events

The 6.9 Mw  Irpinia earthquake shakes southern Italy with a maximum Mercalli intensity of X (Extreme), killing 2,483–4,900, and injuring 7,700–8,934.

Historical image related to The 6.9 Mw  Irpinia earthquake shakes southern Italy with a maximum Mercalli intensity of X (Extreme), killing 2,483–4,900, and injuring 7,700–8,934. from November 23, 1980

1980 Irpinia earthquake

1980 earthquake in southern Italy

The 1980 Irpinia earthquake took place in Italy on 23 November 1980, with a moment magnitude of 6.9 and a maximum Mercalli intensity of X (Extreme). It left at least 2,483 people dead, at least 7,700 injured, and 250,000 homeless.
Source: Wikipedia (CC BY-SA)

Modified Mercalli intensity scale

Seismic intensity scale used to quantify the degree of shaking during earthquakes

The Modified Mercalli intensity scale measures the effects of an earthquake at a given location. This is in contrast with the seismic magnitude usually reported for an earthquake.
Source: Wikipedia (CC BY-SA)