Fault associated with the 1967 M 6.3 Koyna earthquake, India: A review of recent studies and perspectives for further probing
The Koyna region in western India, characterized by recurrent seismic activity over more than five decades and confined largely within a 20 km × 30 km area and ∼10 km in depth, is a classical site to study earthquake processes. The largest earthquake in the region, the M 6.3 Koyna earthquake of Dece...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-12-01
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| Series: | Journal of Asian Earth Sciences: X |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590056022000445 |
| _version_ | 1811294444861784064 |
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| author | Kunal Modak Sunil Rohilla Nagaraju Podugu Deepjyoti Goswami Sukanta Roy |
| author_facet | Kunal Modak Sunil Rohilla Nagaraju Podugu Deepjyoti Goswami Sukanta Roy |
| author_sort | Kunal Modak |
| collection | DOAJ |
| description | The Koyna region in western India, characterized by recurrent seismic activity over more than five decades and confined largely within a 20 km × 30 km area and ∼10 km in depth, is a classical site to study earthquake processes. The largest earthquake in the region, the M 6.3 Koyna earthquake of December 1967, formed a ∼NNE-SSW trending surface rupture, known as Donichawadi fissure zone. The fissure zone, mapped originally over a length of ∼4 km and width of ∼200 m between Nanel and Kadoli by the Geological Survey of India (GSI) in the wake of the earthquake, comprises en-echelon fractures, near-vertical fissures, oblique or diagonal tensional cracks, mole tracks, soil lumps and laterite boulders in paddy cultivated land. We review the Donichawadi fissure zone in the light of extensive seismological data acquired in the past five decades, surface mapping studies, recent geophysical studies, soil-gas helium studies over the fissure zone during 1996–1997, chemical and noble gas isotope compositions of formation gases, and subsurface fracture data from downhole image logs in a 3 km - deep scientific borehole drilled in 2017. Integration of the datasets provide clinching evidence that the Donichawadi fissure zone is the surface manifestation of a deeper crustal fault (referred as Donichawadi fault) that has been active for more than 55 years and yield critical new insights on the geometry, distribution and possible subsurface disposition of the fissures and the associated fractures in the subsurface. We conclude that the Donichawadi fault offers a potential target for further deep probing through scientific drilling, downhole measurements and long-term monitoring to gain new insights into the genesis of triggered earthquakes in the area. |
| first_indexed | 2024-04-13T05:17:29Z |
| format | Article |
| id | doaj.art-8cf0e0730ad440e180bda53c7492d8ce |
| institution | Directory Open Access Journal |
| issn | 2590-0560 |
| language | English |
| last_indexed | 2024-04-13T05:17:29Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Asian Earth Sciences: X |
| spelling | doaj.art-8cf0e0730ad440e180bda53c7492d8ce2022-12-22T03:00:51ZengElsevierJournal of Asian Earth Sciences: X2590-05602022-12-018100123Fault associated with the 1967 M 6.3 Koyna earthquake, India: A review of recent studies and perspectives for further probingKunal Modak0Sunil Rohilla1Nagaraju Podugu2Deepjyoti Goswami3Sukanta Roy4Corresponding author.; Ministry of Earth Sciences, Borehole Geophysics Research Laboratory, Karad 415 105, IndiaMinistry of Earth Sciences, Borehole Geophysics Research Laboratory, Karad 415 105, IndiaMinistry of Earth Sciences, Borehole Geophysics Research Laboratory, Karad 415 105, IndiaMinistry of Earth Sciences, Borehole Geophysics Research Laboratory, Karad 415 105, IndiaMinistry of Earth Sciences, Borehole Geophysics Research Laboratory, Karad 415 105, IndiaThe Koyna region in western India, characterized by recurrent seismic activity over more than five decades and confined largely within a 20 km × 30 km area and ∼10 km in depth, is a classical site to study earthquake processes. The largest earthquake in the region, the M 6.3 Koyna earthquake of December 1967, formed a ∼NNE-SSW trending surface rupture, known as Donichawadi fissure zone. The fissure zone, mapped originally over a length of ∼4 km and width of ∼200 m between Nanel and Kadoli by the Geological Survey of India (GSI) in the wake of the earthquake, comprises en-echelon fractures, near-vertical fissures, oblique or diagonal tensional cracks, mole tracks, soil lumps and laterite boulders in paddy cultivated land. We review the Donichawadi fissure zone in the light of extensive seismological data acquired in the past five decades, surface mapping studies, recent geophysical studies, soil-gas helium studies over the fissure zone during 1996–1997, chemical and noble gas isotope compositions of formation gases, and subsurface fracture data from downhole image logs in a 3 km - deep scientific borehole drilled in 2017. Integration of the datasets provide clinching evidence that the Donichawadi fissure zone is the surface manifestation of a deeper crustal fault (referred as Donichawadi fault) that has been active for more than 55 years and yield critical new insights on the geometry, distribution and possible subsurface disposition of the fissures and the associated fractures in the subsurface. We conclude that the Donichawadi fault offers a potential target for further deep probing through scientific drilling, downhole measurements and long-term monitoring to gain new insights into the genesis of triggered earthquakes in the area.http://www.sciencedirect.com/science/article/pii/S2590056022000445Surface ruptureFault zoneScientific drillingReservoir triggered earthquakesKoynaDeccan traps |
| spellingShingle | Kunal Modak Sunil Rohilla Nagaraju Podugu Deepjyoti Goswami Sukanta Roy Fault associated with the 1967 M 6.3 Koyna earthquake, India: A review of recent studies and perspectives for further probing Journal of Asian Earth Sciences: X Surface rupture Fault zone Scientific drilling Reservoir triggered earthquakes Koyna Deccan traps |
| title | Fault associated with the 1967 M 6.3 Koyna earthquake, India: A review of recent studies and perspectives for further probing |
| title_full | Fault associated with the 1967 M 6.3 Koyna earthquake, India: A review of recent studies and perspectives for further probing |
| title_fullStr | Fault associated with the 1967 M 6.3 Koyna earthquake, India: A review of recent studies and perspectives for further probing |
| title_full_unstemmed | Fault associated with the 1967 M 6.3 Koyna earthquake, India: A review of recent studies and perspectives for further probing |
| title_short | Fault associated with the 1967 M 6.3 Koyna earthquake, India: A review of recent studies and perspectives for further probing |
| title_sort | fault associated with the 1967 m 6 3 koyna earthquake india a review of recent studies and perspectives for further probing |
| topic | Surface rupture Fault zone Scientific drilling Reservoir triggered earthquakes Koyna Deccan traps |
| url | http://www.sciencedirect.com/science/article/pii/S2590056022000445 |
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