Earthquakes in Calasca-Castiglione
Seismic activity in the surroundings
30 km radiusINGV catalogue epicentres of the last ~11 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 = 0.066 g (10% probability of exceedance in 50 years, rigid soil).
The “area” is Calasca-Castiglione plus nearby towns.
The seismic history of Calasca-Castiglione
The earthquakes that were actually felt in Calasca-Castiglione over the centuries, with the intensity observed on site (Mercalli MCS scale).
- 1993V14 June 1993
Rather strong: felt by almost everyone; hanging objects swing.
Val d'Ossola earthquake (M4.3), epicentre 8 km away · observed at Calasca-Castiglione (Antrogna)
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 35 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
50 eventsEarthquakes in the area
Nearby towns
How does it compare with the surroundings?
Calasca-Castiglione 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 Verbano-Cusio-Ossola1 events · 30gPiedmont region34 events · 30gFrequently asked questions
Were there earthquakes today in Calasca-Castiglione?
No, no quakes were recorded today in the Calasca-Castiglione area: the latest nearby dates back to 8 months ago.
Is Calasca-Castiglione a seismic area?
Calasca-Castiglione 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 Calasca-Castiglione?
In the last ~11 years of INGV data, the strongest within 30 km of Calasca-Castiglione was magnitude 2.4, in 2024.
When was the last quake near Calasca-Castiglione?
The last quake recorded within 30 km of Calasca-Castiglione was 2 months ago.
Tip. Click a nearby town to explore its seismicity.
Data: INGV — National Institute of Geophysics and Volcanology (CC-BY 4.0)