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International Efforts to Identify Post-quake Hazards in Nepal

May 11, 2015     Email"> PrintText Size

In response to the magnitude 7.8 earthquake that struck Nepal on 25 April 2015, the International Centre for Integrated Mountain Development (ICIMOD), National Aerospace and Space Administration (NASA), the University of Arizona, and their collaborators have coordinated an international volunteer team to map and assess hazards created by landslides, rockfalls, and avalanches.

The NASA-U.S.Geological Survey-Interagency Volunteer Earthquake Response Team, which now numbers over 40 volunteers from eight different countries, has joined with the British Geological Survey-Durham University-Earthquakes without Frontiers team. Both groups use high-resolution satellite imagery made available by government and private sector agencies such as NASA, Japan Aerospace Exploration Agency (JAXA), and Digital Globe, and international groups such as the International Charter on Space and Major Disasters to identify landslides that have affected villages and landslide-dammed rivers that could lead to severe downstream flooding if the dam is suddenly breached.

To date, the response teams have identified over 3,000 landslides, and assembled a database of over 250 identified landslides and other large mass movements, focusing specifically on those that were generated by the earthquake and its aftershocks or other secondary effects.

The BGS-Durham-EWF team has also identified a zone of widespread, intense landsliding that runs east-west, approximately parallel to the transition between the Lesser and High Himalaya. This zone contains numerous rockfalls and debris avalanches, which are individually localised but together have had catastrophic impacts on roads and villages.

The landslide database will be continually updated with new information from teams in the Chinese Academy of Sciences, and shared with local governments and agencies coordinating the delivery of aid and assistance.

Attachment:

(Editor: CHEN Na)

Contact

Nira Gurung

International Centre for Integrated Mountain Development

Phone:
E-mail: nira.gurung@icimod.org

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