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Small-aperture seismic array monitors Vogtland earthquake swarm in 2008/09

  • The most recent intense earthquake swarm in the Vogtland lasted from 6 October 2008 until January 2009. Greatest magnitudes exceeded M3.5 several times in October making it the greatest swarm since 1985/86. In contrast to the swarms in 1985 and 2000, seismic moment release was concentrated near swarm onset. Focal area and temporal evolution are similar to the swarm in 2000. Work hypothysis: uprising upper-mantle fluids trigger swarm earthquakes at low stress level. To monitor the seismicity, the University of Potsdam operated a small aperture seismic array at 10 km epicentral distance between 18 October 2008 and 18 March 2009. Consisting of 12 seismic stations and 3 additional microphones, the array is capable of detecting earthquakes from larger to very low magnitudes (M<-1) as well as associated air waves. We use array techniques to determine properties of the incoming wavefield: noise, direct P and S waves, and converted phases.

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Metadaten
Author:Dirk Rößler, Stephan Hiemer, Christoph Bach, Elise Delavaud, Frank Krüger, Matthias OhrnbergerGND, David Sauer, Frank Scherbaum, Daniel Vollmer
URN:urn:nbn:de:kobv:517-opus-29185
Document Type:Other
Language:English
Year of Completion:2009
Publishing Institution:Universität Potsdam
Release Date:2009/03/20
Tag:Arrayseismologie; Erdbebenschwarm 2008; Vogtland
Vogtland; West Bohemia; array seismology; earthquake swarm
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Geowissenschaften
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 55 Geowissenschaften, Geologie / 550 Geowissenschaften
Licence (German):License LogoCreative Commons - Namensnennung, Nicht kommerziell, Weitergabe zu gleichen Bedingungen 3.0 Deutschland