Abstract
A seismotectonic map of Switzerland was recently completed. The map is a first attempt to present and combine the seismicity and neotectonics of Switzerland. Maximum compression in the upper crust inferred from fault-plane solutions of 23 earthquakes and micro-earthquake studies is oriented NNW—SSE in eastern Switzerland and NW—SE to WNW—ESE in western Switzerland, which corresponds well with the orientation of Neogene and Quaternary maximum horizontal shortening. Evidently the stress field which causes the present seismicity is very similar in its orientation to the stress field of the last 5 to 10 million years which produced the neotectonic deformation. Recent vertical movements and uplift rates in Switzerland are in close relation to the present and neotectonic stress field of the upper crust.
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