Earthquakes in Gressan
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?
Medium-low seismicity: strong quakes are rare, but not impossible.
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 = 0.093 g (10% probability of exceedance in 50 years, rigid soil).
The “area” is Gressan plus nearby towns.
The seismic history of Gressan
The earthquakes that were actually felt in Gressan over the centuries, with the intensity observed on site (Mercalli MCS scale).
- 2005IV8 September 2005
Moderate: felt by many indoors; glasses and dishes rattle.
Massif du Mont-Blanc earthquake (M4.4), epicentre 51 km away
- 1996IV31 March 1996
Moderate: felt by many indoors; glasses and dishes rattle.
Valle d'Aosta earthquake (M4.2), epicentre 31 km away
- 1887III23 February 1887
Light: felt by few people, like a passing truck.
Liguria occidentale earthquake (M6.3), epicentre 207 km away
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 37 km from Chamonix, 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?
Gressan 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 Aosta3 events · 30gAosta Valley region3 events · 30gFrequently asked questions
Were there earthquakes today in Gressan?
No, no quakes were recorded today in the Gressan area: the latest nearby dates back to 1 month ago.
Is Gressan a seismic area?
Gressan is classified in seismic zone 3 by the Civil Protection. Medium-low seismicity: strong quakes are rare, but not impossible.
What was the strongest earthquake near Gressan?
In the last ~12 years of INGV data, the strongest within 30 km of Gressan was magnitude 3.4, in 2026.
When was the last quake near Gressan?
The last quake recorded within 30 km of Gressan was 1 month ago.
Tip. Click a nearby town to explore its seismicity.
Data: INGV — National Institute of Geophysics and Volcanology (CC-BY 4.0)