Buying a home in Ostra
6,398 residents at the 2021 census, 2,428 buildings and 47.2 km² of territory, Marche.
Ostra is in seismic zone 2: in this zone strong earthquakes are possible. According to ISPRA’s mosaic, 8% of the territory of Ostra has high or very high landslide hazard (P3 and P4), with 1.5% of the residents. 6.6% of the territory of Ostra is in the flood area of the medium-probability scenario (P2), with 12.8% of the residents.
Find your address in Ostra
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Ostra compared
| ISPRA indicator | Ostra | AN | Marche |
|---|---|---|---|
| Landslide, very high hazard (P4) | 0% | 0.2% | 0.7% |
| Landslide, high hazard (P3) | 8% | 8.7% | 6.9% |
| Landslide, areas of attention | 0% | 0% | 0% |
| Residents in landslide areas P3-P4 | 1.5% | 2.6% | 1.9% |
| Buildings in landslide areas P3-P4 | 2% | 3.1% | 2.7% |
| Flood, high probability (P3) | -1% | 0% | 0.1% |
| Flood, medium probability (P2) | 6.6% | 3.3% | 2.7% |
| Flood, low probability (P1) | 6.6% | 4.4% | 4% |
| Residents in P2 flood areas | 12.8% | 4.6% | 5.2% |
| Buildings in P2 flood areas | 12.5% | 5.9% | 5.7% |
Questions
Which seismic zone is Ostra in?
Ostra is in seismic zone 2: in this zone strong earthquakes are possible.
How much of Ostra is in landslide class P3/P4?
According to ISPRA’s mosaic, 8% of the territory of Ostra has high or very high landslide hazard (P3 and P4), with 1.5% of the residents. By share of territory with landslide hazard P3-P4, Ostra ranks 26th of 47 municipalities in the province of Ancona.
How much of Ostra is in flood scenario P2?
6.6% of the territory of Ostra is in the flood area of the medium-probability scenario (P2), with 12.8% of the residents. By share of territory in the P2 flood area, Ostra ranks 10th of 47 municipalities in the province of Ancona.
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 |
|---|---|---|---|
| Belvedere Ostrense | 2 | 22% | 0% |
| Ostra Vetere | 2 | 7% | 3.9% |
| Morro d’Alba | 2 | 9.1% | 0% |
| San Marcello | 2 | 29.6% | 0% |
| Montecarotto | 2 | 14.1% | 0% |
| Corinaldo | 2 | 11.8% | 3.5% |
Sources: ISPRA IdroGEO, Civil Protection, Istat (25 October 2026).
Updated on