QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

8 km E of Archdale, North Carolina

· 4.4 km deep · released about 170 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guilford County 18 kmRandolph County 25 kmDavidson County 33 kmForsyth County 41 kmAlamance County 45 kmRockingham County 51 kmDavie County 60 kmChatham County 62 kmStokes County 63 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 2.5 (md)
Depth
4.4 km below the surface
Felt
870 reports · strongest reported intensity IV
Nearest
Guilford County, 18 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2156 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 870 people have reported feeling it to USGS.

How big was it?

This earthquake released about 170 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 89,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 63,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.6× the energy of this one
  4. This earthquake M 2.5 about 170 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 35.9293, -79.8752. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guilford County, NC 18 km (11 mi) SSW of here earthquakes near Guilford County
Randolph County, NC 25 km (16 mi) NNW of here earthquakes near Randolph County
Davidson County, NC 33 km (21 mi) ENE of here earthquakes near Davidson County
Forsyth County, NC 41 km (26 mi) ESE of here earthquakes near Forsyth County
Alamance County, NC 45 km (28 mi) WSW of here earthquakes near Alamance County
Rockingham County, NC 51 km (32 mi) S of here earthquakes near Rockingham County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

21 earthquakes have been recorded within 50 km since this one.

  1. 2.0 7 km WNW of Randleman, North Carolina
  2. 1.7 8 km NW of Randleman, North Carolina
  3. 1.6 7 km NW of Randleman, North Carolina
  4. 2.4 7 km NW of Randleman, North Carolina
  5. 1.9 7 km NW of Randleman, North Carolina
  6. 1.9 7 km NW of Randleman, North Carolina
  7. 2.3 8 km WNW of Randleman, North Carolina
  8. 2.3 8 km NW of Randleman, North Carolina
  9. 2.2 3 km WSW of McLeansville, North Carolina
  10. 2.3 4 km WSW of McLeansville, North Carolina
  11. 2.0 6 km E of Archdale, North Carolina
  12. 1.9 5 km SW of Winston-Salem, North Carolina
  13. 2.0 7 km SSW of Winston-Salem, North Carolina
  14. 1.7 7 km E of Lewisville, North Carolina
  15. 2.3 6 km SW of Winston-Salem, North 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

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.