EARTHQUAKES · REEVES AREA · TX2021PAOE

Magnitude 3.1 19 km WSW of Coyanosa, Texas

Monday, August 2, 2021, 1:10:55 PM Central · 2021-08-02 18:10:55 UTC

A magnitude 3.1 earthquake 19 km WSW of Coyanosa, Texas on August 2, 2021 at 1:10 PM Central, 3.5 km deep, in the Reeves County area.

It is one of 162 M2+ events TexNet has located within 10 km of this spot, 3 of them in the thirty days before it; the largest nearby was M3.6.

15 active injection or disposal wells sit within 10 km, the nearest 0.6 km away and operated by Blue Arrow Oper, LLC; together they hold 223,000 barrels a day of permitted capacity.

3 of the nearby wells report daily to TexNet; they injected 4,597 barrels a day in August 2026.

M3.1
ML, reviewed
3.5
km deep · 11,345 ft
3
M2+ within 10 km, prior 30 days
162
M2+ within 10 km, all time
15
active injection wells within 10 km
467
permitted wells within 10 km

Location

Epicenter
31.1550, -103.2390
County area
Reeves County
On a map
OpenStreetMap ↗
Catalog
TexNet earthquake catalog ↗

Around it in time and space

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

WhenMagDistanceDepth
Aug 2, 2021, 1:10 PM2.31.7 km3.1 km
Aug 2, 2021, 1:07 AM2.22.1 km3.0 km
Jul 31, 2021, 5:55 PM3.11.5 km3.8 km
Jun 14, 2021, 11:31 AM2.16.8 km1.3 km
Jun 3, 2021, 4:14 AM3.05.9 km4.5 km
Oct 31, 2021, 1:03 PM2.05.1 km2.6 km
Apr 27, 2021, 9:17 PM2.34.1 km3.9 km
Apr 27, 2021, 8:50 PM2.94.6 km4.0 km
Nov 9, 2021, 3:38 AM2.55.1 km3.7 km
Nov 9, 2021, 7:36 AM2.53.8 km3.0 km
Nov 16, 2021, 7:50 AM2.04.6 km1.7 km
Nov 17, 2021, 6:57 PM2.44 km2.7 km

Largest nearby on record: M3.6 on Oct 7, 2026.

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. 3 of these report daily to TexNet: 4.6K bbl/d in Aug 2026.

WellOperatorUIC no.DistancePermitted, bbl/dInjection zone, ft
Chaparral "B" #1Blue Arrow Oper, LLC0000646080.6 km5005,221–5,241
WBR 18 #1SWVTX Engy Oper, LLC0001136362.5 km20,0005,500–7,500
Red Horse "29" #1WShenandoah Petro Corp0000983283.3 km1,5005,250–5,392
Salty Brigham 10 #1SWRattler Midstream Oper LLC0001109843.7 km20,0006,050–7,800
Lucas 23 #1SWWaterbridge Texas Oper LLC0001127445 km12,0006,020–6,405
Lucas 23 #2SWWaterbridge Texas Oper LLC0001127455.3 km12,0005,250–6,900
Hippo 22 #1SWVTX Engy Oper, LLC0001050125.6 km20,0005,850–6,500
Lindsay #1DRattler Midstream Oper LLC0001188806.2 km10,0006,000–8,100
WBR 47 #1SWVTX Engy Oper, LLC0001138696.4 km20,0005,500–7,500
Hawg SWD #1Waterbridge Texas Oper LLC0001059296.4 km20,0005,200–8,000
EL Kabong Unit 48-18-7 #1DXTO Engy Inc0001179797.1 km20,0005,700–7,738
Old Courtney Ranch Co SWD #1Rattler Midstream Oper LLC0001180227.2 km20,0005,930–7,950
Warthog 19 #1SWVTX Engy Oper, LLC0001092277.5 km12,0005,700–7,500
Puff Adder 16 #1SWVTX Engy Oper, LLC0001160058 km15,0005,500–7,500
Zauk 39 #1SWRattler Midstream Oper LLC0001122788.1 km20,0005,350–8,000

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

About this data

TexNet catalog event tx2021paoe, as published by the 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/tx2021paoe, documented in the API reference.