The April 25, 2015 Gorkha earthquake in Nepal | INSTITUT DE PHYSIQUE DU GLOBE DE PARIS

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Lithosphere tectonics and mechanics

  The April 25, 2015 Gorkha earthquake in Nepal

A status report from the current collaborations between DMG/Nepal, DASE and IPGP/France
Friday 04 September 2015
Amphithéâtre de l'IPGP 1, rue Jussieu, 75005 Paris

The ML 7.6, Gorkha earthquake of April 25, 2015, was the most deadly event in Nepal (>8700 victims) since the great MW 8.4 earthquake in 1934. Beyond the large number of victims, infrastructure destruction was maximal (total at places) in villages north of Kathmandu, creating a particularly traumatic pre-monsoon situation for the remaining population. Numerous aftershocks, still regularly felt at present (including the MW 7.3 one on May 12), added to the long lasting confusion and distress.

 

 

 

 
(Courtesy of Laurent Bollinger)

The current state of knowledge concerning the Gorkha earthquake will be presented during the September 4 Symposium at IPGP. Delegates from the Departement of Mines and Geology, institution in charge of seismic monitoring in Nepal, will be present for the Symposium. This event takes place in the framework of the collaboration established by Laboratoire de Détection et de Géophysique, (Atomic Energy Commission) more than 25 years ago. Recently, this framework was complemented by a collaboration with IPGP. Scientists involved in this collaboration with DMG, Nepal, will be participating to the Symposium.

 

Detailed program:

 

  • 09:00 - Welcome speech, by Claude Jaupart, director of IPGP
  • 09:10 - Opening speech, by Sarbjit Prasad Mahato, Director General, Department of Mines and Geology, Kathmandu, Nepal
  • 09:20 - Opening speech, by Bénédicte Guilpart, CEA/DASE Chief

 

Morning Session: Chairman: Paul Tapponnier

  • 09:30 - Introduction: Great earthquakes in the last two decades, by Yann Klinger, IPGP
  • 10:00 - Great earthquakes in Nepal and history of seismology in Nepal, by Soma Nath Sapkota, Deputy Director General of the Department of Mines and Geology, Kathmandu
  • 10:30 - The April 25, 2015 Gorkha earthquake in Nepal: The data from the Nepal National Seismological Network, by Lok Bijaya Adhikari, Chief of the National Seismological Centre, Department of Mines and Geology, Kathmandu
  • 11:00 - The April 25, 2015 earthquake in the Himalayan seismic cycle, by Laurent Bollinger, CEA/DASE
  • 11:30 - The management of the Seismic crisis in Nepal, Round Table chaired by Rajendra Prasad Khanal, Deputy Director General of the Departement of Mines and Geology, Kathmandu
  • 12:00 - 14:00 : Lunch Break

Afternoon Session: Chairman: Jocelyn Guilbert

  • 14:00 - Automatic catalog and aftershock relocalisation, by Christian Baillard, CEA/DASE-Ens/LRC, and Hélène Lyon-Caen, Ens
  • 14:30 - The Gorkha earthquake and the temporary “Bhutanepal” Far West Nepal network, by Roser Hoste-Colomer, CEA/DASE-Ens/LRC, and Hélène Lyon-Caen, Ens
  • 15:00 - Regional and teleseismic source inversion of the magnitude 7.8 Nepal earthquake, by Aurélie Guilhem, CEA/DASE
  • 15:30 - Deformation, InSAR and inversion of the source, by Raphaël Grandin and Martin Vallée, IPGP
  • 16:00 - Determination of aftershock depth by cepstral analysis of far-field seismograms, by Jean Le Tort, CEA/DASE-Ens/LRC
  • 16:30 - Wave backpropagation and seismic source, by Claudio Satriano, IPGP
  • 17:00 - Harnessing the collective power of eyewitnesses with a smartphone app: the Nepal earthquake sequence case study, by Remy Bossu, CEA/DASE
  • 17:30 - Researchers in action, presentation of the Nepal support group created after the April 25, 2015 earthquake, by Marie Lecomte-Tilouine, CNRS
  • 17:40 - What’s next? Open discussion. The 2015 Gorkha earthquake and the need for a paradigm shift? chaired by Rajendra Prasad Khanal, Deputy Director General of the Departement of Mines and Geology, Kathmandu
  • 18:30 - Closure

 

People wishing to have lunch at  IPGP are requested to register with Frederic Perrier before Thursday, September 3 at noon.

Contacts: