Buying a home in San Gemini
4,769 residents at the 2021 census, 2,130 buildings and 27.9 km² of territory, Umbria.
San Gemini is in seismic zone 2: in this zone strong earthquakes are possible. According to ISPRA’s mosaic, 10.3% of the territory of San Gemini has high or very high landslide hazard (P3 and P4), with 2.1% of the residents. 0.2% of the territory of San Gemini is in the flood area of the medium-probability scenario (P2), with 0.7% of the residents.
Find your address in San Gemini
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San Gemini compared
| ISPRA indicator | San Gemini | TR | Umbria |
|---|---|---|---|
| Landslide, very high hazard (P4) | 0% | 0.2% | 0.1% |
| Landslide, high hazard (P3) | 10.3% | 6.1% | 5.8% |
| Landslide, areas of attention | 0% | 0% | 0% |
| Residents in landslide areas P3-P4 | 2.1% | 2.4% | 2.1% |
| Buildings in landslide areas P3-P4 | 3.3% | 4.5% | 3% |
| Flood, high probability (P3) | 0.2% | 2.9% | 3% |
| Flood, medium probability (P2) | 0.2% | 3.8% | 4.3% |
| Flood, low probability (P1) | 0.3% | 4.2% | 6% |
| Residents in P2 flood areas | 0.7% | 6.9% | 7.2% |
| Buildings in P2 flood areas | 0.6% | 5.7% | 6.5% |
Questions
Which seismic zone is San Gemini in?
San Gemini is in seismic zone 2: in this zone strong earthquakes are possible.
How much of San Gemini is in landslide class P3/P4?
According to ISPRA’s mosaic, 10.3% of the territory of San Gemini has high or very high landslide hazard (P3 and P4), with 2.1% of the residents. By share of territory with landslide hazard P3-P4, San Gemini ranks 5th of 33 municipalities in the province of Terni.
How much of San Gemini is in flood scenario P2?
0.2% of the territory of San Gemini is in the flood area of the medium-probability scenario (P2), with 0.7% of the residents. By share of territory in the P2 flood area, San Gemini ranks 25th of 33 municipalities in the province of Terni.
Guides: seismic zone · landslides and floods · what to check before an offer. OMI prices: GEOPOI (how to read them).
Nearby municipalities
| Municipality | Seismic zone | Landslide P3-P4 | Flood P2 |
|---|---|---|---|
| Montecastrilli | 2 | 9.9% | 0.1% |
| Acquasparta | 2 | 6.6% | 0.8% |
| Narni | 2 | 9.9% | 8.6% |
| Terni | 2 | 3.5% | 6.8% |
| Avigliano Umbro | 2 | 3.5% | 0% |
| Amelia | 2 | 6.5% | 0.1% |
Sources: ISPRA IdroGEO, Civil Protection, Istat (25 October 2026).
Updated on