Earthquakes today in Castelletto d'Orba
Today, within 30 km: no earthquakes recorded (updated at 14:23). Latest: M1.0 on 14 August 2026 at 07:12, 4 km South-West of Ceranesi, 12 km deep.
Latest earthquake within 30 km
Seismic activity within 30 km
30 km radiusINGV catalogue epicentres of the last ~12 years, within the given radius from the town centre.
How seismic is Castelletto d'Orba: zone 3
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 = 0.082 g (10% probability of exceedance in 50 years, rigid soil).
“Within 30 km”: epicentres less than 30 km from the centre of Castelletto d'Orba. “In the town”: quakes whose nearest town to the epicentre is Castelletto d'Orba.
The seismic history of Castelletto d'Orba
The earthquakes that were actually felt in Castelletto d'Orba over the centuries, with the intensity observed on site (Mercalli MCS scale).
- 1906NF14 July 1906
Imperceptible: only instruments record it.
Valle Scrivia earthquake (M4.2), epicentre 14 km away
- 1891V28 May 1891
Rather strong: felt by almost everyone; hanging objects swing.
Alessandrino earthquake (M4.1), epicentre 5 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 24 km from Eastern Monferrato, 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).
Over time within 30 km
Earthquake map within 30 km
60 eventsLatest earthquakes within 30 km
Nearby towns
How does it compare with the surroundings?
Castelletto d'Orba 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 Alessandria0 events · last 30 daysPiedmont region58 events · last 30 daysFrequently asked questions
Were there earthquakes near Castelletto d'Orba today?
No, no quakes were recorded today within 30 km of Castelletto d'Orba. The latest dates back to 14 August 2026.
Is Castelletto d'Orba a seismic area?
Castelletto d'Orba 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 Castelletto d'Orba?
In the INGV catalogue since 2015, the strongest earthquake within 30 km of Castelletto d'Orba was magnitude 3.1, on 11 September 2020.
When was the last quake near Castelletto d'Orba?
The last quake recorded within 30 km of Castelletto d'Orba dates back to 14 August 2026, magnitude 1.0.
Tip. Click a nearby town to explore its seismicity.
Sources:INGV earthquake catalogueDBMI15 macroseismic historyCivil Protection seismic classification
Data: INGV — National Institute of Geophysics and Volcanology (CC-BY 4.0)