QuakeIndex

Earthquakes in Illinois

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Quiet QuakeIndex 0 / 100

0 quakes of M1.5 or larger in the last 7 days in Illinois. Normal for here is 0 to 1 in a week.

Compared against Illinois's own 10 years · USGS catalogue · updated

The last 30 days

Aug 29 Sep 13 Sep 27
Each mark is a day's largest quake within range; its size is the magnitude. The shaded band is the magnitude a day's largest quake normally falls in here (M1.9–M2.4), from this place's own 10-year record. A mark above the band is a bigger day than usual.

Live · last 7 days

Latest earthquakes in Illinois

None in Illinois in the latest snapshot we hold; the full 7 days load from USGS as this page opens.

Source USGS · snapshot of

Where this is

Centre 40.378, -89.058 — the mean of this state’s place centroids, from the US Census Bureau Gazetteer (2024). Activity is measured across a rectangle drawn around the state, so a few earthquakes just over its border are counted too.

Largest on record in and around Illinois

MagnitudeWhenWhere
M 4.0 7 km S of Williamsville, Missouri
M 3.8 Illinois-Indiana border region
M 3.8 4 km N of Bellmont, Illinois
M 3.8 4 km NW of Ohlman, Illinois
M 3.6 1 km SSW of Standard, Illinois
M 3.6 9 km ESE of Wyatt, Missouri
M 3.5 6 km NE of West Salem, Illinois
M 3.5 5 km SE of New Grand Chain, Illinois

From the QuakeIndex catalogue, built from the USGS FDSN event service · inside a rectangle drawn around Illinois, which takes in some ground over its borders.

Counties in Illinois

After an earthquake here