Earthquakes in Trezzo sull'Adda
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 = 0.085 g (10% probability of exceedance in 50 years, rigid soil).
The “area” is Trezzo sull'Adda plus nearby towns.
The seismic history of Trezzo sull'Adda
The earthquakes that were actually felt in Trezzo sull'Adda over the centuries, with the intensity observed on site (Mercalli MCS scale).
- 1995NF29 October 1995
Imperceptible: only instruments record it.
Lago d'Iseo earthquake (M4.3), epicentre 30 km away
- 1991NF20 November 1991
Imperceptible: only instruments record it.
Grigioni, Vaz earthquake (M4.7), epicentre 125 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 3 km from Western S-Alps internal thrust, 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
4 eventsEarthquakes in the area
Nearby towns
How does it compare with the surroundings?
Trezzo sull'Adda 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 Trezzo sull'Adda?
No, no quakes were recorded today in the Trezzo sull'Adda area: the latest nearby dates back to 27 months ago.
Is Trezzo sull'Adda a seismic area?
Trezzo sull'Adda 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 Trezzo sull'Adda?
In the last ~12 years of INGV data, the strongest within 30 km of Trezzo sull'Adda was magnitude 3.9, in 2021.
When was the last quake near Trezzo sull'Adda?
The last quake recorded within 30 km of Trezzo sull'Adda was 7 months ago.
Tip. Click a nearby town to explore its seismicity.
Data: INGV — National Institute of Geophysics and Volcanology (CC-BY 4.0)