The absence of remotely triggered seismicity in Gujarat, NW India during the Nepal earthquake, 2015
Gujarat in the Northwestern Deccan Volcanic Province of India is among the most seismically earthquake-prone. The region may be susceptible to remote dynamic triggering, especially the Kachchh region, which recently hosted the Mw7.7 Bhuj earthquake in 2001. Its aftershocks continue because it is cri...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-07-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2023.1062916/full |
| _version_ | 1797788225407811584 |
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| author | Mayank Dixit Abhey Ram Bansal |
| author_facet | Mayank Dixit Abhey Ram Bansal |
| author_sort | Mayank Dixit |
| collection | DOAJ |
| description | Gujarat in the Northwestern Deccan Volcanic Province of India is among the most seismically earthquake-prone. The region may be susceptible to remote dynamic triggering, especially the Kachchh region, which recently hosted the Mw7.7 Bhuj earthquake in 2001. Its aftershocks continue because it is critically stressed and contains nucleation points more frequently close to failure. From waveforms and catalog data, we examine whether remote dynamic triggering occurs following 25 April 2015, Mw7.8 Nepal mainshock in the Gujarat region, Northwestern India. The 2015 Nepal event perturbed the Gujarat region with a peak dynamic stress of ∼53 kPa, much higher than the global lower limit of 1 kPa. Due to the large magnitude and high peak dynamic stress, ideally, the 2015 mainshock should have resulted in the triggered seismicity in the study region. To study the remote dynamic triggering in detail, we also have examined the other recent regional large earthquakes with comparable peak dynamic stresses (>50 kPa), namely, 16 April 2013, Mw7.7 Iran, 24 September 2013, Mw7.7 Pakistan, and 26 October 2015, Mw7.7 Afghanistan. Our result shows that despite their significant peak dynamic stress, there is no significant change in the local seismicity. The analysis suggests that the surface wave amplitude is not the only factor that governs the remote dynamic triggering. Our results also indicate that the faults were not critically stressed during the mainshock candidates in the study region. |
| first_indexed | 2024-03-13T01:33:33Z |
| format | Article |
| id | doaj.art-fe02f67669764f38a33a23da4bf99356 |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-03-13T01:33:33Z |
| publishDate | 2023-07-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-fe02f67669764f38a33a23da4bf993562023-07-04T06:27:34ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632023-07-011110.3389/feart.2023.10629161062916The absence of remotely triggered seismicity in Gujarat, NW India during the Nepal earthquake, 2015Mayank Dixit0Abhey Ram Bansal1Institute of Seismological Research (ISR) Raisan, Gandhinagar, IndiaCSIR National Geophysical Research Institute, Hyderabad, IndiaGujarat in the Northwestern Deccan Volcanic Province of India is among the most seismically earthquake-prone. The region may be susceptible to remote dynamic triggering, especially the Kachchh region, which recently hosted the Mw7.7 Bhuj earthquake in 2001. Its aftershocks continue because it is critically stressed and contains nucleation points more frequently close to failure. From waveforms and catalog data, we examine whether remote dynamic triggering occurs following 25 April 2015, Mw7.8 Nepal mainshock in the Gujarat region, Northwestern India. The 2015 Nepal event perturbed the Gujarat region with a peak dynamic stress of ∼53 kPa, much higher than the global lower limit of 1 kPa. Due to the large magnitude and high peak dynamic stress, ideally, the 2015 mainshock should have resulted in the triggered seismicity in the study region. To study the remote dynamic triggering in detail, we also have examined the other recent regional large earthquakes with comparable peak dynamic stresses (>50 kPa), namely, 16 April 2013, Mw7.7 Iran, 24 September 2013, Mw7.7 Pakistan, and 26 October 2015, Mw7.7 Afghanistan. Our result shows that despite their significant peak dynamic stress, there is no significant change in the local seismicity. The analysis suggests that the surface wave amplitude is not the only factor that governs the remote dynamic triggering. Our results also indicate that the faults were not critically stressed during the mainshock candidates in the study region.https://www.frontiersin.org/articles/10.3389/feart.2023.1062916/fullGujarat regiondynamic stressremote earthquakessurface wavesearthquake predication |
| spellingShingle | Mayank Dixit Abhey Ram Bansal The absence of remotely triggered seismicity in Gujarat, NW India during the Nepal earthquake, 2015 Frontiers in Earth Science Gujarat region dynamic stress remote earthquakes surface waves earthquake predication |
| title | The absence of remotely triggered seismicity in Gujarat, NW India during the Nepal earthquake, 2015 |
| title_full | The absence of remotely triggered seismicity in Gujarat, NW India during the Nepal earthquake, 2015 |
| title_fullStr | The absence of remotely triggered seismicity in Gujarat, NW India during the Nepal earthquake, 2015 |
| title_full_unstemmed | The absence of remotely triggered seismicity in Gujarat, NW India during the Nepal earthquake, 2015 |
| title_short | The absence of remotely triggered seismicity in Gujarat, NW India during the Nepal earthquake, 2015 |
| title_sort | absence of remotely triggered seismicity in gujarat nw india during the nepal earthquake 2015 |
| topic | Gujarat region dynamic stress remote earthquakes surface waves earthquake predication |
| url | https://www.frontiersin.org/articles/10.3389/feart.2023.1062916/full |
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