Natural Hazards

, Volume 52, Issue 2, pp 299–317

Expected peak ground acceleration in Uttarakhand Himalaya, India region from a deterministic hazard model

Original Paper

DOI: 10.1007/s11069-009-9373-4

Cite this article as:
Joshi, A. & Mohan, K. Nat Hazards (2010) 52: 299. doi:10.1007/s11069-009-9373-4

Abstract

A method of seismic zonation based on the deterministic modeling of rupture planes is presented. Finite rupture planes along identified lineaments are modeled in the Uttarakhand Himalaya based on the semi empirical technique of Midorikawa (Tectonophysics 218:287–295, 1993). The expected peak ground acceleration thus estimated from this technique is divided into different zones similar to zones proposed by the Bureau of Indian standard, BIS (Indian standards code of practice for earthquake-resistant design of structures, 2002). The proposed technique has been applied to Kumaon Himalaya area and the surrounding region for earthquakes of magnitude M > 6.0. Approximately 56000 km2 study area is classified into the highest hazard zone V with peak accelerations of more than 400 cm/s2. This zone V includes the cities of the Dharchula, Almora, Nainital, Haridwar, Okhimath, Uttarkashi, Pithorahargh, Lohaghat, Munsiari, Rudraprayag, and Karnprayag. The Sobla and Gopeshwar regions belong to zone IV, where peak ground accelerations of the order from 250 to 400 cm/s2 can be expected. The prepared map shows that epicenters of many past earthquakes in this region lie in zone V, and hence indicating the utility of developed map in defining various seismic zones.

Keywords

Deterministic modelingSemi empirical techniqueExpected peak ground acceleration

Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  1. 1.Department of Earth SciencesIndian Institute of Technology (IIT)RoorkeeIndia
  2. 2.Institute of Seismological Research (ISR)Raisan, GandhinagarIndia