1. CSIR-North East Institute of Science & Technology Jorhat-785006, Assam, India
2. Dept. of Physics, University of Malta, Malta
3. National Center for Seismology, Ministry of Earth Sciences, New-Delhi, Govt. of India
4. India Meteorological Department (IMD), New Delhi, India
5. CSIR-North East Institute of Science & Technology, Jorhat-6, Assam, India
6. National Research Institute of Astronomy and Geophysics, Cairo, Egypt