Earthquakes in Gradisca d'Isonzo
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 = 0.164 g (10% probability of exceedance in 50 years, rigid soil).
The “area” is Gradisca d'Isonzo plus nearby towns.
The seismic history of Gradisca d'Isonzo
The earthquakes that were actually felt in Gradisca d'Isonzo over the centuries, with the intensity observed on site (Mercalli MCS scale).
- 2004IV12 July 2004
Moderate: felt by many indoors; glasses and dishes rattle.
Slovenia nord-occidentale earthquake (M5.1), epicentre 48 km away
- 1991IV5 October 1991
Moderate: felt by many indoors; glasses and dishes rattle.
Prealpi Giulie earthquake (M4.5), epicentre 41 km away
- 1990IV11 November 1990
Moderate: felt by many indoors; glasses and dishes rattle.
Slovenia occidentale earthquake (M4.6), epicentre 52 km away
- 1979III18 April 1979
Light: felt by few people, like a passing truck.
Friuli earthquake (M4.7), epicentre 52 km away
- 1976VI-VII6 May 1976
Very strong: hard to stand; chimneys and roof tiles fall, serious damage to weaker buildings.
Friuli earthquake (M6.5), epicentre 48 km away
- 1928IV27 March 1928
Moderate: felt by many indoors; glasses and dishes rattle.
Carnia earthquake (M6.0), epicentre 66 km away
- 1909IV13 January 1909
Moderate: felt by many indoors; glasses and dishes rattle.
Emilia Romagna orientale earthquake (M5.4), epicentre 202 km away
- 1898V20 February 1898
Rather strong: felt by almost everyone; hanging objects swing.
Valli del Natisone earthquake (M5.1), epicentre 24 km away
- 1897III15 July 1897
Light: felt by few people, like a passing truck.
Ljubljana earthquake (M5.0), epicentre 78 km away
- 1895F10 June 1895
Moderate: felt by many indoors; glasses and dishes rattle.
Prealpi Trevigiane earthquake (M4.8), epicentre 109 km away
- 1895V14 April 1895
Rather strong: felt by almost everyone; hanging objects swing.
Ljubljana earthquake (M6.0), epicentre 84 km away
- 1511VI-VII26 March 1511
Very strong: hard to stand; chimneys and roof tiles fall, serious damage to weaker buildings.
Friuli-Slovenia earthquake (M6.3), epicentre 41 km away
…and 7 more documented effects in this town's history.
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 4 km from Northern Trieste Gulf, 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
7 eventsEarthquakes in the area
Nearby towns
How does it compare with the surroundings?
Gradisca d'Isonzo 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 Gorizia0 events · 30gFriuli-Venezia Giulia region22 events · 30gFrequently asked questions
Were there earthquakes today in Gradisca d'Isonzo?
No, no quakes were recorded today in the Gradisca d'Isonzo area: the latest nearby dates back to 14 months ago.
Is Gradisca d'Isonzo a seismic area?
Gradisca d'Isonzo 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 Gradisca d'Isonzo?
In the last ~11 years of INGV data, the strongest within 30 km of Gradisca d'Isonzo was magnitude 3.2, in 2022.
When was the last quake near Gradisca d'Isonzo?
The last quake recorded within 30 km of Gradisca d'Isonzo was 6 months ago.
Tip. Click a nearby town to explore its seismicity.
Data: INGV — National Institute of Geophysics and Volcanology (CC-BY 4.0)