Effect of tidal triggering on seismicity in Taiwan revealed by the empirical mode decomposition method
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 anal...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2012-07-01
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| Series: | Natural Hazards and Earth System Sciences |
| Online Access: | http://www.nat-hazards-earth-syst-sci.net/12/2193/2012/nhess-12-2193-2012.pdf |
| _version_ | 1811256500188872704 |
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| author | H.-J. Chen C.-C. Chen C.-Y. Tseng J.-H. Wang |
| author_facet | H.-J. Chen C.-C. Chen C.-Y. Tseng J.-H. Wang |
| author_sort | H.-J. Chen |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-04-12T17:42:08Z |
| format | Article |
| id | doaj.art-1b9c08236c6b48f4bd3591f7db301216 |
| institution | Directory Open Access Journal |
| issn | 1561-8633 1684-9981 |
| language | English |
| last_indexed | 2024-04-12T17:42:08Z |
| publishDate | 2012-07-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Natural Hazards and Earth System Sciences |
| spelling | doaj.art-1b9c08236c6b48f4bd3591f7db3012162022-12-22T03:22:47ZengCopernicus PublicationsNatural Hazards and Earth System Sciences1561-86331684-99812012-07-011272193220210.5194/nhess-12-2193-2012Effect of tidal triggering on seismicity in Taiwan revealed by the empirical mode decomposition methodH.-J. ChenC.-C. ChenC.-Y. TsengJ.-H. WangThe 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.http://www.nat-hazards-earth-syst-sci.net/12/2193/2012/nhess-12-2193-2012.pdf |
| spellingShingle | H.-J. Chen C.-C. Chen C.-Y. Tseng J.-H. Wang Effect of tidal triggering on seismicity in Taiwan revealed by the empirical mode decomposition method Natural Hazards and Earth System Sciences |
| title | Effect of tidal triggering on seismicity in Taiwan revealed by the empirical mode decomposition method |
| title_full | Effect of tidal triggering on seismicity in Taiwan revealed by the empirical mode decomposition method |
| title_fullStr | Effect of tidal triggering on seismicity in Taiwan revealed by the empirical mode decomposition method |
| title_full_unstemmed | Effect of tidal triggering on seismicity in Taiwan revealed by the empirical mode decomposition method |
| title_short | Effect of tidal triggering on seismicity in Taiwan revealed by the empirical mode decomposition method |
| title_sort | effect of tidal triggering on seismicity in taiwan revealed by the empirical mode decomposition method |
| url | http://www.nat-hazards-earth-syst-sci.net/12/2193/2012/nhess-12-2193-2012.pdf |
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