Journal of Seismology

, Volume 4, Issue 2, pp 143–160

Modelling of rupture planes for peak ground accelerations and its application to the isoseismal map of MMI scale in Indian region

  • A. Joshi
Article
  • 81 Downloads

Abstract

The rupture plane for an earthquake has been modelledby using the semi empirical technique of Midorikawa(1993). This technique estimates ground accelerationby modelling the rupture process during an earthquake.Modifications in this technique have been made for itsapplication to the Indian region. This has been tested forthe Uttarkashi earthquake of 20th Oct, 1991, India, whichwas well recorded at thirteen stations of installedstrong motion array in this region. After testingseveral possible rupture models, a final model has beenselected and peak ground acceleration due to thismodel is simulated at thirteen different stations.Dependency of methodology on model parameters, e.g.dip and mode of rupture propagation have also beenstudied in detail.Using this technique synthetic isoseismal maps wereprepared by converting peak ground acceleration intoMMI scale. Dependency of rupture models on syntheticisoseismals has also been studied in detail. Usingthis method, peak ground acceleration for the Laturearthquake of Sept 30, 1993 has been obtained atvarious places within meisoseismal area. Synthetic andfield intensity was compared at various well-knownsites. Since the region was not covered by anyinstrumental array during Latur earthquake, thesimulated peak ground accelerations are expected toserve basis of design criteria in this region.

Attenuation relation Envelope function Rupture plane Semi empirical method 

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Copyright information

© Kluwer Academic Publishers 2000

Authors and Affiliations

  • A. Joshi
    • 1
  1. 1.Department of Earth SciencesKurukshetra UniversityKurukshetraIndia

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