The map shows quakes of M1.5 and up from the last 90 days, the 2 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, 0 earthquakes of M1.5 or bigger were recorded within 100 km of Altamont. The biggest quake on record near Altamont — records go back to 1980 — was the M5.2 of Jun 10, 1987, 23:48 UTC: 2 km ESE of Claremont, Illinois.
Latest earthquakes near Altamont
| Mag | Location | Local time | Depth | Distance |
|---|---|---|---|---|
| M3.5 | 6 km NE of West Salem, Illinois | Jun 29, 2026, 02:05 AM | 19 km | 88 km SE |
| M3.8 | 4 km NW of Ohlman, Illinois | Jan 20, 2026, 01:27 AM | 9 km | 55 km NW |
| M3.3 | 7 km SSW of Lerna, Illinois | May 12, 2025, 11:43 PM | 10 km | 49 km NE |
| M3.1 | 5 km WNW of Waltonville, Illinois | Dec 17, 2023, 10:10 PM | 17 km | 97 km SSW |
| M3.1 | 9 km SSE of Mulberry Grove, Illinois | Jul 01, 2017, 01:07 PM | 17 km | 48 km WSW |
| M3.4 | 4 km ENE of Geff, Illinois | May 29, 2015, 07:41 PM | 26 km | 75 km SSE |
| M5.2 | 2 km ESE of Claremont, Illinois | Jun 10, 1987, 06:48 PM | 5 km | 79 km ESE |
| M4.3 | 2 km ESE of Pierron, Illinois | May 15, 1983, 12:16 AM | 8 km | 78 km WSW |
Earthquakes per year near Altamont (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 Altamont
Every quake of M1.5 or bigger within 100 km over the last year — 2 in total. A quake of exactly M2.0 counts in the M2.0–3.0 group.
The 2 biggest earthquakes on record near Altamont (M4.0 and up, since 1980)
| Mag | Location | Date (UTC) | Distance |
|---|---|---|---|
| M5.2 | 2 km ESE of Claremont, Illinois | Jun 10, 1987, 23:48 UTC | 79 km |
| M4.3 | 2 km ESE of Pierron, Illinois | May 15, 1983, 05:16 UTC | 78 km |
Nearby places
Saint Elmo, IL (9 km) · Effingham, IL (19 km) · Teutopolis, IL (25 km) · Vandalia, IL (32 km) · Pana, IL (46 km) · Flora, IL (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.