Precursory Tidal Triggering of the 2011 Mw 9.0 Tohoku Aftershocks
Precursory earth tidal triggering is believed to influence earthquake timing preferentially when a region is critically stressed. However, whether and how the recurrence of aftershocks after a giant earthquake is affected by tidal triggering remains perplexing. To provide insight into this study, we...
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MDPI AG
2022-08-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/17/8730 |
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| author | Chaodi Xie Ye Zhu Yingfeng Ji Weiling Zhu Rui Qu |
| author_facet | Chaodi Xie Ye Zhu Yingfeng Ji Weiling Zhu Rui Qu |
| author_sort | Chaodi Xie |
| collection | DOAJ |
| description | Precursory earth tidal triggering is believed to influence earthquake timing preferentially when a region is critically stressed. However, whether and how the recurrence of aftershocks after a giant earthquake is affected by tidal triggering remains perplexing. To provide insight into this study, we utilized the Schuster test to explore the tidally induced stress variation correlated with the 2011 Mw 9.0 Tohoku earthquake aftershock sequence by determining the tidal phase angle at the occurrence time of events and the periodic characteristics of the aftershocks. Our results show that the aftershocks were triggered by short-period tides, including semidiurnal and diurnal tides. The rupture associated with the mainshock likely resulted in a critical stress state in the focal region, which is conducive to tidal triggering. We subdivided the aftershock catalog into several subsets, using a depth of 30 km and a magnitude of 5 as discriminators. The analysis of these subsets reveals that weaker and deeper earthquakes are best correlated with Earth tides, which will be helpful to investigate the mechanisms of tidal correlation. |
| first_indexed | 2024-03-10T03:02:01Z |
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| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T03:02:01Z |
| publishDate | 2022-08-01 |
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| spelling | doaj.art-a8d5253bb10b406cba39580f1eca2cb12023-11-23T12:46:01ZengMDPI AGApplied Sciences2076-34172022-08-011217873010.3390/app12178730Precursory Tidal Triggering of the 2011 Mw 9.0 Tohoku AftershocksChaodi Xie0Ye Zhu1Yingfeng Ji2Weiling Zhu3Rui Qu4Geophysics Department, School of Earth Sciences, Yunnan University, Kunming 650500, ChinaState Key Laboratory of Tibetan Plateau Earth System, Resources and Environment (TPESRE), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, ChinaState Key Laboratory of Tibetan Plateau Earth System, Resources and Environment (TPESRE), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, ChinaState Key Laboratory of Tibetan Plateau Earth System, Resources and Environment (TPESRE), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, ChinaState Key Laboratory of Tibetan Plateau Earth System, Resources and Environment (TPESRE), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, ChinaPrecursory earth tidal triggering is believed to influence earthquake timing preferentially when a region is critically stressed. However, whether and how the recurrence of aftershocks after a giant earthquake is affected by tidal triggering remains perplexing. To provide insight into this study, we utilized the Schuster test to explore the tidally induced stress variation correlated with the 2011 Mw 9.0 Tohoku earthquake aftershock sequence by determining the tidal phase angle at the occurrence time of events and the periodic characteristics of the aftershocks. Our results show that the aftershocks were triggered by short-period tides, including semidiurnal and diurnal tides. The rupture associated with the mainshock likely resulted in a critical stress state in the focal region, which is conducive to tidal triggering. We subdivided the aftershock catalog into several subsets, using a depth of 30 km and a magnitude of 5 as discriminators. The analysis of these subsets reveals that weaker and deeper earthquakes are best correlated with Earth tides, which will be helpful to investigate the mechanisms of tidal correlation.https://www.mdpi.com/2076-3417/12/17/8730tidal triggeringstress changeSchuster spectrumaftershock2011 Mw 9.0 Tohoku earthquake |
| spellingShingle | Chaodi Xie Ye Zhu Yingfeng Ji Weiling Zhu Rui Qu Precursory Tidal Triggering of the 2011 Mw 9.0 Tohoku Aftershocks Applied Sciences tidal triggering stress change Schuster spectrum aftershock 2011 Mw 9.0 Tohoku earthquake |
| title | Precursory Tidal Triggering of the 2011 Mw 9.0 Tohoku Aftershocks |
| title_full | Precursory Tidal Triggering of the 2011 Mw 9.0 Tohoku Aftershocks |
| title_fullStr | Precursory Tidal Triggering of the 2011 Mw 9.0 Tohoku Aftershocks |
| title_full_unstemmed | Precursory Tidal Triggering of the 2011 Mw 9.0 Tohoku Aftershocks |
| title_short | Precursory Tidal Triggering of the 2011 Mw 9.0 Tohoku Aftershocks |
| title_sort | precursory tidal triggering of the 2011 mw 9 0 tohoku aftershocks |
| topic | tidal triggering stress change Schuster spectrum aftershock 2011 Mw 9.0 Tohoku earthquake |
| url | https://www.mdpi.com/2076-3417/12/17/8730 |
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