1997 Umbria and Marche earthquake
Introduction The '''1997 Umbria and Marche earthquake''' occurred in the regions of Umbria and Marche, central Italy on the morning of 26 September. It was preceded by a foreshock almost as strong as the main quake. The foreshock occurred at 02:33 CEST (00:33 UTC), rated , and the second – the main shock – occurred at 11:40 CEST (09:40 UTC), rated . Their epicentre was in Annifo. The mainshock was assigned X (''Extreme'') and foreshock VIII (''Severe'') on the Mercalli intensity scale.There were several thousands of foreshocks and aftershocks from May 1997 to April 1998, more than thirty of which had a 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. Date (YYYY-MM-DD)  Time (UTC)  Latitude  Longitude  Depth  Magnitude 1997-09-26  00:33:12  43.048° N  12.879° E    5.7 () 1997-09-26  09:40:26  43.084° N  12.812° E    6.0 () 1997-09-26  09:47:38  43.163° N  12.752° E    4.7 () 1997-10-03  08:55:21  43.075° N  12.794° E    5.3 () 1997-10-06  23:24:52  43.045° N  12.835° E    5.5 () 1997-10-12  11:08:36  42.901° N  12.897° E    5.3 () 1997-10-14  15:23:10  42.962° N  12.892° E    5.6 () 1997-11-09  19:07:33  42.903° N  12.948° E    5.0 () 1998-03-26  16:26:11  43.255° N  12.969° E    5.4 () 1998-04-03  07:26:36  43.164° N  12.701° E    5.2 () 1998-04-05  15:52:20  43.185° N  12.719° E    5.0 ()
See also * List of earthquakes in 1997* List of earthquakes in Italy* Earthquake engineering
Notes
Further reading ******
External links *  CFTI4med *  Earthquake Assisi, Italy – Terremoto Assisi, Italia 1997 – The only existing video footage of the quake, showing the moment it destroyed the Basilica of Saint Francis of Assisi. *