QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

4 km N of Midway, Arkansas

· 4.2 km deep · released about 40 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Baxter County 20 kmOzark County 24 kmMarion County 27 kmBoone County 57 kmFulton County 58 kmTaney County 58 kmDouglas County 58 kmIzard County 62 kmSearcy 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 2.1 (md)
Depth
4.2 km below the surface
Felt
no reports yet
Nearest
Baxter County, 20 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 854 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 40 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 380,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 270,000× the energy of this one
  3. Around the size people start to feel M 3.0 24× the energy of this one
  4. This earthquake M 2.1 about 40 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 36.4302, -92.4593. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Baxter County, AR 20 km (13 mi) NW of here earthquakes near Baxter County
Ozark County, MO 24 km (15 mi) S of here earthquakes near Ozark County
Marion County, AR 27 km (17 mi) NE of here earthquakes near Marion County
Boone County, AR 57 km (36 mi) ENE of here earthquakes near Boone County
Fulton County, AR 58 km (36 mi) W of here earthquakes near Fulton County
Taney County, MO 58 km (36 mi) ESE of here earthquakes near Taney County

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

Aftershocks so far

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

  1. 2.4 4 km E of Diamond City, Arkansas
  2. 2.1 6 km ESE of Pontiac, Missouri
  3. 2.2 2 km WSW of Gainesville, Missouri
  4. 2.0 14 km ENE of South Lead Hill, Arkansas
  5. 2.2 14 km E of South Lead Hill, Arkansas
  6. 1.9 13 km ENE of South Lead Hill, Arkansas
  7. 2.4 14 km E of South Lead Hill, Arkansas
  8. 1.9 14 km E of South Lead Hill, Arkansas
  9. 2.2 15 km WNW of Bull Shoals, Arkansas
  10. 2.5 14 km E of South Lead Hill, Arkansas
  11. 2.5 14 km E of South Lead Hill, Arkansas
  12. 2.3 14 km E of South Lead Hill, Arkansas

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.