Geology

Judgment of the National Green Tribunal regarding illegal mining of soapstone in village Papon, Bageshwar district, Uttarakhand, 22/04/2025

Judgment of the National Green Tribunal in the matter of Raghubir Singh Garia Vs State of Uttarakhand & Others dated 22/04/2025. The matter related to illegal mining of soap stone in village Papon, District Bageshwar, Uttarakhand. The complainant, a resident of the village said that illegal mining of soap stone …

Strong motion data analysis of the 4 April 2011 Western Nepal earthquake (M 5.7) and its implications to the seismic hazard in the Central Himalaya

In the present study, the strong motion data of the 4 April 2011 western Nepal earthquake (M 5.7) recorded by a dense network of 24 strong motion accelerograph stations have been used to estimate horizontal and vertical component of the peak ground acceleration (PGA) to better understand its bearing on …

Spatial distributions of earthquake-induced landslides and hillslope preconditioning in the northwest South Island, New Zealand

Current models to explain regional-scale landslide events are not able to account for the possible effects of the legacy of previous earthquakes, which have triggered landslides in the past and are known to drive damage accumulation in brittle hillslope materials. This paper tests the hypothesis that spatial distributions of earthquake-induced …

Geological and geotechnical characterisation of Ramagundam opencast-II of Singareni Collieries using geophysical logs

Deep and large opencast coal mines of 400m to 450m depth are considered important to increase the coal production of India. Planning and managing such large open pits depends upon a thorough understanding of geological and geotechnical aspects of the rock strata comprising the overburden column. The experiences of Singareni …

Observed latitudinal variations in erosion as a function of glacier dynamics

Glacial erosion is fundamental to our understanding of the role of Cenozoic-era climate change in the development of topography worldwide, yet the factors that control the rate of erosion by ice remain poorly understood. In many tectonically active mountain ranges, glaciers have been inferred to be highly erosive, and conditions …

Regional trends and controlling factors of fatal landslides in Latin America and the Caribbean

A new data set of landslides that caused loss of life in Latin America and the Caribbean in the 10-year period from 2004 and 2013 inclusive has been compiled, providing new insight into the impact of landslides in this key part of the world. This data set indicates that in …

Seismogenic active fault zone between 2005 Kashmir and 1905 Kangra earthquake meizoseismal regions and earthquake hazard in eastern Kashmir seismic gap

The 2005 Kashmir earthquake of magnitude Mw 7.6 produced 75 km surface rupture showing 3–7 m vertical offset. The surface rupture nearly coinciding with the bedrock geology-defined Balakot-Bagh Fault (BBF) indicates reactivation of the fault. The BBF extends SE with right-step to the Reasi Thrust in Jammu region. Further SE …

Slip pulse and resonance of Kathmandu basin during the 2015 Mw 7.8 Gorkha earthquake, Nepal imaged with geodesy

Detailed geodetic imaging of earthquake rupture enhances our understanding of earthquake physics and induced ground shaking. The April 25, 2015 Mw 7.8 Gorkha, Nepal earthquake is the first example of a large continental megathrust rupture beneath a high-rate (5 Hz) GPS network. We use GPS and InSAR data to model …

Lower edge of locked Main Himalayan Thrust unzipped by the 2015 Gorkha earthquake

Large earthquakes are thought to release strain on previously locked faults. However, the details of how earthquakes are initiated, grow and terminate in relation to pre-seismically locked and creeping patches is unclear. The 2015 Mw 7.8 Gorkha, Nepal earthquake occurred close to Kathmandu in a region where the prior pattern …

Lower edge of locked Main Himalayan Thrust unzipped by the 2015 Gorkha earthquake

Large earthquakes are thought to release strain on previously locked faults. However, the details of how earthquakes are initiated, grow and terminate in relation to pre-seismically locked and creeping patches is unclear1, 2, 3, 4. The 2015 Mw 7.8 Gorkha, Nepal earthquake occurred close to Kathmandu in a region where …

Tectonic framework and evolutionary history of the Bengal Basin in the Indian subcontinent

The Bengal Basin evolved as a rift-controlled extensional basin along the NNE–SSW trending Basin Margin Fault coevally with the 85 East Ridge in the Bay of Bengal during the short-lived hotspot activity south of Bhubaneswar. The basin opening post-dated the Kereguelen Plume magmatism (at ~116 Ma), but predated the phase …

The Kallisti Limnes, carbon dioxide-accumulating subsea pools

Natural CO2 releases from shallow marine hydrothermal vents are assumed to mix into the water column, and not accumulate into stratified seafloor pools. We present newly discovered shallow subsea pools located within the Santorini volcanic caldera of the Southern Aegean Sea, Greece, that accumulate CO2 emissions from geologic reservoirs. This …

The 25 April 2015 Nepal earthquake and its aftershocks

The massive Mw = 7.8 earthquake which rocked the Nepal Himalaya on 25 April 2015 is the largest to have occurred in this region in the past 81 years. This event occurred by slip on a ~150 km long and 55 km wide, shallow dipping (~5) segment of the Main …

Landslide susceptibility zonation of Tehri reservoir rim region using binary logistic regression model

A remote sensing and GIS based landslide susceptibility zonation (LSZ) of the Tehri reservoir rim region has been presented here. Landslide causal factors such as land use/land cover, photo-lineaments, landslide incidences, drainage, slope, aspect, relative relief, topographic wetness index and stream power index were derived from remote sensing data. Ancillary …

The May 21st , 2014 Bay of Bengal earthquake: implications for intraplate stress regime

The northeastern part of the Indian Ocean, i.e. the Bay of Bengal (BoB) is located near some of the most complicated tectonic zones on the Earth. An earthquake of magnitude ~6.0 occurred on 21 May 2014 near the coast of Odisha. Occasional moderate to large earthquakes in BoB highlight the …

Japanese geologist warns of coming tsunami to hit Taiwan

TAIPEI – A Japanese geologist said Tuesday that a massive earthquake-generated tsunami originating in Japan and capable of affecting Taiwan is likely to occur every 1,000 years, a prediction likely to worry antinuclear activists who have been campaigning for the abolition of nuclear energy on the earthquake-prone island. Yoshinobu Tsuji …

An interdisciplinary perspective on social and physical determinants of seismic risk

While disaster studies researchers usually view risk as a function of hazard, exposure, and vulnerability, few studies have systematically examined the relationships among the various physical and socioeconomic determinants underlying disasters, and fewer have done so through seismic risk analysis. In the context of the 1999 Chi-Chi earthquake in Taiwan, …

Northern California overdue for big quake, study says

SAN FRANCISCO – Three fault segments running beneath Northern California and its roughly 15 million people are overdue for a major earthquake, including one section that lies near the dams and canals that supply much of the state’s water, according to a geological study published on Monday. The three fault …

Paleotsunami evidence on Kaua‘i and numerical modeling of a great Aleutian tsunami

The Hawaiian Islands' location in the middle of the Pacific Ocean is threatened by tsunamis from great earthquakes in nearly all directions. Historical great earthquakes Mw > 8.5 in the last 100 years have produced large inundations and loss of life in the islands but cannot account for a substantial …

Earthquake source characteristics along the arcuate Himalayan belt: Geodynamic implications

The occurrences of moderate to large magnitude earthquakes and associated subsurface geological processes were critically examined in the backdrop of Indian plate obliquity, stress obliquity, topography, and the late Tertiary regional tectonics for understanding the evolving dynamics and kinematics in the central part of the Himalayas. The higher topographic areas …

A seismologically consistent compositional model of Earth’s core

Earth’s core is less dense than iron, and therefore it must contain “light elements,” such as S, Si, O, or C. We use ab initio molecular dynamics to calculate the density and bulk sound velocity in liquid metal alloys at the pressure and temperature conditions of Earth’s outer core. We …

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