The 1997 Umbria and Marche earthquake consisted of two earthquakes that occurred in the regions of Umbria and Marche, central Italy, in quick succession on the morning of September 26 1997.
The first shock occurred at 2:33 am CEST (0:33 UTC), rated 5.5 on the Richter scale,
and the second – the main shock – occurred at 11:40 am CEST (9:40 UTC),
rated 6.1 on the Richter scale. Their epicentre was in Annifo.
There were several thousands of foreshocks and aftershocks from May 1997 to April 1998,
more than thirty of which had a Richter magnitude more than 3.5. 11
people are known to have died following the shocks of September 26 1997.
in Wikipédia
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