Magnitude 4.7 earthquake close to Basel presumably felt throughout Switzerland

The earthquake occurred round 6:00 p.m. and three aftershocks between 1.2 and a couple of.8 adopted till 7:00 p.m. No critical harm was reported in Switzerland or France.

A brand new aftershock of the earthquake shook the Franco-Swiss area close to Basel on Sunday morning, mentioned the Swiss Seismological Service of the ETHZ (SED). Its magnitude was 3.1.

Practically 1000 adverts

The SED acquired almost 1,000 bulletins from the general public inside an hour of the primary quake.

The Earth had already shaken earlier within the Alps, with values ​​between 0.9 and a couple of.5 within the Petit Combin area, close to Orsières (VS) and Chamonix.

Of the 1000 to 1500 annual earthquakes in Switzerland, the inhabitants solely feels 10 to twenty, typically with magnitudes of two.5 or extra (23 instances per 12 months on common).

Sturdy tremor each 50 to 100 years

The chance of a catastrophic quake with a magnitude of 6 or extra is 1% for the following 12 months. We will worry such an occasion each 50 to 150 years. The final case dates again to 1946 close to Sierre (VS).

An earthquake with a magnitude of not less than 5 happens roughly each 8 to fifteen years. That is the energy of the final occasion that prompted important harm, in 1991 in Vaz (GR).

With a magnitude of round 6.6, the strongest documented earthquake in Switzerland occurred in 1356 close to Basel.

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