T. Kandel

Tribhuvan University Teaching Hospital

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Laurent Bollinger

Commissariat à l'Énergie Atomique et aux Énergies Alternatives

Lok Bijaya Adhikari

Government of Nepal

Chintan Timsina

National Society for Earthquake Technology

Binod Prasad Koirala

Swiss Federal Laboratories for Materials Science and Technology

Magali Riesner

Commissariat à l'Énergie Atomique et aux Énergies Alternatives

R.M. Gupta

National Central University

Roser Hoste-Colomer

Bureau de Recherches Géologiques et Minières

M. Bhattarai

Government of Nepal

Judith Hubbard

Insight (China)

Amaury Vallage

CEA DAM Île-de-France

Cooperative Institutions

Centre National de la Recherche Scientifique

CEA DAM Île-de-France

Commissariat à l'Énergie Atomique et aux Énergies Alternatives

Université Paris Cité

Government of Nepal

Institut de physique du globe de Paris

California Institute of Technology

Sorbonne Paris Cité

Institut des Sciences de la Terre

Earth Observatory of Singapore

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Himalayan Main Boundary Thrust reactivation as a normal fault: constraints and implications for the seismic cycle in western Nepal

EGU General Assembly Conference Abstracts (2019)

Magali Riesner Laurent Bollinger Judith Hubbard Cyrielle Guérin Amaury Vallage

Normal fault

Source

Cite

Citations (0)

Lateral uniformity of India Plate strength over central and eastern Nepal

Geophysical Journal International (2013)

Théo Berthet György Hetényi Rodolphe Cattin Soma Nath Sapkota Cédric Champollion

The current understanding of the Himalayan lithosphere stems mostly from cross-sections through the range at the longitude of the Kathmandu Basin. In this paper we laterally extend the analyses of structures and rheology along the Nepal Himalayas between the Pokhara valley and the Arun river. We take advantage of available information and a new data set including gravity measurements and a receiver function profile. It appears that the geometry of the Moho inferred from seismological profiles and long-wavelength gravity anomalies does not exhibit major East–West variations within the 350-km-wide study area. Using thermomechanical modelling, we show that the northward deepening of the Moho observed along profiles perpendicular to the main thrust faults can be interpreted simply as the bending of a strong India Plate. This result suggests a gradual mechanical decoupling between the crust and the mantle, leading to a northward decrease of the effective elastic thickness of the Indian lithosphere from ∼75 km to ∼25 km beneath the Ganga Basin and the Tibetan Plateau, respectively. Our results also confirm (partially) eclogitized lower Indian crust beneath southern Tibet. At shorter wavelengths, the observed gravity profiles exhibit some small lateral variations that can be interpreted in terms of east–west variations of the thickness of subsurface geological structures such as the Ganga Basin and the Tethyan Sedimentary Sequence.

Receiver function

Longitude

Indian Shield

10.1093/gji/ggt357

Cite

Citations (29)

Lateral variations of the midcrustal seismicity in western Nepal: Seismotectonic implications

Earth and Planetary Science Letters (2018)

Roser Hoste-Colomer Laurent Bollinger H. Lyon‐Caen Lok Bijaya Adhikari C. Baillard

Seismotectonics

10.1016/j.epsl.2018.09.041

Cite

Citations (29)

Slip pulse and resonance of the Kathmandu basin during the 2015 Gorkha earthquake, Nepal

Science (2015)

J. Galetzka Diego Melgar J. F. Genrich Jianghui Geng S. E. Owen

Detailed geodetic imaging of earthquake ruptures enhances our understanding of earthquake physics and associated ground shaking. The 25 April 2015 moment magnitude 7.8 earthquake in Gorkha, Nepal was the first large continental megathrust rupture to have occurred beneath a high-rate (5-hertz) Global Positioning System (GPS) network. We used GPS and interferometric synthetic aperture radar data to model the earthquake rupture as a slip pulse ~20 kilometers in width, ~6 seconds in duration, and with a peak sliding velocity of 1.1 meters per second, which propagated toward the Kathmandu basin at ~3.3 kilometers per second over ~140 kilometers. The smooth slip onset, indicating a large (~5-meter) slip-weakening distance, caused moderate ground shaking at high frequencies (>1 hertz; peak ground acceleration, ~16% of Earth's gravity) and minimized damage to vernacular dwellings. Whole-basin resonance at a period of 4 to 5 seconds caused the collapse of tall structures, including cultural artifacts.

Moment magnitude scale

10.1126/science.aac6383

Cite

Citations (335)

Surface ruptures of large Himalayan earthquakes in Western Nepal: Evidence along a reactivated strand of the Main Boundary Thrust

Earth and Planetary Science Letters (2015)

T. Hossler Laurent Bollinger S. N. Sapkota Jérôme Lavé R.M. Gupta

Alluvial fan

Thrust fault

Paleoseismology

Chronology

10.1016/j.epsl.2015.11.042

Cite

Citations (49)

Automatic hypocenter determination for the aftershocks of the 2015 Gorkha earthquake, Nepal

AGU Fall Meeting Abstracts (2018)

Mamoru Yamada T. Kandel Koji Tamaribuchi

Hypocenter

Source

Cite

Citations (0)

Evidence for Crustal Extension in the Main Himalayan Thrust Hanging Wall During the Latest Great Himalayan Earthquake in Western Nepal

AGU Fall Meeting Abstracts (2019)

Magali Riesner Laurent Bollinger Judith Hubbard Cyrielle Guérin Amaury Vallage

Source

Cite

Citations (1)

The aftershock sequence of the 2015 April 25 Gorkha–Nepal earthquake

Geophysical Journal International (2015)

Lok Bijaya Adhikari Umesh Gautam Binod Prasad Koirala M. Bhattarai T. Kandel

The M 7.8 2015 April 25 Gorkha earthquake devastated the mountainous southern rim of the High Himalayan range in central Nepal. The main shock was followed by 553 earthquakes of local magnitude greater than 4.0 within the first 45 days. In this study, we present and qualify the bulletin of the permanent National Seismological Centre network to determine the spatio-temporal distribution of the aftershocks. The Gorkha sequence defines a ∼140-km-long ESE trending structure, parallel to the mountain range, abutting on the presumed extension of the rupture plane of the 1934 M 8.4 earthquake. In addition, we observe a second seismicity belt located southward, under the Kathmandu basin and in the northern part of the Mahabarat range. Many aftershocks of the Gorkha earthquake sequence have been felt by the 3 millions inhabitants of the Kathmandu valley.

Sequence (biology)

10.1093/gji/ggv412

Cite

Citations (124)

Seismicity in Far Western Nepal reveals flats and ramps along the Main Himalayan Thrust

AGU Fall Meeting Abstracts (2019)

Marine Laporte Laurent Bollinger Roser Hoste-Colomer H. Lyon‐Caen Clara Duverger

Thrust fault

Source

Cite

Citations (0)

High-frequency coda wave attenuation in the Mid and Far-Western region of the Nepal Himalaya

Journal of Nepal Geological Society (2024)

T. Kandel Gautam Prashad Khanal Krishna Kumar Pandey

In this study, we utilized the vertical components seismograms of 111 local earthquakes (Ml 2.5-5.5) recorded at fourteen stations by the HiKNet network, to present the first-ever estimate of the high-frequency coda waves attenuation in the Mid and Far-Western region of Nepal Himalaya. The inverse of coda wave attenuation, Qc (quality factor) is estimated at eight central frequencies of 1.5, 3.0, 6.0, 9.0, 12.0, 15.0, 18.0, and 21.0 Hz through 30 s coda window length by using the single back-scattering model. Our findings are expressed in terms of the (Qc) quality factor, showing a clear frequency-dependent power relation, Qc (f) = Q0 f n where Q0 is Qc at 1 Hz, f is the frequency and n represents the degree of frequency dependence. The estimated average quality factor (Intrinsic and scattering quality factor) of all these seismic stations was obtained asat 30 s coda window length, which represents the highly heterogeneous and seismo-tectonically active region. The relatively lower quality factor (Qc) value was obtained around Bajhang compared to the Mugu and Dailekh seismic belts. The Q0 and n obtained in this study are consistent with previous research in the Central Region of the Nepal Himalaya and results with similar tectonic settings from other seismically active regions.

Coda

10.3126/jngs.v67i1.74583

Cite

Citations (0)