Browsing by Author "KameshRaju, K.A."
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Morphotectonics of the Carlsberg Ridge between 62 degrees 20 minutes and 66 degrees 20 minutes E, northwest Indian Ocean
KameshRaju, K.A.; Chaubey, A.K.; Amarnath, D.; Mudholkar, A. (Elsevier, 2008)The segmentation pattern of 440 km long section of the Carlsberg Ridge between 62 degrees 20 minutes E and 66 degrees 20 minutes E, in the northwest Indian Ocean, has been studied using multibeam bathymetry and magnetic ... -
Multibeam bathymetric, gravity and magnetic studies over 79 degrees E fracture zone, central Indian basin
KameshRaju, K.A.; Ramprasad, T.; Kodagali, V.N.; Nair, R.R. (American Geophysical Union, 1993)A regional scale bathymetric map has been constructed for the 79 degrees E fracture zone (FZ) in the Central Indian Basin between 10 degrees 15'S and 14 degrees 45'S lat. and 78 degrees 55'E and 79 degrees 20'E long. using ... -
Nature of the Ambient Noise, Site Response, and Orientation of Ocean?Bottom Seismometers (OBSs): Scientific Results of a Passive Seismic Experiment in the Andaman Sea
Dewangan, P.; Reddy, R.; KameshRaju, K.A.; Singha, P.; Aswini, K.K.; Yatheesh, V.; Samudrala, K.; Shuhail, M. (Seismological Society of America, 2018)We analyze the nature of the ambient noise and site response for ocean?bottom seismometers (OBSs) deployed in the Andaman region. The probabilistic power spectral densities of the OBSs show that the noise level in the ... -
New insights into the tectonic evolution of the Andaman basin, northeast Indian Ocean
KameshRaju, K.A.; Ramprasad, T.; Rao, P.S.; Rao, B.R.; Varghese, J. (Elsevier, 2004)Multibeam swath bathymetry data acquired over an area of about 30 000 km 2 ,together with magnetic and single channel seismic data, have been analyzed to understand the tectonic evolution of the Andaman basin,northeast ... -
Occurrence of gas hydrates along the continental margins of India, particularly the Krishna-Godavari offshore basin
Ramana, M.V.; Ramprasad, T.; KameshRaju, K.A.; Desa, M. (Taylor and Francis, 2007)The presence of gas hydrates along the Indian continental margins has been inferred mainly from the bottom simulating reflection/reflector (BSR) and the gas hydrate stability zone thickness map of India. Multidisciplinary ... -
Possible detrital, diagenetic and hydrothermal sources for Holocene sediments of the Andaman backarc basin
Kurian, S.; Nath, B.N.; Ramaswamy, V.; Naman, D.; Rao, T.G.; KameshRaju, K.A.; Selvaraj, K.; Chen, C.T.A. (Elsevier, 2008)Three sediment cores near the spreading axis in the Andaman backarc basin (ABB) were studied for bulk and clay mineralogy, major, trace and rare earth element (REE) geochemistry in bulk and three selective leaches, to ... -
Recent cruise onboard R/V Sonne to the Carlsberg Ridge and the Andaman Sea
KameshRaju, K.A. (InterRidge, 2008)The NIO-RVS2 cruise from 17 Oct. - 1 Dec. 2007 was conducted as the second phase field program of the CS IR (India) - Network Program, “Tectonic and oceanic processes along the Indian ridge system and the back arc basins.” ... -
Regional gravity and magnetic studies over the continental margin of the Central West Coast of India
SubbaRaju, L.V.; KameshRaju, K.A.; Subrahmanyam, V.; Rao, D.G. (Springer-Verlag, 1990) -
Regional marine geophysical studies of the south western continental margin of India
Rao, D.G.; Bhattacharya, G.C.; SubbaRaju, L.V.; Ramana, M.V.; Subrahmanyam, V.; KameshRaju, K.A.; Ramprasad, T.; Chaubey, A.K. (Goa: National Inst of Oceanography, 1987)Integrated bathymetric, gravimetric, magnetic and multichannel seismic reflection studies were carried out on the south western continental margin of India along three regional profiles. The study area lies between 60 m ... -
Seafloor mapping of large areas using multibeam system - Indian experience
Kodagali, V.N.; KameshRaju, K.A.; Ramprasad, T. (1994)To identify unproductive and difficult terrains, a detailed picture of the seafloor was essential. Hence, the area was resurveyed using the multibeam system hydrosweep during 1990-93. A total of 300,000 sq.km area has been ... -
Segmentation and morphology of the Central Indian Ridge between 3°S and 11°S, Indian Ocean
KameshRaju, K.A.; Samudrala, K.; Drolia, R.K.; Amarnath, D.; Ramachandran, R.; Mudholkar, A.V. (Elsevier, 2012)The segmentation pattern of 750 km long Central Indian Ridge (CIR) between 3 degrees S and 11 degrees S latitudes in the Indian Ocean has been studied using multibeam bathymetry and magnetic data. Twelve ridge segments ... -
Seismotectonic evaluation of off Nicobar earthquake swarms, Andaman Sea
Aswini, K.K.; KameshRaju, K.A.; Dewangan, P.; Yatheesh, V.; Singha, P.; Reddy, T.R. (Elsevier, 2021)The Andaman Sea has experienced a number of earthquake swarms as a result of complex tectonics arising from oblique subduction, active volcanic arc, the backarc spreading center, and sliver fault systems. One of the most ... -
Slow spreading ridges of the Indian Ocean: An overview of marine geophysical investigations
KameshRaju, K.A.; Mudholkar, A.V.; Samudrala, K. (Indian Geophysical Union, 2016)Sparse and non-availability of high resolution geophysical data hindered the delineation of accurate morphology, structural configuration, tectonism and spreading history of Carlsberg Ridge (CR) and Central Indian Ridges ... -
Sub-surface magma movement inferred from low-frequency seismic events in the off-Nicobar region, Andaman Sea
Aswini, K.K.; Dewangan, P.; KameshRaju, K.A.; Yatheesh, V.; Singha, P.; Arya, L.; Reddy, T.R. (Nature Publishing Group, 2020)Monitoring volcanic activity along the submarine volcanoes that are usually induced by subsurface magmatism is a challenge. We present fresh set of Ocean Bottom Seismometer (OBS) data that shows geophysical evidence ... -
Tectonic and oceanic processes along the Indian Ocean Ridge system and back arc basin
Kaisary, S.; Ray, D.; KameshRaju, K.A. (National Inst. of Oceanography (CSIR); India, 2009) -
Tectonic and volcanic implications of a cratered seamount off Nicobar Island, Andaman Sea
KameshRaju, K.A.; Ray, D.; Mudholkar, A.V.; Murty, G.P.S.; Gahalaut, V.K.; Samudrala, K.; Paropkari, A.L.; Ramachandran, R.; SuryaPrakash, L. (Elsevier, 2012)The region of the Nicobar earthquake swarm of January 2005 has been explored during a recent cruise using multibeam swath bathymetry, seafloor imaging and TV-guided sampling to decipher the seafloor morphology, nature and ... -
Tectonics of the Andaman Backarc Basin-Present Understanding and Some Outstanding Questions
KameshRaju, K.A.; Aswini, K.K.; Yatheesh, V. (Springer, Cham, 2020)The Andaman Backarc Basin is characterized by active seafloor spreading spurred by the right stepping dextral shear imposed on the trans-basinal Sagaing-Andaman-Nicobar- Sumatra fault system and presents a complex tectonic ... -
The 2005 volcano-tectonic earthquake swarm in the Andaman Sea: Triggered by the 2004 great Sumatra-Andaman earthquake
Kundu, B.; Legrand, D.; Gahalaut, K.; Gahalaut, V.K.; Mahesh, P.; KameshRaju, K.A.; Catherine, J.K.; Ambikapthy, A.; Chadha, R.K. (American Geophysical Union, 2012)A 6 day duration earthquakes swarm occurred in the Andaman Sea, 31 days after the giant 2004 Sumatra-Andaman earthquake (Mw 9.2). The swarm occurred less than 100 km from the eastern edge of the 2004 earthquake rupture and ... -
The Indian ridge program
KameshRaju, K.A. (International Cooperation of Ridge-Crest Studies, 2005) -
The west Andaman fault and its influence on the aftershock pattern of the recent megathrust earthquakes in the Andaman-Sumatra region
KameshRaju, K.A.; Murty, G.P.S.; Amarnath, D.; MohanKumar, M.L. (American Geophysical Union, 2007)Distinctly different rupture patterns of December 2004 and March 2005 megathrust earthquakes occurred in the Andaman-Sumatra region suggest strong influence of tectonic and structural elements. We have analysed the shipboard ...