A 24-hour seismograph showing the central Swiss earthquake on March 6, 2017
Observatorium Montsevelier, Val Terbi
Last year was a record one for earthquakes in Switzerland and its neighbours – with about 1,230 earthquakes detected, including the most powerful one in over a decade.
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According to the Swiss Seismological ServiceExternal link, the year 2017 was a busy one in Swiss earthquake history. On March 6, Switzerland was shaken by an earthquake with a magnitude of 4.6. Its epicentre was near Urnerboden in central Switzerland, and people felt it in many parts of the country. In addition to startling people, it caused minor damage and set off 100 aftershocks.
On July 1, an earthquake with a magnitude of 4.3 occurred near Château-d’Oex in western Switzerland, triggering about 240 aftershocks.
“In 2017, 23 earthquakes occurred with magnitudes of 2.5 or higher, in line with the average for the past 42 years. The earthquake activity was concentrated mainly in the Valais, Graubünden and the area along the Alpine front,” reports the Swiss Seismological Service. More than 700 were microearthquakes, with magnitudes under 1.0.
Located at federal technology institute ETH Zurich, the Swiss Seismological Service is the federal agency for earthquakes. Its activities are integrated in the federal action plan for earthquake precaution.
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With a magnitude of 6.5 to 7.0 on the Richter scale, the most devastating earthquake recorded in central Europe occurred in Basel in 1356. The Swiss city is still considered at risk because of its fault zone location and dense population. (Photos: akg-images, Reuters, AFP, Wikipedia)
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