EARTHQUAKES · ECTOR AREA · TX2021VADO
Magnitude 3.6 9 km NNE of Odessa, Texas
Tuesday, October 26, 2021, 5:03:00 PM Central · 2021-10-26 22:03:00 UTC
A magnitude 3.6 earthquake 9 km NNE of Odessa, Texas on October 26, 2021 at 5:03 PM Central, 8.4 km deep, in the Ector County area.
It is one of 108 M2+ events located within 10 km of this spot, 4 of them in the thirty days before it; this is the largest of them.
15 active injection or disposal wells sit within 10 km, the nearest 2.7 km away and operated by COG Operating LLC; together they hold 108,650 barrels a day of permitted capacity.
16 of the nearby wells report daily to TexNet; they injected 37,590 barrels a day in August 2026.
- M3.6
- ML, reviewed
- 8.4
- km deep · 27,521 ft
- 4
- M2+ within 10 km, prior 30 days
- 108
- M2+ within 10 km, all time
- 15
- active injection wells within 10 km
- 359
- permitted wells within 10 km
Location
- Epicenter
- 31.9308, -102.3336
- 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 |
|---|---|---|---|
| Oct 26, 2021, 4:54 PM | 3.4 | 0.3 km | 8.4 km |
| Oct 25, 2021, 8:39 PM | 2.1 | 6.5 km | 7.7 km |
| Oct 27, 2021, 4:04 PM | 3.2 | 1.4 km | 7.8 km |
| Oct 28, 2021, 6:27 AM | 2.1 | 1.7 km | 7.2 km |
| Oct 4, 2021, 1:17 AM | 2.0 | 1.2 km | 7.6 km |
| Nov 21, 2021, 10:54 PM | 2.4 | 6.4 km | 8.4 km |
| Nov 22, 2021, 1:29 AM | 2.0 | 5.1 km | 8.5 km |
| Sep 26, 2021, 9:09 PM | 2.3 | 5.1 km | 8.2 km |
| Nov 26, 2021, 11:23 AM | 2.2 | 1.4 km | 6.6 km |
| Dec 2, 2021, 3:51 AM | 2.3 | 1.4 km | 7.3 km |
| Dec 23, 2021, 7:02 AM | 2.1 | 5.1 km | 8.4 km |
| Dec 27, 2021, 1:29 AM | 2.4 | 5.3 km | 8.6 km |
Largest nearby on record: M3.5 on Jul 22, 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. 16 of these report daily to TexNet: 37.6K bbl/d in Aug 2026.
| Well | Operator | UIC no. | Distance | Permitted, bbl/d | Injection zone, ft |
|---|---|---|---|---|---|
| Ratliff A #3201 | COG Operating LLC | 000101348 | 2.7 km | 15,000 | 5,000–5,600 |
| Parks Bell SWD #4101 | Owl SWD Operating, LLC | 000106396 | 2.9 km | 20,000 | 4,900–5,600 |
| Headlee Devonian Unit #63 | Chevron U. S. A. Inc. | 000039662 | 3.2 km | 5,000 | 5,032–5,376 |
| Ratliff Ranch 'A' #5A | Slant Operating, LLC | 000116242 | 4.8 km | 10,000 | 6,250–7,000 |
| Ratliff 'F' #1 | Slant Operating, LLC | 000113121 | 5.1 km | 10,000 | 5,290–7,190 |
| Ratliff A #3004SW | COG Operating LLC | 000111129 | 5.5 km | 24,000 | 5,129–6,091 |
| Ratliff, S. W., -A- #13 J | Slant Operating, LLC | 000102703 | 6 km | 3,000 | 4,849–5,060 |
| Gist -C- #515W | Aghorn Operating, Inc. | 000046183 | 6.7 km | 1,000 | 4,456–4,570 |
| Gist, Etal #9W | Aghorn Operating, Inc. | 000077909 | 6.7 km | 2,000 | 4,354–4,507 |
| Gist -C- #511W | Aghorn Operating, Inc. | 000043176 | 6.8 km | 600 | 4,240–4,516 |
| Gist Unit #12W | Aghorn Operating, Inc. | 000013051 | 6.8 km | 1,200 | 4,139–4,385 |
| Ratliff A #1903 | COG Operating LLC | 000104207 | 6.8 km | 15,000 | 4,900–5,600 |
| Gist Unit #62W | Aghorn Operating, Inc. | 000013064 | 6.9 km | 750 | 4,150–4,350 |
| Gist -B- #512W | Aghorn Operating, Inc. | 000013098 | 6.9 km | 600 | 4,240–4,640 |
| Gist, Etal #3W | Aghorn Operating, Inc. | 000013037 | 6.9 km | 500 | 4,254–4,400 |
Disposal in Ector County → · How disposal permits and volumes work →
About this data
Event tx2021vado 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/tx2021vado, documented in the API reference.