Earthquake · reviewed by a seismologist
M 2.9mb_lg
21 km ENE of Kenilworth, Illinois
- When
- Magnitude
- M 2.9 (mb_lg)
- Depth
- 5.0 km below the surface
- Felt
- 612 reports · strongest reported intensity IV
- Measured shaking
- intensity IV (ShakeMap)
- Nearest
- Lake County, 26 km W
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 8 days ago
This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 612 people have reported feeling it to USGS.
How big was it?
This earthquake released about 680 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 22,000× the energy of this one
- Magna, Utah 2020 M 5.7 16,000× the energy of this one
- Around the size people start to feel M 3.0 1.4× the energy of this one
- This earthquake M 2.9 about 680 lb of TNT
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.
Where
Epicentre 42.1744, -87.4862. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Lake County, IL | 26 km (16 mi) | E of here | earthquakes near Lake County |
| Cook County, IL | 34 km (21 mi) | NNE of here | earthquakes near Cook County |
| Kenosha County, WI | 56 km (35 mi) | SE of here | earthquakes near Kenosha County |
| DuPage County, IL | 61 km (38 mi) | NE of here | earthquakes near DuPage County |
| Racine County, WI | 71 km (44 mi) | SSE of here | earthquakes near Racine County |
| Berrien County, MI | 75 km (46 mi) | NW of here | earthquakes near Berrien County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
No further earthquakes have been recorded within 50 km since this one.
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.