Earthquakes in Gradoli
Seismic activity in the surroundings
30 km radiusINGV catalogue epicentres of the last ~12 years, within the given radius from the town centre.
How seismic is this area?
A zone where strong earthquakes are possible: new buildings follow strict anti-seismic criteria.
Official Civil Protection classification (upd. 2025), used for building codes.
Hazard describes the long-term expected shaking: it is not a forecast. Technical value: ag = 0.141 g (10% probability of exceedance in 50 years, rigid soil).
The “area” is Gradoli plus nearby towns.
The seismic history of Gradoli
The earthquakes that were actually felt in Gradoli over the centuries, with the intensity observed on site (Mercalli MCS scale).
- 2000IV1 April 2000
Moderate: felt by many indoors; glasses and dishes rattle.
Monte Amiata earthquake (M4.5), epicentre 27 km away
- 1997IV-V26 September 1997
Rather strong: felt by almost everyone; hanging objects swing.
Appennino umbro-marchigiano earthquake (M5.7), epicentre 95 km away
- 1997IV26 September 1997
Moderate: felt by many indoors; glasses and dishes rattle.
Appennino umbro-marchigiano earthquake (M6.0), epicentre 92 km away
- 1994IV9 February 1994
Moderate: felt by many indoors; glasses and dishes rattle.
Val di Paglia earthquake (M3.5), epicentre 21 km away
- 1973IV-V30 December 1973
Rather strong: felt by almost everyone; hanging objects swing.
Grossetano earthquake (M4.1), epicentre 16 km away
- 1971IV6 February 1971
Moderate: felt by many indoors; glasses and dishes rattle.
Tuscania earthquake (M4.8), epicentre 20 km away
- 1957IV-V6 December 1957
Rather strong: felt by almost everyone; hanging objects swing.
Orvietano earthquake (M5.0), epicentre 17 km away
- 1940V16 October 1940
Rather strong: felt by almost everyone; hanging objects swing.
Val di Paglia earthquake (M5.3), epicentre 29 km away
- 1929IV-V12 December 1929
Rather strong: felt by almost everyone; hanging objects swing.
Monti Volsini earthquake (M4.2), epicentre 7 km away
- 1919V10 September 1919
Rather strong: felt by almost everyone; hanging objects swing.
Val di Paglia earthquake (M5.4), epicentre 20 km away
- 1695VI-VII11 June 1695
Very strong: hard to stand; chimneys and roof tiles fall, serious damage to weaker buildings.
Lazio settentrionale earthquake (M5.8), epicentre 21 km away
- 1695D11 June 1695
Strong: felt by everyone, many get scared; objects fall, first light damage to buildings.
Lazio settentrionale earthquake (M5.8), epicentre 21 km away · observed at San Magno
…and 16 more documented effects in this town's history.
Source: Italian Macroseismic Database DBMI15 (INGV, CC BY 4.0).
The great earthquakes in this area's history
Almost a thousand years of catalogues: the strongest documented events within ~50 km.
Source: Parametric Catalogue of Italian Earthquakes CPTI15 (INGV, CC BY 4.0).
The closest seismic structure
The town lies about 68 km from Mugello-Citta' di Castello-Leonessa, one of the seismic structures mapped by INGV geologists.
Faults are mapped to build better and understand the territory: knowing them says nothing about when an earthquake will occur, which remains unpredictable. Source: DISS 3.3 (INGV, CC BY 4.0).
Area over time
Earthquake map
60 eventsEarthquakes in the area
Nearby towns
How does it compare with the surroundings?
Gradoli is among the quietest towns of its province: very few epicentres are recorded here.
Each quake is attributed to the town closest to its epicentre: the numbers describe the area, not the municipal territory alone.
Context
Province of Viterbo1 events · 30gLazio region80 events · 30gFrequently asked questions
Were there earthquakes today in Gradoli?
No, no quakes were recorded today in the Gradoli area: the latest nearby dates back to 16 days ago.
Is Gradoli a seismic area?
Gradoli is classified in seismic zone 2 by the Civil Protection. A zone where strong earthquakes are possible: new buildings follow strict anti-seismic criteria.
What was the strongest earthquake near Gradoli?
In the last ~12 years of INGV data, the strongest within 30 km of Gradoli was magnitude 4.1, in 2016.
When was the last quake near Gradoli?
The last quake recorded within 30 km of Gradoli was 16 days ago.
Tip. Click a nearby town to explore its seismicity.
Data: INGV — National Institute of Geophysics and Volcanology (CC-BY 4.0)