Earthquake · reviewed by a seismologist
M 3.1mw
Earthquake near Vandalia, IL
No earthquake was likely felt in Vandalia in the 24 hours to 4:33 am CST (10:33 UTC). The last one was M 3.5, 108 km (67 mi) ESE, at 2:05 am CDT on 29 June 2026, estimated intensity II (weak) in town; 392 felt reports to USGS. Every earthquake near Vandalia
This page: a magnitude 3.1 earthquake was recorded 17 km (10 mi) southwest of Vandalia, IL, at 1:07 pm CDT on 1 July 2017 (18:07 UTC), 17 km deep. 40 people have reported feeling it to USGS.
USGS: 9 km SSE of Mulberry Grove, Illinois
91 km (57 mi) ENE of St. Louis, MO
- When
- 1:07 pm CDT on 1 July 2017 ()
- Where
- 17 km (10 mi) southwest of Vandalia, IL · earthquakes near Vandalia
- Illinois today
- every earthquake in Illinois in the last 24 hours
- Magnitude
- M 3.1 (mw)
- Depth
- 17 km below the surface
- Felt
- 40 reports · strongest reported intensity III
- Nearest
- Bond County, 19 km WNW
- Nearest mapped fault
- Wabash Valley liquefaction features, under 1 km from its surface trace — near is not the same as on
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 3332 days ago
Earthquake alerts for Vandalia, IL
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Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.
At this magnitude and depth, people at rest would likely notice it out to about 143 km (89 mi) from the epicentre. In Vandalia, 17 km away, the estimate is intensity III (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.
Earthquakes near other towns within 30 km: Greenville, Sandoval, Carlyle.
How big was it?
This earthquake released about 1,400 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 230,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 10,000× the energy of this one
- Magna, Utah 2020 M 5.7 7,400× the energy of this one
- This earthquake M 3.1 about 1,400 lb of TNT
- Around the size people start to feel M 3.0 this one released 1.5× more
Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.
For this area
No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.
Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.
Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.
Where
Epicentre 38.8500, -89.2275. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Bond County, IL | 19 km (12 mi) | WNW | earthquakes near Bond County |
| Fayette County, IL | 25 km (15 mi) | NE | earthquakes near Fayette County |
| Clinton County, IL | 32 km (20 mi) | SSW | earthquakes near Clinton County |
| Marion County, IL | 35 km (22 mi) | SE | earthquakes near Marion County |
| Montgomery County, IL | 47 km (29 mi) | NNW | earthquakes near Montgomery County |
| Washington County, IL | 58 km (36 mi) | SSW | earthquakes near Washington County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
4 earthquakes have been recorded within 50 km since this one.
- 2.4 8 km WNW of Keyesport, Illinois
- 2.8 1 km NNE of Germantown, Illinois
- 2.6 6 km SSE of Herrick, Illinois
- 2.4 3 km E of Junction City, Illinois
Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.
On USGS
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.