Oklahoma earthquakes

M3.6 earthquake 7 km ENE of Harrah, Oklahoma

A magnitude 3.6 earthquake struck 7 km ENE of Harrah, Oklahoma on Tue, Apr 26, 2016, 10:44 AM CDT (15:44 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M3.7 5 km W of Fallis, Oklahoma. This one was a foreshock.

Harrah forecastMore in Oklahoma

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
3.6 (mwr), minor
Local time
UTC
2016-04-26 15:44:11 UTC
Depth
6.9 km (4.3 mi), shallow
Epicenter
35.520° N, 97.090° W
Region
Oklahoma
Felt reports
45
Strongest shaking
IV, light shaking
PAGER alert
Green
Tsunami flag
No
Status
Reviewed by a seismologist

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Strongest estimated
IV, light shaking
Map
Automatic
USGS ShakeMap: estimated shaking intensity around the epicenter
Estimated shaking intensity. Map: USGS ShakeMap.

Did you feel it?

45 people reported to the USGS what they felt; the strongest reported shaking was IV, light shaking.

Did You Feel It? map: shaking reported by the public
Shaking reported by the public, by area. Map: USGS Did You Feel It?

Estimated impact

The USGS PAGER system estimates deaths and economic losses from the shaking and the population and buildings exposed to it.

Alert level
Green: little or no damage or loss of life expected

Fault motion and ground failure

How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.

Faulting
Strike-slip
Moment magnitude
3.6 Mwr
Nodal plane 1
Strike 41°, dip 69°, rake -154°
Nodal plane 2
Strike 301°, dip 65°, rake -23°

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 1.7 km horizontally, 5.3 km in depth
Magnitude uncertainty
±0.05
Station coverage gap
40°
Stations used
0

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 150 in the 60 days after this one and 49 in the 30 days before it.

After

The first 60 of 150.

Before

Earthquakes todayOklahoma earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us10005bn1. Read Tue, Sep 22, 2026, 4:16 PM UTC.