An earthquake of Magnitude (Mw) 6.9 (USGS) occured on 18th September 2011 on the Nepal-Sikkim Border and was followed by three smaller events, within the same day, of Magnitude 5.0, 4.5 and 4.2 (IMD) in Sikkim. These earthquakes killed several people in Sikkim and adjoining north Bengal and caused a great deal of damage to property.
All these earthquakes have been recorded by the seismograph at the IISER Kolkata Seismological Observatory (Mohanpur) and by the temporary network of stations in Sikkim Himalaya operated by the Seismology group of IISER Kolkata.
Earth Scientists from IISER Kolkata are closely studying these earthquakes and have provided general scientific information related to the quakes. A few of these are listed below:
Links to News Report of the Earthquake (Information from IISER-K Seismological Observatory)
Report in Telegraph
Report in Darjeeling Times
Report in Kalimpong News
Report in Outlook India
CNN IBN Interview with Dr. Supriyo Mitra
A map showing the location of these events (as initially reported by various agencies) are plotted below.
The vertical component velocity record (m/s) of the Mw 6.9 earthquake from the IISER-Kolkata Observatory is plotted below.
Compiled by Supriyo Mitra.