Earthquakes in Ayas
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 = 0.079 g (10% probability of exceedance in 50 years, rigid soil).
The “area” is Ayas plus nearby towns.
The seismic history of Ayas
The earthquakes that were actually felt in Ayas over the centuries, with the intensity observed on site (Mercalli MCS scale).
- 2005II8 September 2005
Very light: felt only by a few people at rest, on upper floors.
Massif du Mont-Blanc earthquake (M4.4), epicentre 70 km away · observed at Ayas (Antagnod)
- 1960IV23 March 1960
Moderate: felt by many indoors; glasses and dishes rattle.
Vallese earthquake (M5.0), epicentre 62 km away · observed at Ayas (Antagnod)
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 46 km from Western Valais, 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?
Ayas records more quakes than the average of its province.
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 Ayas?
No, no quakes were recorded today in the Ayas area: the latest nearby dates back to 2 months ago.
Is Ayas a seismic area?
Ayas 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 Ayas?
In the last ~12 years of INGV data, the strongest within 30 km of Ayas was magnitude 3.9, in 2021.
When was the last quake near Ayas?
The last quake recorded within 30 km of Ayas 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)