Southern Illinois lies near the Wabash Valley and New Madrid seismic zones, the source of the region’s largest potential earthquakes. This page pulls real records for Illinois: the largest earthquakes on record from USGS, how often the ground shakes nearby, tsunamis from the NOAA database, and volcanoes from the Smithsonian program. Nothing is guessed.
A quiet recent record is good news, but many damaging earthquakes strike places that were quiet for decades. The only real protection is a warning the moment the ground moves - which is exactly what the free QuakeMate app gives you, along with tsunami and volcano alerts for Illinois.
Check Illinois hazard risk in detail
An interactive breakdown of the earthquake, tsunami and volcano risk in Illinois - or search any city or region.
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Earthquake risk in Illinois - FAQ
Is Illinois at risk of earthquakes?
Yes. On average about 1 quake every 5 years nearby of magnitude 4+ within 300 km, based on the last 20 years of USGS data.
What was the biggest earthquake in Illinois?
We don't have a standout large earthquake on record close to Illinois in the modern catalog, though smaller quakes can still occur.
Does Illinois get tsunamis?
Yes - 1 tsunami since 1954 (most recently 1954) within 300 km, from the NOAA database. The deadliest killed around 7 people.
How do I get earthquake warnings in Illinois?
Download the free QuakeMate app for iPhone. It watches your location and sends a real-time push the instant a quake strikes nearby, plus tsunami and volcano alerts, with custom magnitude and distance rules. On Android, join the waitlist.