Earthquakes in Switzerland and surrounding regions during 2009

Deichmann, Nicholas ; Clinton, John ; Husen, Stephan ; Edwards, Benjamin ; Haslinger, Florian ; Fäh, Donat ; Giardini, Domenico ; Kästli, Philipp ; Kradolfer, Urs ; Marschall, Iris ; Wiemer, Stefan

In: Swiss Journal of Geosciences, 2010, vol. 103, no. 3, p. 535-549

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    Summary
    This report of the Swiss Seismological Service summarizes the seismic activity in Switzerland and surrounding regions during 2009. During this period, 450 earthquakes and 68 quarry blasts were detected and located in the region under consideration. The three strongest events occurred about 15km NW of Basel in southern Germany (ML 4.2), near Wildhaus in the Toggenburg (ML 4.0) and near Bivio in Graubünden (ML 3.5). Although felt by the population, they were not reported to have caused any damage. With a total of 24 events with ML≥2.5, the seismic activity in the year 2009 was close to the average over the previous 34years