EARTHQUAKES · IRION AREA · TX2023FFUN

Magnitude 2.1 22 km ESE of Big Lake, Texas

Thursday, March 16, 2023, 2:42:54 AM Central · 2023-03-16 07:42:54 UTC

A magnitude 2.1 earthquake 22 km ESE of Big Lake, Texas on March 16, 2023 at 2:42 AM Central, 2.0 km deep, in the Irion County area.

It is one of 3 M2+ events located within 10 km of this spot, none in the thirty days before it; this is the largest of them.

15 active injection or disposal wells sit within 10 km, the nearest 3.9 km away and operated by Diamondback E&P LLC; together they hold 248,100 barrels a day of permitted capacity.

1 of the nearby wells report daily to TexNet; they injected 642 barrels a day in August 2026.

M2.1: ML, reviewed
2.0: km deep · 6,660 ft
0: M2+ within 10 km, prior 30 days
3: M2+ within 10 km, all time
15: active injection wells within 10 km
297: permitted wells within 10 km

Location

Epicenter: 31.1343, -101.2382
County area: Irion 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.

When	Mag	Distance	Depth
Oct 7, 2023, 10:24 PM	2.1	3.9 km	5.0 km
Sep 29, 2025, 10:04 AM	2.0	7.4 km	5.9 km

Largest nearby on record: M2.1 on Oct 8, 2023.

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. 1 of these report daily to TexNet: 642 bbl/d in Aug 2026.

Well	Operator	UIC no.	Distance	Permitted, bbl/d	Injection zone, ft
University Unit '5-20-21' #1SW	Diamondback E&P LLC	000108965	3.9 km	7,000	8,850–9,900
University 43-14 #1SW	Permian Resources Operating, LLC	000107661	5.3 km	20,000	8,960–11,200
Barnhart SWD #1	DKL Water Gathering Permian, LLC	000106370	6.2 km	20,000	8,800–11,000
Venado North SWD #2	Pilot Water Solutions SWD LLC	000111667	6.6 km	30,000	2,600–4,010
Barnhart 687 SWD #3	Direct Midstream LLC	000108925	7.2 km	40,000	8,932–9,940
University 40 #1101WD	Sem Operating Company LLC	000102735	7.3 km	10,000	8,600–9,780
8 Mile SWD #2	Rains Energy, LLC	000110247	7.9 km	25,000	2,700–3,500
University 48-2WX #10	Eagle Capital Partners, LLC	000105659	8.1 km	5,000	3,001–3,500
Murphey West SWD #1	Pilot Water Solutions SWD LLC	000111100	8.3 km	30,000	2,600–3,700
University "19-G" #10	Extex Operating Company	000072426	8.9 km	800	2,465–3,356
Section 209 SWD #1	Pilot Water Solutions SWD LLC	000117618	9.1 km	40,000	9,960–10,800
Rock Hollow #190WD	Discovery Natural Resources LLC	000110142	9.2 km	20,000	2,200–3,500
State "VE" #4C	Woodbine Production Corporation	000052968	9.3 km	—	8,688
University -A- #6W	Quatro Oil and Gas, Inc.	000061185	9.7 km	300	1,732–1,770
Barnhart (Ellenburger)unit #1	Martin, Jimmy Inc	000089860	9.8 km	—	9,022–9,174

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

About this data

Event tx2023ffun 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/tx2023ffun, documented in the API reference.