Full-Waveform based methods for Microseismic Monitoring Operations: An Application to Natural and Induced Seismicity in the Hengill Geothermal Area, Iceland
Por:
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.
Publicada:
1 ene 2020
Resumen:
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. © 2020 Author(s).
Filiaciones:
Rossi C.:
Department of Physics and Astronomy (DIFA), University of Bologna, Bologna, 40127, Italy
Grigoli F.:
Department of Earth Sciences, Eth Zurich, Zurich, Switzerland
Cesca S.:
German Research Center for Geosciences (GFZ), Section Physics of Earthquakes and Volcanoes, Potsdam, Germany
Heimann S.:
German Research Center for Geosciences (GFZ), Section Physics of Earthquakes and Volcanoes, Potsdam, Germany
Gasperini P.:
Department of Physics and Astronomy (DIFA), University of Bologna, Bologna, 40127, Italy
Hjörleifsdóttir V.:
Reykjavìk Energy (OR), Reykjavìk, Iceland
Dahm T.:
German Research Center for Geosciences (GFZ), Section Physics of Earthquakes and Volcanoes, Potsdam, Germany
Bean C.J.:
Dublin Institute for Advanced Studies (DIAS), Dublin, Ireland
Wiemer S.:
Department of Earth Sciences, Eth Zurich, Zurich, Switzerland
Scarabello L.:
Department of Earth Sciences, Eth Zurich, Zurich, Switzerland
Nooshiri N.:
Dublin Institute for Advanced Studies (DIAS), Dublin, Ireland
Clinton J.F.:
Department of Earth Sciences, Eth Zurich, Zurich, Switzerland
Obermann A.:
Department of Earth Sciences, Eth Zurich, Zurich, Switzerland
Ágústsson K.:
Iceland GeoSurvey (ÍSOR), Reykjavìk, Iceland
Ágústsdóttir T.:
Iceland GeoSurvey (ÍSOR), Reykjavìk, Iceland
Gold
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