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Full-Waveform based methods for Microseismic Monitoring Operations: an Application to Natural and Induced Seismicity in the Hengill Geothermal Area, Iceland

Authors

Rossi,  Camilla
External Organizations;

Grigoli,  Francesco
External Organizations;

/persons/resource/cesca

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

/persons/resource/heimann

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

Gasperini,  Paolo
External Organizations;

Hjörleifsdóttir,  Vala
External Organizations;

/persons/resource/dahm

Dahm,  T.
2.1 Physics of Earthquakes and Volcanoes, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Bean,  Christopher J.
External Organizations;

Wiemer,  Stefan
External Organizations;

Scarabello,  Luca
External Organizations;

Nooshiri,  Nima
External Organizations;

Clinton,  John F.
External Organizations;

Obermann,  Anne
External Organizations;

Ágústsson,  Kristján
External Organizations;

Ágústsdóttir,  Thorbjörg
External Organizations;

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Fulltext (public)

5004032.pdf
(Publisher version), 5MB

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Citation

Rossi, C., Grigoli, F., Cesca, S., Heimann, S., Gasperini, P., Hjörleifsdóttir, V., Dahm, T., Bean, C. J., Wiemer, S., Scarabello, L., Nooshiri, N., Clinton, J. F., Obermann, A., Ágústsson, K., Ágústsdóttir, T. (2020): Full-Waveform based methods for Microseismic Monitoring Operations: an Application to Natural and Induced Seismicity in the Hengill Geothermal Area, Iceland. - Advances in Geosciences, 54, 129-136.
https://doi.org/10.5194/adgeo-54-129-2020


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5004032
Abstract
Geothermal systems in the Hengill volcanic area, SW Iceland, started to be exploited for electrical power and heat production since the late 1960s. Today the two largest operating geothermal power plants are located at Nesjavellir and Hellisheiði. This area is a complex tectonic and geothermal site, located at the triple junction between the Reykjanes Peninsula (RP), the Western Volcanic Zone (WVZ), and the South Iceland Seismic Zone (SISZ). The region is seismically highly active with several thousand earthquakes located yearly. The origin of such earthquakes may be either natural or anthropogenic. The analysis of microseismicity can provide useful information on natural active processes in tectonic, geothermal and volcanic environments as well as on physical mechanisms governing induced events. Here, we investigate the microseismicity occurring in Hengill area, using a very dense broadband seismic monitoring network deployed in Hellisheiði since November 2018, and apply sophisticated full-waveform based method for detection and location. Improved locations and first characterization indicate that it is possible to identify different types of microseismic clusters, which are associated with either production/injection or the tectonic setting of the geothermal area.