Journal Publications

submitted manuscripts:

Maitreyi, Singh, C., Singh, A, Uthaman, M., Sarkar, S., Kumar, G., Dutta, A., Siddiqui, A.S., & Bose, S. Evaluating seismic station quality in north Chhattisgarh through ambient noise analysis. GEOMAT NAT HAZ RISK

Uthaman, M., Singh, A., Singh, C., Obermann, A., Hetényi, G., Dutta, A., & Kumar, G. Structural variation across the Sikkim Himalaya revealed by ambient noise tomography. JGRSE

Peer-reviewed journal papers:

Uthaman, M., Singh, C., Singh, A., Hetényi, G., Dutta, A., Kumar, G. and Dubey, A.K., 2024. Complex multi‐fault dynamics in Sikkim Himalaya: New insights from local earthquake analysis. Geochemistry, Geophysics, Geosystems, 25(6), p.e2023GC011363. https://doi.org/10.1029/2023GC011363

High resolution local earthquake catalog for Sikkim Himalaya recorded at the longest running seismic network
Delineation of possible seismogenic extent of the highly debated Dhubri-Chungthang Fault Zone
Evidence of lower crustal earthquakes along imbricated Moho

Singh, A., Kumar, G., Singh, C., Kumar, M.R., Uthaman, M., Vadlamani, R., Dutta, A., Saikia, D. and Dubey, A.K., 2024. Evidence for an imbricated lower crust and its role in accommodating crustal shortening in Sikkim Himalaya. Tectonics, 43(6), p.e2023TC008044. https://doi.org/10.1029/2023TC008044

Receiver functions computed using new data from a network deployed in Sikkim Himalaya
Intermittent arrivals at mid-crustal depths signify a complex nature of the décollement surface
Evidence for imbrication indicating brittle nature of the lower crust accommodating active shortening

Sarkar, S., Singh, C., Tiwari, A. K., Kumar, M. R., Dubey, A. K., Dutta, A., Kumar, G., & Singh, A. 2-D Sn wave attenuation tomography beneath the eastern Himalaya. Geophys. J. Int., 237(3), pp.1490-1504. https://doi.org/10.1093/gji/ggae123.

The seismic attenuation of the uppermost mantle by measuring the quality factor of the Sn wave (SnQ) to understand the dynamics of the lithospheric mantle and the cause of the seismic anomalies beneath eastern Himalaya.

Kumar, G., Singh, A., Tiwari, A. K., Singh, C., Kumar, M. R., Saikia, D., Uthaman, M. & Dubey, A. K. (2023) Alteration in the mantle transition zone structure beneath Sikkim and adjoining Himalaya in the response of the Indian plate subduction. J. Asian Earth Sci., 255. https://doi.org/10.1016/j.jseaes.2023.105768.

Mapping of upper mantle discontinuities beneath study region using P wave receiver functions.
Predominance of uplifted d410 and d660 in response to presence of thick Indian lithosphere.
Low velocity zones at ∼350 km reflects compositional changes due to prior subduction of Indian plate.

Uthaman, M., Singh, A., Singh, C., Dubey, A. & Kumar, G., (2021). Discerning structure and seismic hazards in the Sikkim Himalayas. Eos, 102. https://doi.org/10.1029/2021EO156044.

A dense seismic network in operation since 2019 will provide new insights into the tectonics of seismically active Himalayan regions.

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