Earthquakes in San Martino Alfieri
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?
The quietest class: the probability of strong earthquakes is very low.
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 = 0.043 g (10% probability of exceedance in 50 years, rigid soil).
Why the ground rarely shakes here
San Martino Alfieri sits in one of the most stable areas of Italy: far from the boundary between the Eurasian and African plates, on ancient, rigid crust that hardly accumulates tectonic stress any more.
That is why earthquakes here are rare and almost always weak: a small geological privilege.
The “area” is San Martino Alfieri plus nearby towns.
The seismic history of San Martino Alfieri
The earthquakes that were actually felt in San Martino Alfieri over the centuries, with the intensity observed on site (Mercalli MCS scale).
- 2001III18 July 2001
Light: felt by few people, like a passing truck.
Monferrato earthquake (M4.2), epicentre 25 km away
- 2000V21 August 2000
Rather strong: felt by almost everyone; hanging objects swing.
Monferrato earthquake (M4.9), epicentre 23 km away
- 1993NF17 July 1993
Imperceptible: only instruments record it.
Liguria occidentale earthquake (M4.3), epicentre 71 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 25 km from Southern Piemonte, 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
13 eventsEarthquakes in the area
Nearby towns
How does it compare with the surroundings?
San Martino Alfieri 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 Asti0 events · 30gPiedmont region34 events · 30gFrequently asked questions
Were there earthquakes today in San Martino Alfieri?
No, no quakes were recorded today in the San Martino Alfieri area: the latest nearby dates back to 17 months ago.
Is San Martino Alfieri a seismic area?
San Martino Alfieri is classified in seismic zone 4 by the Civil Protection. The quietest class: the probability of strong earthquakes is very low.
What was the strongest earthquake near San Martino Alfieri?
In the last ~12 years of INGV data, the strongest within 30 km of San Martino Alfieri was magnitude 3.0, in 2020.
When was the last quake near San Martino Alfieri?
The last quake recorded within 30 km of San Martino Alfieri was 4 months ago.
Tip. Click a nearby town to explore its seismicity.
Data: INGV — National Institute of Geophysics and Volcanology (CC-BY 4.0)