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| Titel |
Effect of tidal triggering on seismicity in Taiwan revealed by the empirical mode decomposition method |
| VerfasserIn |
H.-J. Chen, C.-C. Chen, C.-Y. Tseng, J.-H. Wang |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 12, no. 7 ; Nr. 12, no. 7 (2012-07-12), S.2193-2202 |
| Datensatznummer |
250010985
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| Publikation (Nr.) |
 copernicus.org/nhess-12-2193-2012.pdf |
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| Zusammenfassung |
| The effect of tidal triggering on earthquake occurrence has
been controversial for many years. This study considered earthquakes that
occurred near Taiwan between 1973 and 2008. Because earthquake data are
nonlinear and non-stationary, we applied the empirical mode decomposition
(EMD) method to analyze the temporal variations in the number of daily
earthquakes to investigate the effect of tidal triggering. We compared the
results obtained from the non-declustered catalog with those from two kinds
of declustered catalogs and discuss the aftershock effect on the EMD-based
analysis. We also investigated stacking the data based on in-phase phenomena
of theoretical Earth tides with statistical significance tests. Our results
show that the effects of tidal triggering, particularly the lunar tidal
effect, can be extracted from the raw seismicity data using the approach
proposed here. Our results suggest that the lunar tidal force is likely a
factor in the triggering of earthquakes. |
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