Seismological observations in the eastern Alps

Details Seismological observations in the eastern Alps Seismological observations in the eastern Alps

Publishing date

Dec 1992

URL

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992pepi...75..145a&link_type=abstract

Journals

Physics of the Earth and Planetary Interiors, Volume 75, Issue 1-3, p. 145-152.

Science

Physics

Type

Scientific paper

Abstract

The Institute of Meteorology and Geophysics of the University of Vienna and the Department of Geophysics of the Central Institute of Meteorology and Geodynamics are maintaining a number of seismic stations in Austria. All stations have been established to investigate different research tasks, such as the extent of the lithosphere beneath the Alps and the seismic behaviour of the most prominent active seismic areas in Austria. One of the results was reflected in the negative travel-time residuals derived from the observation of remote earthquakes. These residuals can be explained by a steeply inclined lower boundary of the lithosphere penetrating the asthenosphere down to a depth of approximately 200 km. A simple rigid block model explains the most active seismic zones of the region and the genesis of the Vienna Basin. Seismicity and associated deformations are consistent with the regional N-S compression. Focal depths of the Mur-Mürz (MM) earthquakes must be in the upper crust (less than 8 km deep) as a result of the stress measurements and focal mechanisms. A sinistral strike-slip occurs along numerous short segments of the MM fault.

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