Refine your search
Collections
Co-Authors
Journals
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Chopra, Sumer
- Earthquake Swarm Activities after Rains in Peninsular India and a Case Study from Jamnagar
Abstract Views :242 |
PDF Views:2
Authors
Sumer Chopra
1,
K. Madhusudhan Rao
1,
B. Sairam
1,
Santosh Kumar
1,
A. K. Gupta
1,
Hardik Patel
1,
M. S. Gadhavi
1,
B. K. Rastogi
1
Affiliations
1 Institute of Seismological Research, Sector-18, Gandhinagar - 382 018, IN
1 Institute of Seismological Research, Sector-18, Gandhinagar - 382 018, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 72, No 2 (2008), Pagination: 245-252Abstract
About 200 shocks were felt and over 50 of M-2 to 4 were located south of Jamnagar in 2006 and same number was felt/located again in 2007 with blast like subterranean sounds soon after heavy rains. Most of the shocks have shallow focal depth of less than 10 km. Some of the tremors have caused cracks in a few houses. During September-October 2006 tremors were confined withm 5 km of Khankotda village which is about 30 km SE of Jamnagar. During August-September 2007 the activity had spread northward up to Jamnagar. Some shocks have occurred about 20-25 km west of this trend faults/lineaments/dykes in the area are studied to identify the causative feature for the tremors. The rainfall data of the district and water level data of nearby observation wells are studied to see any possible relationship with earthquake activity. Data of about hundred cases of swarm type of earthquake sequences in the peninsular India in last several decades are compiled to study their characteristics vis-a-vis monsoons.Keywords
Swarm-Type of Earthquakes, Subterranean Sounds, Saurashtra Seismicity.
- Institute of Seismological Research, Gujarat
Abstract Views :183 |
PDF Views:137
Authors
Affiliations
1 ISR Gandhinagar, Gujarat, IN
1 ISR Gandhinagar, Gujarat, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 74, No 4 (2009), Pagination: 537-537Abstract
No Abstract.Full Text
- Shallow Subsurface Investigations for Resource Exploration and Hazard Estimation
Abstract Views :237 |
PDF Views:78
Authors
Affiliations
1 Institute of Seismological Research, Gandhinagar 382 421, IN
1 Institute of Seismological Research, Gandhinagar 382 421, IN
Source
Current Science, Vol 113, No 03 (2017), Pagination: 379-380Abstract
The international workshop which held at ISR, Gandhinagar encompassed five major themes, namely: (i) Exploration of groundwater and minerals; (ii) Geothermal resource mapping; (iii) Air and space-borne geophysical investigations; (iv) Active fault mapping; (v) Seismic hazard assessment (SHA): macro-micro and site specific and societal impact of SHA.Full Text
- Earthquake swarms in Palghar district, Maharashtra, Deccan Volcanic Province
Abstract Views :424 |
PDF Views:78
Authors
Affiliations
1 Institute of Seismological Research, Raisan, Gandhinagar 382 009, IN
1 Institute of Seismological Research, Raisan, Gandhinagar 382 009, IN
Source
Current Science, Vol 118, No 5 (2020), Pagination: 701-704Abstract
The Palghar district of Maharashtra falls in zone III of the seismic zoning map of India, where earthquakes up to magnitude 6.0 can occur1. A swarm activity was started in the Palghar district of Maharashtra in November 2018 and is still continuing (till the end of November 2019). According to reports from the National Centre for Seismology (NCS), more than 1,000 earthquakes of micro-tominor magnitude have occurred in the Dahanu and Talasari talukas of Palghar district, from 3 November 2018 to 15 February 2019. The biggest tremor of magnitude ML 3.7 was recorded on 1 February 2019, at 3.54 PM (IST). The people of Dahanu and Talasari talukas were panicked by the abnormal ground vibration and burst sound that they felt. In fact, Jawahar city in Palghar district has experienced swarms several times earlier.Full Text
References
- Bureau of Indian Standards, Criteria for Earthquake Resistant Design of Structures, 2002, fifth revision, p. 39.
- National Centre for Seismology, Ministry of Earth Sciences, New Delhi; https://www.moes.gov.in/programmes/national-centre-seismology
- Chandra, U., Bull. Seismol. Soc. Am., 1977, 67, 1387–1413.
- Mohan, G., Surve, G. and Tiwarari, P. K., Curr. Sci., 2007, 93, 991–996.
- Biswas, S. K., Tectonophysics, 1987, 135, 307–327.
- Dessai, A. G. and Bertrand, H., Tectonophysics, 1995, 241, 165–178.
- Seismotectonic Atlas of India and its Environs, Geological Survey of India, Special Publication number, 59, Kolkata, 2000.
- Chopra, S. et al., Seismol. Res. Lett., 2008, 79, 799–808.
- Havskov, J. and Ottemoller, L., SEISAN: The Earthquake Analysis Software for Windows, Solaris and Linux, Version 8.0, Institute of Solid Earth Physics, University of Bergen, Bergen, Norway, 2003, pp. 1–400.
- Lienert, B. R. E. and Havskov, J., Seismol. Res. Lett., 1995, 66, 26–36.
- Joshi, V., Chopra, S., Mahesh, P. and Kumar, S., Seismol. Res. Lett., 2017; doi:10.1785/0220160203.
- Waldhauser, F. and Ellsworth, W. L., Bull. Seismol. Soc. Am., 2000, 90, 1353– 1368.
- Sokos, E. N. and Zahradnik, J., ISOLA: A Matlab GUI for use with ISOLA fortran codes, USER’s Guide, 2000, Ver. 2.5, p. 34.
- Sateesh, A., Mahesh, P., Singh, A. P., Kumar, S., Chopra, S. and Ravi Kumar, M., Environ. Earth Sci., 2019, 78, 381; doi: 10.1007/s12665-019-8382-1.
- Chopra, S. et al., J. Geol. Soc. India, 2008, 72, 245–252.
- Bhattacharya, S. N. and Dattatrayam, R. S., Gondwana Geol. Magz., 2003, v5, 67–85.
- Srinagesh, D. et al., Geol. Soc. India, 2015, 85, 419–430.
- Geoelectrical Study for Groundwater Resources in Parts of the Ahmedabad and Gandhinagar Cities, Gujarat, India
Abstract Views :109 |
PDF Views:65
Authors
Rakesh Nikam
1,
G. Pavankumar
2,
Vasu Pancholi
1,
Dilip Singh
1,
Mehul Nagar
1,
D. Nagarjuna
2,
Sumer Chopra
1
Affiliations
1 Institute of Seismological Research, Gandhinagar 382 009, IN
2 CSIR-National Geophysical Research Institute, Hyderabad 500 007, IN
1 Institute of Seismological Research, Gandhinagar 382 009, IN
2 CSIR-National Geophysical Research Institute, Hyderabad 500 007, IN
Source
Current Science, Vol 124, No 3 (2023), Pagination: 340-347Abstract
The central alluvial plains of Gujarat, western India, consist of deposits of north–south flowing rivers from the Aravalli hills. The Gandhinagar and Ahmedabad districts in the state form a part of the Cambay basin and are occupied by Quaternary alluvium comprising mainly of sand, gravel, silt clay, kankar, etc. Direct current (DC) electrical resistivity studies have been carried out at six sites in Gandhinagar and Ahmedabad cities to map groundwater levels and major shallow subsurface geoelectric layers using a 72-electrode resistivity imaging system. Two dimensional (2D) resistivity models and borehole data infer a multilayered aquifer system in Ahmedabad. The top confined aquifer is at a depth of 22–25 m and the second unconfined aquifer is at a 60–65 m depth. These two aquifers are separated by highly compacted clay/clayey sand. For the two locations in Ahmedabad city, the 2D resistivity model suggests 10–15 m variation in the groundwater level. In Gandhinagar, as the survey location is close to the Sabarmati River and the exploitation of groundwater is less than in Ahmedabad, the groundwater table is at shallow level. Further, the resistivity estimates suggest that, at all three locations, the groundwater is moderately saline. The infer resistivity sections are correlated with groundwater level and borehole dataKeywords
Aquifers, Borehole Data, Groundwater, Sedimentary Basins, Two-Dimensional Resistivity Imaging.Full Text
References
- Kumar, G. P., Mahender, E., Singh, Y. K., Mahesh, P. and Mohan, K., Delineation of aquifer layer along Anjar–Rapar corridor, eastern Kachchh basin, Gujarat using electromagnetic investigations. J. Indian Geophys. Union, 2016, 20, 201–208.
- Aktarakci, H. K., Harthill, H. and Blohm, M. W., Time domain electromagnetic survey for gold exploration, Nevada. Geophysics, 1977, 62, 1409–1418.
- Ebraheem, A. M., Hamburger, M. W., Bayless, E. R. and Krothe, N. C., A study of acid mine drainage using earth resistivity measurements. Ground Water, 1990, 28, 361–368.
- Danielsen, J. E., Auken, E., Jørgensena, F., Søndergaard, V. and Sørensena, K. I., The application of the transient electromagnetic method in hydrogeophysical surveys. J. Appl. Geophys., 2003, 53, 181–198.
- Carrasquilla, A. and Ulugergerli, E., Evolution of the transient electromagnetic geophysical method for stratigraphic mapping and hydrogeological delineation in Campos Basin, Brazil. Rev. Bras. Geofis., 2006, 24(3), 333–341.
- Yadav, G. S., Dasgupta, A. S., Sinha, R., Lal, T., Srivastava, K. M. and Singh, S. K., Shallow sub-surface stratigraphy of interfluves inferred from vertical electric soundings in western Ganga plains, India. Quaternary Int., 2010, 227, 104–115.
- Manglik, A., Verma, S. K., Muralidharan, D. and Sasmal, R. P., Electrical and electromagnetic investigations for HVDC ground electrode sites in India. J. Phys. Chem. Earth, 2011, 36, 1405–1411.
- Sinha, R., Yadav, G. S., Gupta, S., Singh, A. and Lahiri, S. K., Geo-electric resistivity evidence for subsurface paleochannel systems adjacent to Harappan sites in northwest India. Quaternary Int., 2013, 308–309, 66–75.
- Rai, S. N., Thiagarajan, S., Ratna Kumari, Y., Anand Rao, V. and Manglik, A., Delineation of aquifers in basaltic hard rock terrain using vertical electrical soundings data. J. Earth Syst. Sci., 2013, 122, 29–41.
- Pavan, K. G., Mahesh, P., Nagar, M., Mahender, E., Kumar, V., Kapil, M. and Ravi, K. M., Role of deep crustal fluids in the genesis of intraplate earthquakes in the Kachchh region, northwestern India. Geophys. Res. Lett., 2017, 44, 4054–4063; doi:10.1002/ 2017GL072936.
- Pancholi, V., Vinay, D., Bhatt, N., Chaudhary, P. and Chopra, S., Geotechnical investigation for estimation of liquefaction hazard for the capital city of Gujarat State, western India. Geotech. Geol. Eng., 2020, 38, 6551–6570.
- Verma, R. K., Ground water brochure, Gandhinagar district, Gujarat. Technical Report Series, 2014; http://cgwb.gov.in/District_Profile/Gujarat/GANDHINAGAR.pdf
- Biswas, S. K., A review of structure and tectonics of Kutch basin, western India, with special reference to earthquakes. Curr. Sci., 2005, 88(10), 1592–1600.
- Merh, S. S., Geology of Gujarat, Geological Society of India, 1995, pp. 102–124.
- Loke, M. H., Rapid 2-D resistivity and IP inversion using the least-square method. Manual for Res2dinv Software, 2004, 3(54), 53.
- Griffiths, D. H. and Barker, R. D., Two-dimensional resistivity imaging and modelling in areas of complex geology. J. Appl. Geophys., 1993, 29, 211–226.
- Loke, M. H., Software: RES2DINV. 2D interpretation for DC resistivity and IP for Windows 95. Copyright by M.H. Loke, Malaysia, 1997.
- Vinay, K. D., Dube, R., Pancholi, V., Mohan, M., Pawan, S., Sairam, B., Chopra, S. and Rastogi, B., Multi-criteria study for seismic hazard assessment of UNESCO world heritage Ahmedabad city, Gujarat, western India. Bull. Eng. Geol. Environ., 2019, 79, 1721–1733.