Earthquakes in Gremiasco
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 = 0.097 g (10% probability of exceedance in 50 years, rigid soil).
The “area” is Gremiasco plus nearby towns.
The seismic history of Gremiasco
The earthquakes that were actually felt in Gremiasco over the centuries, with the intensity observed on site (Mercalli MCS scale).
- 2005NF18 April 2005
Imperceptible: only instruments record it.
Valle del Trebbia earthquake (M4.0), epicentre 20 km away
- 2005NF13 April 2005
Imperceptible: only instruments record it.
Valle del Trebbia earthquake (M3.7), epicentre 21 km away
- 1945VII29 June 1945
Very strong: hard to stand; chimneys and roof tiles fall, serious damage to weaker buildings.
Oltrepò Pavese earthquake (M5.1), epicentre 3 km away · observed at Colombassi
- 1945VII29 June 1945
Very strong: hard to stand; chimneys and roof tiles fall, serious damage to weaker buildings.
Oltrepò Pavese earthquake (M5.1), epicentre 3 km away
- 1945VI-VII14 June 1945
Very strong: hard to stand; chimneys and roof tiles fall, serious damage to weaker buildings.
Oltrepò Pavese earthquake (M4.8), epicentre 3 km away
- 1887V23 February 1887
Rather strong: felt by almost everyone; hanging objects swing.
Liguria occidentale earthquake (M6.3), epicentre 135 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 8 km from Rivanazzano-Stradella, 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
28 eventsEarthquakes in the area
Nearby towns
How does it compare with the surroundings?
Gremiasco 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 Alessandria0 events · 30gPiedmont region34 events · 30gFrequently asked questions
Were there earthquakes today in Gremiasco?
No, no quakes were recorded today in the Gremiasco area: the latest nearby dates back to 14 months ago.
Is Gremiasco a seismic area?
Gremiasco 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 Gremiasco?
In the last ~12 years of INGV data, the strongest within 30 km of Gremiasco was magnitude 4.0, in 2020.
When was the last quake near Gremiasco?
The last quake recorded within 30 km of Gremiasco 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)