The map shows quakes of M1.5 and up from the last 90 days, the 6 biggest on record, and always the very latest quake — even if it was smaller than M1.5. The list below can include smaller ones the map leaves out. Tap any dot for details.
In the last 30 days, 3 earthquakes of M1.5 or bigger were recorded within 100 km of Alamosa, the biggest of them M3.7. Over the past year, M3.0+ quakes near Alamosa came at 3.2× the usual pace — busier than normal for this area. The biggest quake on record near Alamosa — records go back to 1980 — was the M4.4 of Jan 03, 2007, 14:34 UTC: 8 km SSW of Weston, Colorado.
How we figure this: 7 quakes of M3.0 or bigger within 100 km in the last 12 months (Nov 03, 2025 – Nov 03, 2026), compared with an average of 2.2 a year across the full calendar years 2016–2025, counted the same way. This compares how often quakes happened in two past periods. It is not a forecast, and it does not mean a big earthquake is on its way — nobody can predict earthquakes.
Latest earthquakes near Alamosa
| Mag | Location | Local time | Depth | Distance |
|---|---|---|---|---|
| M2.1 | 14 km SSE of Stonewall Gap, Colorado | Nov 02, 2026, 01:35 AM | 5 km | 94 km ESE |
| M2.6 | 10 km SSE of Stonewall Gap, Colorado | Nov 01, 2026, 11:14 PM | 5 km | 90 km ESE |
| M3.7 | 17 km SSW of Weston, Colorado | Nov 01, 2026, 01:55 AM | 9 km | 96 km ESE |
| M2.0 | 12 km SSE of Stonewall Gap, Colorado | Sep 04, 2026, 03:56 PM | 5 km | 91 km ESE |
| M2.1 | 14 km SW of Weston, Colorado | Sep 03, 2026, 06:31 AM | 5 km | 94 km ESE |
| M1.8 | 10 km SW of Walsenburg, Colorado | Aug 18, 2026, 02:51 PM | 5 km | 89 km E |
| M1.5 | 10 km SW of Walsenburg, Colorado | Aug 18, 2026, 09:20 AM | 5 km | 88 km E |
| M2.4 | 10 km SW of Walsenburg, Colorado | Aug 17, 2026, 09:05 PM | 5 km | 90 km E |
| M2.7 | 8 km SW of Walsenburg, Colorado | Aug 17, 2026, 07:06 AM | 5 km | 90 km E |
| M2.5 | 12 km NNW of Walsenburg, Colorado | Aug 16, 2026, 09:41 AM | 5 km | 95 km ENE |
Earthquakes per year near Alamosa (M3.0 and up, within 100 km)
M3.0–3.9 M4.0+
Each bar is one year; taller means more quakes (M3.0 and up). The dark red part is the bigger ones (M4.0+), counted inside the number above each bar — not added on top. These may be felt, depending on how far away and how deep they are. 2026 is not a full year yet — it only counts up to today. Source: USGS Earthquake Catalog.
What the last year looked like near Alamosa
Every quake of M1.5 or bigger within 100 km over the last year — 59 in total. A quake of exactly M2.0 counts in the M2.0–3.0 group.
The 6 biggest earthquakes on record near Alamosa (M4.0 and up, since 1980)
| Mag | Location | Date (UTC) | Distance |
|---|---|---|---|
| M4.4 | 8 km SSW of Weston, Colorado | Jan 03, 2007, 14:34 UTC | 97 km |
| M4.3 | 31 km S of Stonewall Gap, Colorado | Aug 01, 2004, 06:50 UTC | 95 km |
| M4.1 | 18 km SSW of Weston, Colorado | May 07, 2026, 17:44 UTC | 97 km |
| M4.0 | 19 km SSW of Weston, Colorado | Aug 26, 2023, 08:38 UTC | 100 km |
| M4.0 | 15 km N of Weston, Colorado | Dec 30, 2017, 23:46 UTC | 92 km |
| M4.0 | Colorado | Feb 06, 2016, 23:09 UTC | 91 km |
Nearby places
Monte Vista, CO (27 km) · Center, CO (38 km) · Conejos, CO (44 km) · Del Norte, CO (49 km) · San Luis, CO (49 km)
USGS data fetched Nov 03, 2026, 16:45 UTC · page built Nov 03, 2026, 16:45 UTC. How to read this page: recent-window counts cover M1.5+ events within 100 km; the 10-year layer is based on M3.0+ and the history layer on M4.0+ since 1980. Recording completeness varies by era and region — small quakes from early decades are under-recorded, so “no record” does not prove “never happened”. Depths are relative to sea level and can be slightly negative for shallow events in elevated terrain. Method: data & methodology.