• Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      https://www.ias.ac.in/article/fulltext/jess/111/01/0001-0015

    • Keywords

       

      Killari earthquake aftershocks; simultaneous inversion; stable continental region

    • Abstract

       

      The aftershock sequence of the September 30th, 1993 Killari earthquake in the Latur district of Maharashtra state, India, recorded by 41 temporary seismograph stations are used for estimating 3-D velocity structure in the epicentral area. The local earthquake tomography (LET) method of Thurber (1983) is used. About 1500P and 1200S wave travel-times are inverted. TheP andS wave velocities as well asVP/VSratio vary more rapidly in the vertical as well as in the horizontal directions in the source region compared to the adjacent areas. The main shock hypocentre is located at the junction of a high velocity and a low velocity zone, representing a fault zone at 6–7 km depth. The estimated average errors ofP velocity andVP/VSratio are ±0.07 km/s and ±0.016, respectively. The best resolution ofP and S-wave velocities is obtained in the aftershock zone. The 3-D velocity structure and precise locations of the aftershocks suggest a ‘stationary concept’ of the Killari earthquake sequence.

    • Author Affiliations

       

      S Mukhopadhyay1 J R Kayal2 K N Khattri3 B K Pradhan1

      1. Department of Earth Sciences, Indian Institute of Technology (formerly University of Roorkee), Roorkee, Uttaranchal - 247 667, India
      2. Central Geophysics Division, Geological Survey of India, 27 J.L.N. Road, Kolkata - 700 016, India
      3. 100 Rajendra Nagar, Dehra Dun, Uttaranchal - 248 001, India
    • Dates

       
  • Journal of Earth System Science | News

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2017-2019 Indian Academy of Sciences, Bengaluru.