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Solid Earth An interactive open-access journal of the European Geosciences Union
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Volume 1, issue 1
Solid Earth, 1, 93-98, 2010
https://doi.org/10.5194/se-1-93-2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.
Solid Earth, 1, 93-98, 2010
https://doi.org/10.5194/se-1-93-2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.

  06 Oct 2010

06 Oct 2010

Some possible correlations between electro-magnetic emission and seismic activity during West Bohemia 2008 earthquake swarm

P. Kolář P. Kolář
  • Institute of Geophysics, Boční II 1341, Prague 4, Spořilov, 14131, Czech Republic

Abstract. A potential link between electromagnetic emission (EME) and seismic activity (SA) has been the subject of scientific speculations for a long time. EME versus SA relations obtained during the 2008 earthquake swarm which occurred in West Bohemia are presented. First, a brief characterisation of the seismic region and then the EME recording method and data analysis will be described. No simple direct link between EME and SA intensity was observed, nevertheless a deeper statistical analysis indicates: (i) slight increase of EME activity in the time interval 60 to 30 min before a seismic event with prevalent periods about 10 min, (ii) some gap in EME activity approximately 2 h after the event, and (iii) again a flat maximum about 4 h after the seismic events. These results qualitatively correspond with the observations from other seismically active regions (Fraser-Smith et al., 1990). The global decrease of EME activity correlating with the swarm activity decay was also observed. Due to the incomplete EME data and short observation time, these results are limited in reliability and are indicative only.

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