Biggest Earthquakes in Illinois - USGS Data
Explore the 20 biggest earthquakes across Illinois in the past 365 days, sourced from USGS data. View significant and minor quakes on our interactive map. No major quakes recorded? Check activity in nearby regions.
Note: This page shows the 20 biggest earthquakes in the region in the past 365 days, regardless of magnitude. Earthquakes smaller than M4.0 are removed after 365 days.
Summary of Biggest Earthquakes
Magnitude Distribution (all magnitudes)
7 M1.5–2.9 earthquakes
3 M3.0–3.9 earthquakes
5 M5.0–5.9 earthquakes
Largest Earthquake
Most Recent Major Earthquake
Oldest Major Earthquake
Quick Stats
Time Since Last Minor earthquake
19 days since the last minor earthquake (M3.3 at 7 km SSW of Lerna, Illinois on 5/13/2025)
Average Magnitude
3.45 (range: M2.0–M5.3)
Largest Earthquake by Depth
Deepest: M2.1 at 21.3 km (4 km NW of Bone Gap, Illinois, 10/4/2024)
Shallowest: M5.1 at 0.0 km (7 km S of Fults, Illinois, 4/9/1917)