Earthquakes in Switzerland and surrounding regions during 2014

Abstract

this report of the swiss seismological service summarizes the seismic activity in switzerland and surrounding regions during 2008. During this period, 451 earthquakes and 75 quarry blasts were detected and located in the region under consideration. the three strongest events occurred in the Valais, near Lac des toules (M L 3.6), and in Graubünden, near Ilanz (M L 3.7) and Paspels (M L 4.0). Although felt by the population, they were not reported to have caused any damage. However, with a total of only 15 events with M L ≥ 2.5, the seismic activity in the year 2008 was far below the average over the previous 33 years. ZusAmmenfAssunGDieser bericht des schweizerischen erdbebendienstes stellt eine Zusammenfassung der im Vorjahr in der schweiz und umgebung aufgetretenen erd- IntroductionPast earthquake activity in and around switzerland has been documented in an uninterrupted series of annual reports from 1879 until 1963 (Jahresberichte des Schweizerischen Erdbebendienstes). three additional annual reports have been published for the years 1972-1974. these reports together with historical records of earthquakes dating back to the 13th century have been summarized by Pavoni (1977) and provided the basis for the first seismic hazard map of switzerland (sä-gesser & mayer-rosa 1978). With the advent of routine data processing by computer, the wealth of data acquired by the nationwide seismograph network has been regularly documented in bulletins with detailed lists of all recorded events (Monthly Bulletin of the Swiss Seismological Service). since 1996, annual reports summarizing the seismic activity in switzerland and surrounding regions have been published in the present form , 1999, 2001, 2003, 2005Deichmann et al. 1998 Deichmann et al. , 2000aDeichmann et al. , 2002Deichmann et al. , 2004 Deichmann et al. , 2006 Deichmann et al. , 2008. In the course of reassessing the seismic hazard in switzerland, a new uniform earthquake catalog covering both the historical and instrumental periods has been compiled (fäh et al. 2003). the data in the new earthquake catalog of switzerland (ecOs) are available on line (http://www.seismo.ethz.ch, swiss earthquake catalogs). the new seismic hazard map of switzerland based on this catalog was officially released in 2004(Giardini et al. 2004Wiemer et al. 2009). In addition, numerous studies covering different aspects of the recent seismicity of switzerland have been published in the scientific literature (for an overview and additional references see, e.g. Deichmann 1990;Pavoni & roth 1990;rüttener 1995;rüttener at al. 1996;Pavoni et al. 1997;Deichmann et al. 2000b; Kastrup et al. 2004;Kastrup et al. 2007). Data acquisition and analysis Seismic stations in operation during 2008the swiss seismological service operates two separate nationwide seismic networks, a high-gain broad-band seismometer earthquakes in switzerland and surrounding regions during 2008

Tectonics of the central Swiss Molasse Basin: Post‐Miocene transition to incipient thick‐skinned tectonics?

“…Focal mechanisms have been compiled from Kastrup et al [], Deichmann [], and Diehl et al . [, ]. AFZ, Aaretal Fault Zone; BWFZ, Burgdorf‐Wynigen Fault Zone; M , magnitude; and S Hmin , minimum horizontal stress.…”

“…All other surface structures have been compiled from the Tectonic Map of Switzerland 1:500 0 000 [Spicher, 1980], the Geological Atlas of Switzerland 1:25 0 000 and from this study. Focal mechanisms have been compiled from Kastrup et al [2004], Deichmann [2014], and Diehl et al [ , 2015. AFZ, Aaretal Fault Zone; BWFZ, Burgdorf-Wynigen Fault Zone; M, magnitude; and S Hmin , minimum horizontal stress.…”

“…Details on the estimation of hypocenter location uncertainty are given in the annual reports of the Swiss Seismological Service [e.g., Deichmann et al, 2000;. Focal mechanisms of the study area ( Table S3 in the supporting information) reveal a present-day strike-slip-dominated stress regime with possible subvertical fault planes striking N-S, NNE-SSW and W-E, and WNW-ESE, respectively ( Figure 9) [from Kastrup et al, 2004;Deichmann, 2014;Diehl et al, , 2015. The inferred regional maximum compressive stress is striking NNW-SSE, which is in agreement with published present-day maximum horizontal stress orientations for the Molasse Basin Heidbach and Reinecker, 2013].…”

Multi-scale imaging of a slow active fault zone: contribution for improved seismic hazard assessment in the Swiss Alpine foreland

“…Wiemer et al 2009;Singer et al 2014;Diehl et al 2015). However, digital seismic data collected by the Swiss National Network since the late 1970's show a concentration of earthquakes that delineate a 20-30 km long N-S striking seismic lineament east of the city of Fribourg called the Fribourg Lineament (FL) (Fig.…”

State-of-the art and future of earthquake early warning in the European region

“…It is worth noting that during the last phase of REAKT, a new extension of the SOSEWIN unit was developed to 21 accommodate multi-parameter recording and therefore making it suitable also for landslide early warning and the seismic network (Diehl et al, 2015), and all instrumentation is in the process of being modernised to ensure …”