EARTHQUAKES · ECTOR AREA · TX2021TKTI
Magnitude 2.0 9 km SSE of Gardendale, Texas
Monday, October 4, 2021, 1:17:15 AM Central · 2021-10-04 06:17:15 UTC
A magnitude 2.0 earthquake 9 km SSE of Gardendale, Texas on October 4, 2021 at 1:17 AM Central, 7.6 km deep, in the Ector County area.
It is one of 107 M2+ events located within 10 km of this spot, 1 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 1.5 km away and operated by COG Operating LLC; together they hold 166,950 barrels a day of permitted capacity.
16 of the nearby wells report daily to TexNet; they injected 16,770 barrels a day in August 2026.
- M2.0
- ML, reviewed
- 7.6
- km deep · 24,953 ft
- 1
- M2+ within 10 km, prior 30 days
- 107
- M2+ within 10 km, all time
- 15
- active injection wells within 10 km
- 359
- permitted wells within 10 km
Location
- Epicenter
- 31.9418, -102.3315
- County area
- Ector 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 |
|---|---|---|---|
| Sep 26, 2021, 9:09 PM | 2.3 | 3.9 km | 8.2 km |
| Oct 25, 2021, 8:39 PM | 2.1 | 5.3 km | 7.7 km |
| Oct 26, 2021, 4:54 PM | 3.4 | 1.4 km | 8.4 km |
| Oct 26, 2021, 5:03 PM | 3.6 | 1.2 km | 8.4 km |
| Oct 27, 2021, 4:04 PM | 3.2 | 0.3 km | 7.8 km |
| Oct 28, 2021, 6:27 AM | 2.1 | 0.6 km | 7.2 km |
| Nov 21, 2021, 10:54 PM | 2.4 | 5.2 km | 8.4 km |
| Nov 22, 2021, 1:29 AM | 2.0 | 3.9 km | 8.5 km |
| Nov 26, 2021, 11:23 AM | 2.2 | 1.7 km | 6.6 km |
| Dec 2, 2021, 3:51 AM | 2.3 | 1.2 km | 7.3 km |
| Jul 29, 2021, 2:52 PM | 2.3 | 1.9 km | 7.0 km |
| Dec 23, 2021, 7:02 AM | 2.1 | 3.9 km | 8.4 km |
Largest nearby on record: M3.6 on Oct 26, 2021.
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. 16 of these report daily to TexNet: 16.8K bbl/d in Aug 2026.
| Well | Operator | UIC no. | Distance | Permitted, bbl/d | Injection zone, ft |
|---|---|---|---|---|---|
| Ratliff A #3201 | COG Operating LLC | 000101348 | 1.5 km | 15,000 | 5,000–5,600 |
| Parks Bell SWD #4101 | Owl SWD Operating, LLC | 000106396 | 1.8 km | 20,000 | 4,900–5,600 |
| Ratliff Ranch 'A' #5A | Slant Operating, LLC | 000116242 | 4 km | 10,000 | 6,250–7,000 |
| Headlee Devonian Unit #63 | Chevron U. S. A. Inc. | 000039662 | 4.2 km | 5,000 | 5,032–5,376 |
| Ratliff 'F' #1 | Slant Operating, LLC | 000113121 | 4.4 km | 10,000 | 5,290–7,190 |
| Ratliff A #3004SW | COG Operating LLC | 000111129 | 4.5 km | 24,000 | 5,129–6,091 |
| Ratliff, S. W., -A- #13 J | Slant Operating, LLC | 000102703 | 5.2 km | 3,000 | 4,849–5,060 |
| Ratliff A #1903 | COG Operating LLC | 000104207 | 5.8 km | 15,000 | 4,900–5,600 |
| Barrow Wiw #2 | Formentera Operations LLC | 000015177 | 6.8 km | 6,000 | 5,200–5,530 |
| Holifield #1 | Direct Midstream LLC | 000102300 | 6.9 km | 15,000 | 4,000–6,000 |
| Pintail West 30 #1D | Pioneer Natural Res. USA, Inc. | 000126553 | 7.2 km | 30,000 | 4,035–6,490 |
| Whittenburg #2200SW | Permian Resources Operating, LLC | 000101188 | 7.2 km | 10,000 | 5,150–5,550 |
| Gist Unit #62W | Aghorn Operating, Inc. | 000013064 | 7.5 km | 750 | 4,150–4,350 |
| Gist, Etal #9W | Aghorn Operating, Inc. | 000077909 | 7.5 km | 2,000 | 4,354–4,507 |
| Gist Unit #12W | Aghorn Operating, Inc. | 000013051 | 7.5 km | 1,200 | 4,139–4,385 |
Disposal in Ector County → · How disposal permits and volumes work →
About this data
Event tx2021tkti 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/tx2021tkti, documented in the API reference.