1997 Umbria and Marche 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 Mw5.7, and the second – the main shock – occurred at 11:40 CEST (09:40 UTC), rated Mw 6.0. Their epicentre was in Annifo.
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| UTC time | 1997-09-26 09:40:26 |
|---|---|
| ISC event | 1043512 |
| USGS-ANSS | ComCat |
| Local date | September 26, 1997 |
| Local time | 11:40 |
| Magnitude | 6.0 Mw |
| Depth | 10 km (6.2 mi) |
| Epicenter | 43.084°N 12.812°E |
| Areas affected | Italy (Umbria, Marche) |
| Casualties | 11 dead 100 injured |
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.[1] Shocks with magnitude 5.5 or higher are highlighted in light blue. The main shock with magnitude 6.0 Mw is highlighted in dark blue.
| Date (YYYY-MM-DD) | Time (UTC) | Latitude | Longitude | Depth | Magnitude |
|---|---|---|---|---|---|
| 1997-09-26 | 00:33:12 | 43.048° N | 12.879° E | 10 km (6 mi) | 5.7 (Mw ) |
| 1997-09-26 | 09:40:26 | 43.084° N | 12.812° E | 10 km (6 mi) | 6.0 (Mw ) |
| 1997-09-26 | 09:47:38 | 43.163° N | 12.752° E | 10 km (6 mi) | 4.7 (Mw ) |
| 1997-10-03 | 08:55:21 | 43.075° N | 12.794° E | 10 km (6 mi) | 5.3 (Mw ) |
| 1997-10-06 | 23:24:52 | 43.045° N | 12.835° E | 10 km (6 mi) | 5.5 (Mw ) |
| 1997-10-12 | 11:08:36 | 42.901° N | 12.897° E | 10 km (6 mi) | 5.3 (Mw ) |
| 1997-10-14 | 15:23:10 | 42.962° N | 12.892° E | 10 km (6 mi) | 5.6 (Mw ) |
| 1997-11-09 | 19:07:33 | 42.903° N | 12.948° E | 10 km (6 mi) | 5.0 (Mw ) |
| 1998-03-26 | 16:26:11 | 43.255° N | 12.969° E | 10 km (6 mi) | 5.4 (Mw ) |
| 1998-04-03 | 07:26:36 | 43.164° N | 12.701° E | 10 km (6 mi) | 5.2 (Mw ) |
| 1998-04-05 | 15:52:20 | 43.185° N | 12.719° E | 10 km (6 mi) | 5.0 (Mw ) |
Notes
- "NEIC: Earthquake Search Results". earthquakes.usgs.gov. 2009-10-01. Archived from the original on 2012-05-25. Retrieved 2009-10-01.
External links
- CFTI4med
- Video of earthquake
- The International Seismological Centre has a bibliography and/or authoritative data for this event.