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EARTHQUAKES · MITCHELL AREA · TX2024OCHC

Magnitude 3.6 6 km WSW of Westbrook, Texas

Friday, July 19, 2024, 6:21:20 AM Central · 2024-07-19 11:21:20 UTC

A magnitude 3.6 earthquake 6 km WSW of Westbrook, Texas on July 19, 2024 at 6:21 AM Central, 8.6 km deep, in the Mitchell County area.

It is one of 43 M2+ events located within 10 km of this spot, 2 of them in the thirty days before it; the largest nearby was M4.3.

15 active injection or disposal wells sit within 10 km, the nearest 0.3 km away and operated by Grayrock Energy II, LLC; together they hold 10,100 barrels a day of permitted capacity.

6 of the nearby wells report daily to TexNet; they injected 1,382 barrels a day in August 2026.

M3.6
ML, reviewed
8.6
km deep · 28,276 ft
2
M2+ within 10 km, prior 30 days
43
M2+ within 10 km, all time
15
active injection wells within 10 km
69
permitted wells within 10 km

Location

Epicenter
32.3300, -101.0770
County area
Mitchell County
On a map
Google Maps ↗
Catalog
USGS event page ↗ · TexNet catalog ↗

Around it in time and space

M2+ events within 10 km, nearest in time first.

WhenMagDistanceDepth
Jul 18, 2024, 5:19 AM2.39 km3.5 km
Jul 29, 2024, 4:04 PM2.70.4 km8.9 km
Aug 3, 2024, 4:25 PM2.10.8 km7.8 km
Jun 23, 2024, 10:06 PM2.25.5 km5.7 km
Jun 9, 2024, 10:12 AM2.77 km6.2 km
Jun 5, 2024, 4:45 AM2.34.5 km8.4 km
May 23, 2024, 3:31 PM2.87.2 km4.3 km
Mar 3, 2024, 3:07 AM2.13.4 km4.9 km
Mar 1, 2024, 10:07 AM2.53.7 km8.5 km
Mar 1, 2024, 7:11 AM2.14.6 km5.0 km
Dec 15, 2024, 9:15 PM2.48.4 km8.2 km
Jan 17, 2024, 8:31 PM2.14.3 km8.7 km

Largest nearby on record: M4.3 on Oct 12, 2025.

Injection wells within 10 km

RRC UIC MASTER · ACTIVE PERMITS

Proximity is not attribution. The wells are listed because the question is always asked; whether any of them is connected to this event is for the RRC's seismic response review, not this page. 6 of these report daily to TexNet: 1.38K bbl/d in Aug 2026.

WellOperatorUIC no.DistancePermitted, bbl/dInjection zone, ft
Westbrook Southwest Unit #202AWGrayrock Energy II, LLC0000220310.3 km7002,300–3,300
Westbrook Southwest Unit #205WGrayrock Energy II, LLC0000220350.5 km7002,300–3,300
Westbrook Southwest Unit #211WGrayrock Energy II, LLC0000220360.6 km7002,300–3,300
Westbrook Southwest Unit #213WGrayrock Energy II, LLC0000220380.7 km7002,300–3,300
Westbrook Southwest Unit #204WGrayrock Energy II, LLC0000220340.8 km7002,300–3,300
Westbrook Southwest Unit #2014Grayrock Energy II, LLC0000975440.9 km7002,300–3,300
Westbrook Southwest Unit #194WGrayrock Energy II, LLC0000220271.1 km7002,300–3,300
Westbrook Southwest Unit #4JWGrayrock Energy II, LLC0000602981.3 km7002,300–3,300
Westbrook Southwest Unit #173Grayrock Energy II, LLC0000463291.4 km7002,300–3,300
Westbrook Southwest Unit #1906WGrayrock Energy II, LLC0000427311.6 km7002,300–3,300
Westbrook Southwest Unit #1520WGrayrock Energy II, LLC0000988781.8 km5002,300–3,300
Westbrook Southwest Unit #192WGrayrock Energy II, LLC0000220251.9 km7002,300–3,300
Westbrook Southwest Unit #1006WGrayrock Energy II, LLC0000427301.9 km7002,300–3,300
Westbrook Southwest Unit #1032WGrayrock Energy II, LLC0000905831.9 km7002,300–3,300
Westbrook Southwest Unit #1508Grayrock Energy II, LLC0000987921.9 km5002,300–3,300

Disposal in Mitchell County → · How disposal permits and volumes work →

About this data

Event tx2024ochc from the USGS earthquake catalog, located by TexNet (UT Bureau of Economic Geology) and refreshed daily. Nearby wells from the RRC UIC well master and permit coordinates; daily volumes from the TexNet injection reporting tool.

Developers: this page as JSON is GET /v1/data/earthquakes/tx/events/tx2024ochc, documented in the API reference.