QuakeIndex

Earthquake · reviewed by a seismologist

M 3.7mw

13 km N of Big Flat, Arkansas

· 18 km deep · released about 5.4 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Baxter County 18 kmMarion County 29 kmSearcy County 37 kmStone County 38 kmIzard County 44 kmOzark County 58 kmFulton County 60 kmVan Buren County 61 kmBoone 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 3.7 (mw)
Depth
18 km below the surface
Felt
4229 reports · strongest reported intensity V
Measured shaking
intensity IV (ShakeMap)
Nearest
Baxter County, 18 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2110 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 4229 people have reported feeling it to USGS.

How big was it?

This earthquake released about 5.4 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.7 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 32,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,400× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,000× the energy of this one
  4. This earthquake M 3.7 about 5.4 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 11× 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.

Where

Epicentre 36.1278, -92.4062. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Baxter County, AR 18 km (11 mi) SSW of here earthquakes near Baxter County
Marion County, AR 29 km (18 mi) ESE of here earthquakes near Marion County
Searcy County, AR 37 km (23 mi) NE of here earthquakes near Searcy County
Stone County, AR 38 km (24 mi) NW of here earthquakes near Stone County
Izard County, AR 44 km (28 mi) W of here earthquakes near Izard County
Ozark County, MO 58 km (36 mi) S of here earthquakes near Ozark County

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

Aftershocks so far

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

  1. 2.1 6 km ESE of Pontiac, Missouri
  2. 2.0 14 km ENE of South Lead Hill, Arkansas
  3. 2.2 14 km E of South Lead Hill, Arkansas
  4. 1.9 13 km ENE of South Lead Hill, Arkansas
  5. 2.4 14 km E of South Lead Hill, Arkansas
  6. 1.9 14 km E of South Lead Hill, Arkansas
  7. 2.2 15 km WNW of Bull Shoals, Arkansas
  8. 2.5 14 km E of South Lead Hill, Arkansas
  9. 2.5 14 km E of South Lead Hill, Arkansas
  10. 2.3 14 km E of South Lead Hill, Arkansas
  11. 2.1 4 km N of Midway, Arkansas
  12. 1.7 13 km E of South Lead Hill, Arkansas
  13. 2.2 15 km WNW of Bull Shoals, Arkansas
  14. 2.3 14 km E of South Lead Hill, Arkansas
  15. 2.4 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.