Earthquake near Harrison, AR

USGS: 1 km SSW of Diamond City, Arkansas

89 km (55 mi) SSE of Springfield, MO

5:51 am CDT, Apr 10, 2017 · 2017-04-10 10:51 UTC · 6.9 km deep · released about 16 lb of TNT

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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: 5:51 am CDT on 10 April 2017 (2017-04-10 10:51 UTC)
Where: 29 km (18 mi) NNE of Harrison, AR · earthquakes near Harrison
Magnitude: M 1.8 (md)
Depth: 6.9 km below the surface
Felt: no reports yet
Nearest: Boone County, 21 km SW
Status: Reviewed by a seismologist

USGS · last changed by USGS 3463 days ago · we first saw it 3463 days ago

A magnitude 1.8 earthquake was recorded 29 km (18 mi) NNE of Harrison, AR, at 5:51 am CDT on 10 April 2017 (10:51 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

Earthquakes near other towns within 30 km: Kissee Mills.

How big was it?

This earthquake released about 16 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

Mineral, Virginia 2011 M 5.8 970,000× the energy of this one
Magna, Utah 2020 M 5.7 680,000× the energy of this one
Around the size people start to feel M 3.0 61× the energy of this one
This earthquake M 1.8 about 16 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

Map loads when it scrolls into view

Epicentre 36.4505, -92.9290. Map © OpenStreetMap contributors.

Nearby places

Place	Distance	Direction from the epicentre
Boone County, AR	21 km (13 mi)	SW	earthquakes near Boone County
Taney County, MO	24 km (15 mi)	NNW	earthquakes near Taney County
Marion County, AR	30 km (19 mi)	SE	earthquakes near Marion County
Ozark County, MO	47 km (30 mi)	ENE	earthquakes near Ozark County
Carroll County, AR	56 km (35 mi)	WSW	earthquakes near Carroll County
Baxter County, AR	57 km (35 mi)	ESE	earthquakes near Baxter County

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

Aftershocks so far

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

2.1 11 km SW of Pontiac, Missouri 08:10 UTC
2.0 Missouri-Arkansas border region 08:54 UTC
2.2 6 km E of Diamond City, Arkansas 05:46 UTC
1.6 6 km E of Diamond City, Arkansas 00:06 UTC
2.8 2 km W of Pyatt, Arkansas 11:54 UTC
2.1 7 km ENE of Midway, Arkansas 21:29 UTC
1.9 1 km S of Yellville, Arkansas 17:32 UTC
2.4 6 km E of Diamond City, Arkansas 00:23 UTC
2.2 6 km E of Diamond City, Arkansas 01:17 UTC
2.0 7 km E of Diamond City, Arkansas 19:12 UTC
2.4 10 km ESE of Everton, Arkansas 02:39 UTC
2.3 4 km W of South Lead Hill, Arkansas 07:40 UTC
2.0 3 km S of Sundown, Missouri 08:26 UTC
2.0 10 km NW of Diamond City, Arkansas 01:06 UTC
2.0 7 km N of Bergman, Arkansas 11:56 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 02:53 UTC. 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.