probabilistic and evolutionary methods. |
| Starting Page | 3118 |
| Ending Page | 3124 |
| Page Count | 7 |
| File Format | |
| ISSN | 16747313 |
| Journal | Science in China Series D: Earth Sciences |
| Volume Number | 57 |
| Issue Number | 12 |
| e-ISSN | 18691897 |
| Language | English |
| Publisher | Science China Press |
| Publisher Date | 2014-10-29 |
| Publisher Place | Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | earthquake early warning systems τ $_{ c }$ method Lushan earthquake magnitude Earth Sciences |
| Content Type | Text |
| Resource Type | Article |
| Subject | Earth and Planetary Sciences |
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