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Detection and potential early warning of catastrophic flow events with regional seismic networks

Authors
/persons/resource/klcook

Cook,  K.
4.6 Geomorphology, 4.0 Geosystems, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Rekapalli,  Rajesh
External Organizations;

/persons/resource/mdietze

Dietze,  Michael       
4.6 Geomorphology, 4.0 Geosystems, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/pilz

Pilz,  M.       
2.6 Seismic Hazard and Risk Dynamics, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/cesca

Cesca,  Simone
2.1 Physics of Earthquakes and Volcanoes, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Rao,  N. Purnachandra
External Organizations;

Srinagesh,  D.
External Organizations;

Paul,  Himangshu
External Organizations;

Metz,  Malte
External Organizations;

Mandal,  Prantik
External Organizations;

Suresh,  G.
External Organizations;

/persons/resource/fcotton

Cotton,  Fabrice
2.6 Seismic Hazard and Risk Dynamics, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Tiwari,  V. M.
External Organizations;

/persons/resource/hovius

Hovius,  Niels
4.6 Geomorphology, 4.0 Geosystems, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

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Citation

Cook, K., Rekapalli, R., Dietze, M., Pilz, M., Cesca, S., Rao, N. P., Srinagesh, D., Paul, H., Metz, M., Mandal, P., Suresh, G., Cotton, F., Tiwari, V. M., Hovius, N. (2021): Detection and potential early warning of catastrophic flow events with regional seismic networks. - Science, 374, 6563, 87-92.
https://doi.org/10.1126/science.abj1227


Cite as: https://gfzpublic.gfz.de/pubman/item/item_5008113
Abstract
Early warning is a critical potential tool for mitigating the impacts of large mass wasting and flood events, a major hazard in the Himalaya. We used data from a dense seismic network in Uttarakhand, India, to detect and track a fatal rockslide to mass flow to flood cascade and examine the potential for regional networks to provide early warning for extreme flow events. Detection limits of the 7 February 2021 event depend on the nature of the active process and on the anthropogenic and environmental seismic noise levels at each station. With the existing network, a seismic monitoring system could have detected all event phases from up to 100 kilometers and provided downstream warnings within minutes of event initiation.