Institution: | CSIR Centre for Mathematical Modelling and Computer Simulation (C-MMACS), NAL Belur Campus, Bangalore, 560 037,;India. E-mail: Department of Earth Sciences, University of Trieste, Via E. Weiss 4, 34127;Trieste, Italy. E-mail: The Abdus Salam International Centre for Theoretical Physics, SAND group, Trieste, Italy;INGV, Istituto Nazionale di Geofisica e Vulcanologia, Napoli, Italy. E-mail: |