1997 Umbria and Marche earthquake

1997 Umbria and Marche earthquake
Date 11:40:26, September 26, 1997 (UTC) (1997-09-26T11:40:26Z)
Magnitude 6.1 Mw
Depth 10 km (6.2 mi)
Epicenter 43°05′02″N 12°48′43″E / 43.084°N 12.812°E / 43.084; 12.812Coordinates: 43°05′02″N 12°48′43″E / 43.084°N 12.812°E / 43.084; 12.812
Areas affected Italy (Umbria, Marche)
Casualties 11 dead
100 injured

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 2:33 am CEST (0:33 UTC), rated 5.7 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. 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 6.1 Mw is highlighted in dark blue.

Date
(YYYY-MM-DD) 		Time
(UTC) 		Latitude Longitude Depth Magnitude
1997-09-26 0:33:12 43.048° N 12.879° E 10 km (6 mi) 5.7 (Mw)
1997-09-26 11:40:26 43.084° N 12.812° E 10 km (6 mi) 6.1 (Mw)
1997-09-26 9:47:38 43.163° N 12.752° E 10 km (6 mi) 4.7 (ML)
1997-10-03 8:55:21 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 (ML)
1997-10-14 15:23:10 42.962° N 12.892° E 10 km (6 mi) 5.6 (ML)
1997-11-09 19:07:33 42.903° N 12.948° E 10 km (6 mi) 5.0 (ML)
1998-03-26 16:26:11 43.255° N 12.969° E 10 km (6 mi) 5.4 (Mw)
1998-04-03 7:26:36 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 (ML)

See also

Notes

  1. ↑ "NEIC: Earthquake Search Results". earthquakes.usgs.gov. 2009-10-01. Retrieved 2009-10-01.

External links

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