Earthquake · reviewed by a seismologist
M 3.0md
Earthquake near Irmo, SC
No earthquake was likely felt in Irmo in the 24 hours to 9:10 am EST (14:10 UTC). The last one was M 1.9, 11 km (7 mi) N, at 11:41 am EDT on 22 May 2026, estimated intensity II (weak) in town. Every earthquake near Irmo
This page: a magnitude 3.0 earthquake was recorded 6 km (4 mi) west-southwest of Irmo, SC, at 12:17 pm EST on 26 February 2026 (17:17 UTC), less than 1 km deep. 2,494 people have reported feeling it to USGS.
USGS: 5 km WSW of Irmo, South Carolina
31 km (19 mi) W of Columbia, SC · 133 km (82 mi) SSW of Charlotte, NC
- When
- 12:17 pm EST on 26 February 2026 ()
- Where
- 6 km (4 mi) west-southwest of Irmo, SC · earthquakes near Irmo
- South Carolina today
- every earthquake in South Carolina in the last 24 hours
- Magnitude
- M 3.0 (md)
- Depth
- 0.1 km below the surface
- Felt
- 2,494 reports · strongest reported intensity IV
- Nearest
- Lexington County, 19 km S
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 167 days ago
Earthquake alerts for Irmo, SC
Get a notification in this browser when USGS records an earthquake near Irmo, SC. No account or email needed.
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 73 km (45 mi) from the epicentre. In Irmo, 6 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.
Likely felt in: Columbia 20 km, intensity III · Dentsville 26 km, intensity III. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 950 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 350,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 16,000× the energy of this one
- Magna, Utah 2020 M 5.7 11,000× the energy of this one
- This earthquake M 3.0 about 950 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.
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 34.0638, -81.2407. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Lexington County, SC | 19 km (12 mi) | S | earthquakes near Lexington County |
| Richland County, SC | 32 km (20 mi) | E | earthquakes near Richland County |
| Fairfield County, SC | 38 km (24 mi) | NNE | earthquakes near Fairfield County |
| Newberry County, SC | 42 km (26 mi) | NW | earthquakes near Newberry County |
| Saluda County, SC | 45 km (28 mi) | W | earthquakes near Saluda County |
| Calhoun County, SC | 61 km (38 mi) | SE | earthquakes near Calhoun County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
9 earthquakes have been recorded within 50 km since this one.
- 1.6 9 km NNE of Jenkinsville, South Carolina
- 2.2 6 km E of Elgin, South Carolina
- 1.9 19 km NW of Winnsboro, South Carolina
- 1.9 11 km N of Irmo, South Carolina
- 2.4 18 km NW of Winnsboro, South Carolina
- 2.3 17 km NW of Winnsboro, South Carolina
- 2.3 18 km NW of Winnsboro, South Carolina
- 2.1 3 km W of Irmo, South Carolina
- 2.2 5 km SSE of Lake Murray of Richland, South Carolina
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.