The map shows quakes of M1.5 and up from the last 90 days, the 1 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 Troy. The biggest quake on record near Troy — records go back to 1980 — was the M4.3 of May 15, 1983, 05:16 UTC: 2 km ESE of Pierron, Illinois.
Latest earthquakes near Troy
| Mag | Location | Local time | Depth | Distance |
|---|---|---|---|---|
| M2.0 | 6 km SSW of Valmeyer, Illinois | Feb 01, 2026, 08:23 PM | 11 km | 65 km SW |
| M3.8 | 4 km NW of Ohlman, Illinois | Jan 20, 2026, 01:27 AM | 9 km | 90 km NE |
| M3.1 | 5 km WNW of Waltonville, Illinois | Dec 17, 2023, 10:10 PM | 17 km | 88 km SE |
| M3.1 | 9 km SSE of Mulberry Grove, Illinois | Jul 01, 2017, 01:07 PM | 17 km | 58 km ENE |
| M4.3 | 2 km ESE of Pierron, Illinois | May 15, 1983, 12:16 AM | 8 km | 28 km E |
Earthquakes per year near Troy (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 Troy
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 1 biggest earthquakes on record near Troy (M4.0 and up, since 1980)
| Mag | Location | Date (UTC) | Distance |
|---|---|---|---|
| M4.3 | 2 km ESE of Pierron, Illinois | May 15, 1983, 05:16 UTC | 28 km |
Nearby places
Maryville, IL (6 km) · Glen Carbon, IL (9 km) · Saint Jacob, IL (10 km) · Edwardsville, IL (11 km) · Highland, IL (18 km) · Greenville, IL (45 km)
USGS data fetched Nov 03, 2026, 18:45 UTC · page built Nov 03, 2026, 18:45 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.