Source parameters and fmax in Kameng region of Arunachal Lesser Himalaya

Kumar, Ashwani; Kumar, Arjun; Gupta, S. C.; Kumar, Rishabh

doi:10.1016/j.jseaes.2013.02.030

Cited by 28 publications

(14 citation statements)

References 28 publications

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“…Kumar (2011) and A. Kumar et al (2013) Himalayas, respectively. The difference in the relation between the current study and the other studies is mainly because of the magnitude and different earthquakes.…”

Section: Resultsmentioning

confidence: 99%

“…The mathematical model fitted in the observed acceleration spectrum is given as (A. Kumar et al, 2013) F I G U R E 2 Seismic station distribution (black triangles) to estimate source parameters in the Indo-Burma region. Red stars denote >5 magnitude earthquakes, blue circles denote quake magnitudes 3-3.9 and yellow circles denote magnitude 4-4.9…”

Section: Seismological Network and Data Setmentioning

confidence: 99%

“…where ρ = 2,700 kg/m 3 is the average density, V S is the average shear-wave velocity in the source zone (V S = 3.4 km/s), R is the source to receiver distance that accounts for geometrical spreading, R θϕ = 0.63 accounts for the average radiation pattern (Boore & Boatwright, 1984), and S a = 2 is the free surface amplification (A. Kumar et al, 2012Kumar et al, , 2013.…”

Section: Seismological Network and Data Setmentioning

confidence: 99%

“…Previously, source parameters have been estimated in different zones of the Himalayas, for example, the Kameng region in Arunachal Lesser Himalayas (A. Kumar, Kumar, Gupta, Mittal, & Kumar, 2013), Shillong-Mikir Plateau (Bora, 2016;Bora et al, 2013), Garhwal Himalayas (A. Kumar, 2011), the Koldam site in Himachal Lesser Himalayas (Paidi, Kumar, Gupta, & Kumar, 2013).…”

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confidence: 99%

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Source parameters and scaling relations for small to moderate earthquakes in theIndo‐BurmaRanges,North‐east India, and its seismotectonic implications

Bora¹,

Mukherjee

Singh

et al. 2021

Geological Journal

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One of the most tectonically active regions of the world is the Indo-Burma Ranges (IBR) of North-east (NE) India and its surrounding region. It has been considered as a natural laboratory for exploring the geodynamics and kinematics of the subduction system because of the undergoing complex tectonic processes (Gahalaut et al., 2016;Kayal, 2008). The region experienced two greatest earthquakes, the

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Section: Resultsmentioning

confidence: 99%

Section: Seismological Network and Data Setmentioning

confidence: 99%

Section: Seismological Network and Data Setmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Source parameters and scaling relations for small to moderate earthquakes in theIndo‐BurmaRanges,North‐east India, and its seismotectonic implications

Bora¹,

Mukherjee

Singh

et al. 2021

Geological Journal

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“…Like the other parts of Himalaya, the north-eastern Himalaya exhibits quiet high seismicity and lies within the seismic zone IV and zone V as per IS Code (IS 1893 (Part 1): 2002). Several earthquakes of smaller to moderate magnitudes have occurred in this region (Verma et al, 1976;Mukhopadhayay, 1984;Kayal, 1987;Kumar et al, , 2013a. The two great earthquakes namely Shillong (1897) and Assam (1950) earthquakes having magnitudes 8.1 and 8.6, respectively occurred in this region.…”

Section: Introductionmentioning

confidence: 97%

Empirical Attenuation relationship for Peak Ground Horizontal Acceleration for North-East Himalaya

Kumar

Ahluwalia

2017

TCCKHVTD

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North-East India is located in one of the most seismic prone areas of the world. India has faced several devastating earthquakes in the past. The largest of these have originated in the Himalayan plate boundary region, which has remained a region of great scientific and engineering interest. In spite of this, very little seismological information is available about North-East India, which is the focus for present study. Only few attenuation relationships are available for this region, which are most valuable in a region where too much strong motion recordings are not available. However in recent time, with the inception of 300 strong motion instruments under Indian National Strong Motion Network deployed under Mission Mode project (Government of India), a good quality of strong motion data became available. Taking the advantage of data collected by this network and earlier analogue strong motion arrays, an endeavor has been made to develop an empirical attenuation relationship for peak horizontal ground accelerations for North-East Himalayan region in India. The data set consists of 216 peak ground horizontal accelerations from 24 earthquakes (4.0≤M≤6.8) recorded by strong-motion arrays and National Strong Motion Network project in India. The present analysis uses a two-step stratified regression model. The estimated attenuation relationship for the region is log 1.497 0.3882 1.19 . )Where A is the peak ground acceleration (g), M is the magnitude, and X is the hypocentral distance from the source. The residual sum of squares is 0.1451. The obtained Empirical attenuation relationship will provide better insight for site specific studies as well as for hazard estimation for North-East Himalayan region. Attenuation relationships for expected peak ground acceleration (g) have been presented for magnitudes 5, 6, 7 and 8 for North-East Himalayan region.

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Estimation of source parameters and scaling relations for local earthquakes of Lohit Valley in Arunachal Himalaya, Northeast India

Kundu

Hazarika

2022

Geological Journal

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We estimate the source parameters (stress drop, corner frequency, source radius and scalar seismic moment) for local earthquakes that occurred during 2007–2008 in the Lohit Valley, Arunachal Himalaya in northeast India. The source parameters of 33 selected earthquakes (2.0 ≤ ML ≤ 4.4) are estimated by spectral analysis of P‐waves of the vertical component. The results are authenticated further by spectral analysis of S‐waves of horizontal component seismograms. Both P‐ and S‐wave spectral analyses show comparable results. The earthquakes' seismic moment varies from 2.66 × 1012 to 1.16 × 1015 N.m. The estimates of stress drop and source radius range from ~0.145 to 31.85 bar and ~242 to 647 m, respectively. The majority of the earthquakes show a low‐stress drop (≤10 bar). We interpret that the low‐stress drop is plausibly due to the presence of creeping patches in the thrust sheets in the study area within the upper ~10 km depth, which is not able to withstand much stress and release it in the forms of micro‐earthquakes. The scaling relations have been developed between important source parameters (ML, Mw, M0, ∆σ, and fc), which can serve as useful inputs for the assessment of earthquake hazards in the region.

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Source parameters and fmax in Kameng region of Arunachal Lesser Himalaya

Cited by 28 publications

References 28 publications

Source parameters and scaling relations for small to moderate earthquakes in theIndo‐BurmaRanges,North‐east India, and its seismotectonic implications

Source parameters and scaling relations for small to moderate earthquakes in theIndo‐BurmaRanges,North‐east India, and its seismotectonic implications

Empirical Attenuation relationship for Peak Ground Horizontal Acceleration for North-East Himalaya

Estimation of source parameters and scaling relations for local earthquakes of Lohit Valley in Arunachal Himalaya, Northeast India

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