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On the Seismic Hazard Estimation in the Himalayan Seismic Zones
Abstract The seismic hazard parameter estimation using Maximum Likelihood Method (MLM) has been made in the Himalayas and adjoing regions on the basis of the procedure which utilizes mixed data containing incomplete files of large historical events (extreme part of the catalogue) and complete files of most recent earthquakes (complete part of the catalogue) with same threshold magnitude. The entire earthquake catalogues used covers the period from 1720–1990. The maximum regional magnitude, Mmax, the activity rate of seismic events, λ, the mean return period, R, of earthquakes with a certain lower magnitude, M ≥ m, as well as the parameter b of magnitude-frequency relationship have been determined for six seismic zones having different seismotectonic environments. High differences of the b parameters and hazard level from seismic zone I to VI reflect the high seismotectonic complexity and crustal heterogeneity, suggest that important project like hydroelectric project and town planning should preferably be located in the zones of lower hazard level.
On the Seismic Hazard Estimation in the Himalayan Seismic Zones
Abstract The seismic hazard parameter estimation using Maximum Likelihood Method (MLM) has been made in the Himalayas and adjoing regions on the basis of the procedure which utilizes mixed data containing incomplete files of large historical events (extreme part of the catalogue) and complete files of most recent earthquakes (complete part of the catalogue) with same threshold magnitude. The entire earthquake catalogues used covers the period from 1720–1990. The maximum regional magnitude, Mmax, the activity rate of seismic events, λ, the mean return period, R, of earthquakes with a certain lower magnitude, M ≥ m, as well as the parameter b of magnitude-frequency relationship have been determined for six seismic zones having different seismotectonic environments. High differences of the b parameters and hazard level from seismic zone I to VI reflect the high seismotectonic complexity and crustal heterogeneity, suggest that important project like hydroelectric project and town planning should preferably be located in the zones of lower hazard level.
On the Seismic Hazard Estimation in the Himalayan Seismic Zones
Shanker, D. (author)
2000
Article (Journal)
English
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