Earthquakes in Seggiano
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 = 0.140 g (10% probability of exceedance in 50 years, rigid soil).
The “area” is Seggiano plus nearby towns.
The seismic history of Seggiano
The earthquakes that were actually felt in Seggiano over the centuries, with the intensity observed on site (Mercalli MCS scale).
- 2000III1 April 2000
Light: felt by few people, like a passing truck.
Monte Amiata earthquake (M4.5), epicentre 14 km away
- 1997NF14 October 1997
Imperceptible: only instruments record it.
Valnerina earthquake (M5.6), epicentre 108 km away
- 1997NF26 September 1997
Imperceptible: only instruments record it.
Appennino umbro-marchigiano earthquake (M5.7), epicentre 108 km away
- 1987NF22 January 1987
Imperceptible: only instruments record it.
Costa pisano-livornese earthquake (M4.2), epicentre 132 km away
- 1984NF29 April 1984
Imperceptible: only instruments record it.
Umbria settentrionale earthquake (M5.6), epicentre 86 km away
- 1948VI3 November 1948
Strong: felt by everyone, many get scared; objects fall, first light damage to buildings.
Monte Amiata earthquake (M4.8), epicentre 7 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 70 km from Mugello-Citta' di Castello-Leonessa, 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?
Seggiano sits in one of the most seismically active areas of its province: quakes are a familiar presence here, almost always light.
Each quake is attributed to the town closest to its epicentre: the numbers describe the area, not the municipal territory alone.
Context
Province of Grosseto1 events · 30gTuscany region112 events · 30gFrequently asked questions
Were there earthquakes today in Seggiano?
No, no quakes were recorded today in the Seggiano area: the latest nearby dates back to 6 days ago.
Is Seggiano a seismic area?
Seggiano 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 Seggiano?
In the last ~12 years of INGV data, the strongest within 30 km of Seggiano was magnitude 3.4, in 2019.
When was the last quake near Seggiano?
The last quake recorded within 30 km of Seggiano was 6 days ago.
Tip. Click a nearby town to explore its seismicity.
Data: INGV — National Institute of Geophysics and Volcanology (CC-BY 4.0)