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EARTHQUAKES · MARTIN AREA · TX2021STTF

Magnitude 2.3 37 km SSW of Los Ybanez, Texas

Friday, September 24, 2021, 5:56:11 PM Central · 2021-09-24 22:56:11 UTC

A magnitude 2.3 earthquake 37 km SSW of Los Ybanez, Texas on September 24, 2021 at 5:56 PM Central, 8.9 km deep, in the Martin County area.

It is one of 230 M2+ events located within 10 km of this spot, none in the thirty days before it; the largest nearby was M5.1.

15 active injection or disposal wells sit within 10 km, the nearest 0.3 km away and operated by Deep Blue Operating I LLC; together they hold 312,500 barrels a day of permitted capacity.

27 of the nearby wells report daily to TexNet; they injected 138,365 barrels a day in August 2026.

M2.3
ML, reviewed
8.9
km deep · 29,126 ft
0
M2+ within 10 km, prior 30 days
230
M2+ within 10 km, all time
15
active injection wells within 10 km
1,037
permitted wells within 10 km

Location

Epicenter
32.4216, -102.1171
County area
Martin 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
Oct 24, 2021, 6:29 PM2.01.4 km12.3 km
Aug 23, 2021, 3:26 PM2.32.8 km10.5 km
Oct 31, 2021, 6:00 PM2.10.5 km9.7 km
Nov 4, 2021, 4:53 PM2.10.3 km13.1 km
Nov 6, 2021, 1:50 PM2.41.9 km7.8 km
Nov 15, 2021, 6:10 PM2.00.6 km4.8 km
Jul 24, 2021, 11:44 PM2.04.8 km11.4 km
Nov 30, 2021, 5:48 PM2.14 km5.6 km
Dec 1, 2021, 6:30 PM2.00.6 km11.4 km
Jul 16, 2021, 7:51 AM2.83.5 km5.3 km
Jun 28, 2021, 3:01 AM2.74 km10.7 km
Jun 17, 2021, 1:07 AM3.14.9 km11.9 km

Largest nearby on record: M5.1 on Sep 17, 2024.

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. 27 of these report daily to TexNet: 138K bbl/d in Aug 2026.

WellOperatorUIC no.DistancePermitted, bbl/dInjection zone, ft
Breedlove Ursa #2DDeep Blue Operating I LLC0001246510.3 km30,0003,988–5,308
Corsica SWD 2 #2Stonehill Martin, LLC0001260901.6 km20,0004,200–5,228
University "7-15" #1DPioneer Natural Res. USA, Inc.0001154425.4 km25,0004,500–5,600
Breedlove, F. D., -B- #47Ovintiv USA Inc.0000998955.6 km10,00011,242–12,617
Univ. 14-7 #3DOvintiv USA Inc.0000189435.7 km7,5004,525–5,470
Golden Tornadoes SWD #1Deep Blue Operating I LLC0001159755.9 km30,00012,380–13,965
University 7-27 SWD #D 2Deep Blue Operating I LLC0001153396.2 km40,00012,700–14,200
Pinotage SWD #1Deep Blue Operating I LLC0001062816.6 km20,0005,550–6,175
Breedlove, F. D., -B- #49Ovintiv USA Inc.0001051216.7 km10,00011,745–12,675
Capri SWD #2Stonehill Martin, LLC0001259866.7 km20,0004,350–5,700
University SWD #D 1Deep Blue Operating I LLC0001101147 km20,0004,800–5,550
Capri SWD #1Stonehill Martin, LLC0001182297 km30,0004,500–5,680
Herding Cats #1DDeep Blue Operating I LLC0001190037.3 km30,00012,250–14,500
Mabee Foundation #1REDeep Blue Operating I LLC0001034137.7 km15,0005,550–6,175
University -B- #2Crosstex Services, L.L.C.0000794087.7 km5,0004,940–6,500

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

About this data

Event tx2021sttf 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/tx2021sttf, documented in the API reference.