Magnitude 6.1 Mw Areas affected Italy (Umbria, Marche) Date 26 September 1997 | Depth 10 km (6.2 mi) Casualties 11 dead
100 injured | |
 | ||
Similar 1980 Irpinia earthquake, 2002 Molise earthquake, 2009 L'Aquila earthquake, August 2016 Central It, 1976 Friuli earthquake | ||
The 1997 Umbria and Marche earthquake occurred in the regions of Umbria and Marche, central Italy on the morning of September 26. It was preceded by a foreshock almost as strong as the main quake. The foreshock occurred at 02:33 CEST (00:33 UTC), rated 5.7 on the Richter scale, and the second – the main shock – occurred at 11:40 CEST (09:40 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. Eleven people are known to have died following the shocks.
List of foreshocks and aftershocks
Only shocks (both foreshocks and aftershocks) with magnitude 5.0 or higher are listed. Shocks with magnitude 5.5 or higher are highlighted in light blue. The main shock with magnitude 6.1 Mw is highlighted in dark blue.