Earthquakes in Bionaz
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 = 0.128 g (10% probability of exceedance in 50 years, rigid soil).
The “area” is Bionaz plus nearby towns.
The seismic history of Bionaz
The earthquakes that were actually felt in Bionaz 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 50 km away
- 1996IV-V31 March 1996
Rather strong: felt by almost everyone; hanging objects swing.
Valle d'Aosta earthquake (M4.2), epicentre 4 km away
- 1887NF23 February 1887
Imperceptible: only instruments record it.
Liguria occidentale earthquake (M6.3), epicentre 229 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 30 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?
Bionaz sits in one of the most seismically active areas of its province: quakes are a familiar presence here, almost always light.
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 Bionaz?
No, no quakes were recorded today in the Bionaz area: the latest nearby dates back to 1 month ago.
Is Bionaz a seismic area?
Bionaz 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 Bionaz?
In the last ~12 years of INGV data, the strongest within 30 km of Bionaz was magnitude 3.9, in 2021.
When was the last quake near Bionaz?
The last quake recorded within 30 km of Bionaz 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)