Oklahoma

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 67 km (42 mi) from the epicentre. 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: Blackwell 16 km, intensity III · Caldwell 24 km, intensity III · Ponca City 36 km, intensity II · Wellington 46 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 650 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

1. Mineral, Virginia 2011 M 5.8 23,000× the energy of this one
2. Magna, Utah 2020 M 5.7 16,000× the energy of this one
3. Around the size people start to feel M 3.0 1.5× the energy of this one
4. This earthquake M 2.9 about 650 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

The largest earthquake within 50 km since 2016 was M 4.4 on 2019-05-17 — about 180 times the energy of this one.

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 36.8583, -97.4453. Map © OpenStreetMap contributors.

Nearby places

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

Aftershocks so far

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

1. 1.8 4 km SSW of Braman, Oklahoma 09:30 UTC
2. 2.3 1 km SSW of Renfrow, Oklahoma 15:24 UTC
3. 1.5 9 km WSW of Hunnewell, Kansas 18:45 UTC
4. 1.8 10 km W of Lamont, Oklahoma 21:38 UTC
5. 1.6 6 km NNE of Medford, Oklahoma 22:09 UTC
6. 2.4 5 km S of Bluff City, Kansas 06:50 UTC
7. 2.1 10 km W of Lamont, Oklahoma 05:31 UTC
8. 1.8 9 km ESE of Jefferson, Oklahoma 10:00 UTC
9. 1.6 10 km N of Deer Creek, Oklahoma 05:22 UTC
10. 1.7 6 km N of Nardin, Oklahoma 03:33 UTC
11. 1.7 7 km N of Nardin, Oklahoma 03:22 UTC
12. 3.7 6 km N of Nardin, Oklahoma 21:47 UTC
13. 2.9 10 km ESE of Jefferson, Oklahoma 19:57 UTC
14. 1.9 10 km ESE of Jefferson, Oklahoma 01:49 UTC
15. 1.5 5 km WNW of Braman, Oklahoma 00:38 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 14:39 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.