EARTHQUAKES · MCMULLEN AREA · TX2021OJIT
Magnitude 3.1 11 km NW of Tilden, Texas
Saturday, July 24, 2021, 3:08:40 AM Central · 2021-07-24 08:08:40 UTC
A magnitude 3.1 earthquake 11 km NW of Tilden, Texas on July 24, 2021 at 3:08 AM Central, 4.8 km deep, in the McMullen County area.
It is one of 22 M2+ events located within 10 km of this spot, 2 of them in the thirty days before it; the largest nearby was M3.3.
6 active injection or disposal wells sit within 10 km, the nearest 5 km away and operated by Evx Operating LLC; together they hold 83,000 barrels a day of permitted capacity.
- M3.1
- ML, reviewed
- 4.8
- km deep · 15,650 ft
- 2
- M2+ within 10 km, prior 30 days
- 22
- M2+ within 10 km, all time
- 6
- active injection wells within 10 km
- 245
- permitted wells within 10 km
Location
- Epicenter
- 28.5240, -98.6400
- County area
- McMullen 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 |
|---|---|---|---|
| Jul 24, 2021, 12:46 PM | 2.2 | 2.7 km | 4.0 km |
| Jul 23, 2021, 3:59 PM | 2.2 | 1.2 km | 3.8 km |
| Jul 15, 2021, 11:30 PM | 2.3 | 0.9 km | 5.9 km |
| Jun 13, 2021, 12:17 PM | 2.7 | 1.2 km | 4.5 km |
| May 27, 2021, 5:56 PM | 2.2 | 2 km | 6.1 km |
| May 19, 2022, 6:52 AM | 2.2 | 1.5 km | 4.0 km |
| May 20, 2022, 9:04 PM | 2.0 | 1.8 km | 6.7 km |
| Oct 26, 2022, 11:42 AM | 2.8 | 1.2 km | 4.8 km |
| Oct 26, 2022, 1:04 PM | 3.3 | 0.1 km | 4.7 km |
| Oct 26, 2022, 2:09 PM | 2.3 | 4.8 km | 3.7 km |
| Oct 26, 2022, 6:44 PM | 2.3 | 1 km | 5.6 km |
| Dec 17, 2022, 12:43 AM | 2.0 | 2.1 km | 6.4 km |
Largest nearby on record: M3.3 on Oct 26, 2022.
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.
| Well | Operator | UIC no. | Distance | Permitted, bbl/d | Injection zone, ft |
|---|---|---|---|---|---|
| KHC SWD 1 #1 | Evx Operating LLC | 000107311 | 5 km | 30,000 | 5,470–6,100 |
| Milestone SWD #2 | Evx Operating LLC | 000117499 | 5.1 km | 30,000 | 10,500–12,100 |
| Bek Unit #1H | Murphy Expl. & Prod. Co. - USA | 000122900 | 6.7 km | — | 10,267–10,275 |
| Edwards Unit #1H | Murphy Expl. & Prod. Co. - USA | 000123502 | 6.9 km | — | 10,362–10,406 |
| Saylee Ranch SWD #1 | Saylee Services, LLC | 000105561 | 7.1 km | 20,000 | 5,600–7,000 |
| Powers-Swaim Unit #1R | Atlas Operating LLC | 000112626 | 10 km | 3,000 | 5,650–6,250 |
Disposal in McMullen County → · How disposal permits and volumes work →
About this data
Event tx2021ojit 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/tx2021ojit, documented in the API reference.