Earthquakes in Porto Azzurro
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?
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 = 0.033 g (10% probability of exceedance in 50 years, rigid soil).
Why the ground rarely shakes here
Porto Azzurro 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 Porto Azzurro plus nearby towns.
The seismic history of Porto Azzurro
The earthquakes that were actually felt in Porto Azzurro over the centuries, with the intensity observed on site (Mercalli MCS scale).
- 1987NF22 January 1987
Imperceptible: only instruments record it.
Costa pisano-livornese earthquake (M4.2), epicentre 87 km away
- 1984NF29 April 1984
Imperceptible: only instruments record it.
Umbria settentrionale earthquake (M5.6), epicentre 182 km away
- 1920III7 September 1920
Light: felt by few people, like a passing truck.
Garfagnana earthquake (M6.5), epicentre 157 km away
- 1904NF17 November 1904
Imperceptible: only instruments record it.
Pistoiese earthquake (M5.1), epicentre 137 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 75 km from Livorno Hills, 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
60 eventsEarthquakes in the area
Nearby towns
How does it compare with the surroundings?
Porto Azzurro is quieter 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 Livorno1 events · 30gTuscany region53 events · 30gFrequently asked questions
Were there earthquakes today in Porto Azzurro?
No, no quakes were recorded today in the Porto Azzurro area: the latest nearby dates back to 3 days ago.
Is Porto Azzurro a seismic area?
Porto Azzurro 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 Porto Azzurro?
In the last ~11 years of INGV data, the strongest within 30 km of Porto Azzurro was magnitude 1.8, in 2018.
When was the last quake near Porto Azzurro?
The last quake recorded within 30 km of Porto Azzurro was 8 months ago.
Tip. Click a nearby town to explore its seismicity.
Data: INGV — National Institute of Geophysics and Volcanology (CC-BY 4.0)