Earthquakes in Castano Primo
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 = 0.038 g (10% probability of exceedance in 50 years, rigid soil).
Why the ground rarely shakes here
Castano Primo 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 Castano Primo plus nearby towns.
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 43 km from Western S-Alps external thrust shallow-west, 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
2 eventsEarthquakes in the area
Nearby towns
How does it compare with the surroundings?
Castano Primo 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 Milano0 events · 30gLombardy region11 events · 30gFrequently asked questions
Were there earthquakes today in Castano Primo?
No, no quakes were recorded today in the Castano Primo area: the latest nearby dates back to 125 months ago.
Is Castano Primo a seismic area?
Castano Primo 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 Castano Primo?
In the last ~12 years of INGV data, the strongest within 30 km of Castano Primo was magnitude 2.6, in 2019.
When was the last quake near Castano Primo?
The last quake recorded within 30 km of Castano Primo was 3 months ago.
Tip. Click a nearby town to explore its seismicity.
Data: INGV — National Institute of Geophysics and Volcanology (CC-BY 4.0)