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M1.7 earthquake 12 km ESE of Pearsall, Texas, United States

A magnitude 1.7 earthquake struck 12 km ESE of Pearsall, Texas, United States at 00:18 local time (05:18 UTC) on 24 Sept 2026, at a depth of 7 km, according to USGS.

Data: USGS · updated 2026-09-24 07:33 UTC · reviewed

Magnitude
1.7micro
local magnitude (Richter) (ml)
Depth
7.4 km
Status
Reviewed
Origin time
2026-09-24 05:18:15 UTC
Local: 24 Sept 2026, 00:18:15 (America/Chicago)
Epicentre
28.859° N, 98.985° W

Circles show this event and others within 30 km from 7 days before to 30 days after. Lines: plate boundaries and GEM active faults. Open on the live map

Nearby places

Distance and estimated shaking at nearby places
PlaceDistanceEst. shaking
PearsallTexas, United States · pop. 9,98012 kmINot felt
PleasantonTexas, United States · pop. 9,82951 kmINot felt
San AntonioTexas, United States · pop. 1,526,65679 kmINot felt
ConverseTexas, United States · pop. 21,98798 kmINot felt
SchertzTexas, United States · pop. 43,091104 kmINot felt
CiboloTexas, United States · pop. 33,433107 kmINot felt
LaredoTexas, United States · pop. 256,153159 kmINot felt
Nuevo LaredoTamaulipas, Mexico · pop. 416,055162 kmINot felt

Shaking is an estimate from the intensity prediction equation of Allen, Wald & Worden (2012), not an observation. Local ground and buildings can change it by a level or more.

Every agency's solution

Agencies locate earthquakes with their own stations and methods, so their numbers differ. We match reports of the same event by time, distance and magnitude and show them side by side. The headline uses USGS · TX, which has been reviewed by an analyst.

AgencyMagnitudeDepthEpicentreTime offsetStatus
USGS · TXheadlineTexNet via U.S. Geological Survey1.7 ml7.4 km28.86° N, 98.98° W–Reviewed

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How big was it?

Usually not felt. Recorded by nearby seismometers; thousands occur worldwide every day.

It released roughly the energy of 5 kg of TNT. Magnitude is logarithmic: each whole step means about 32 times more energy and 10 times larger waves on a seismogram. Depth matters too: at 7 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M1.7 releases about 11× the energy of M1.0, and its waves are about 5× taller on a seismogram. Energy: 5 kg of TNT vs 477 g of TNT.

Each square is the energy of one M1.0. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

35 later earthquakes within 30 km; the largest was M2.8 2 days ago. 19 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M1.7

35 later earthquakes nearby. Aftershock rates typically fall off roughly as 1/time (Omori's law).

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
0.301.69
0.631.68
0.881.78
1.701.98
2.171.57
2.311.68
5.272.09
6.041.79
6.901.78
9.861.98
11.832.59
14.951.98
17.102.27
18.872.34
19.031.97
23.351.46
23.891.77
24.402.27
24.431.98
25.501.98
25.581.66
26.091.67
28.251.89
29.191.97
29.581.77
30.141.87
34.681.88
48.411.69
48.781.78
50.031.97
63.332.77
63.522.86
64.451.79
76.322.28
79.141.68
  1. 2.822 km ESE of Pearsall, Texas, United States09-26 20:49
  2. 2.717 km ESE of Pearsall, Texas, United States09-26 20:37
  3. 2.517 km ESE of Pearsall, Texas, United States09-24 17:07
  4. 2.310 km SSE of Pearsall, Texas, United States09-25 00:10
  5. 2.212 km ESE of Pearsall, Texas, United States09-24 22:24
  6. 2.218 km ESE of Pearsall, Texas, United States09-25 05:42
  7. 2.219 km ESE of Pearsall, Texas, United States09-27 09:37
  8. 2.014 km E of Pearsall, Texas, United States09-24 10:34
  9. 1.918 km ESE of Pearsall, Texas, United States09-24 07:00
  10. 1.917 km ESE of Pearsall, Texas, United States09-24 15:09
  11. 1.912 km ESE of Pearsall, Texas, United States09-24 20:15
  12. 1.913 km ESE of Pearsall, Texas, United States09-25 00:19
  13. 1.918 km ESE of Pearsall, Texas, United States09-25 05:44
  14. 1.912 km ESE of Pearsall, Texas, United States09-25 06:48
  15. 1.912 km ESE of Pearsall, Texas, United States09-25 10:29
  16. 1.918 km ESE of Pearsall, Texas, United States09-26 07:20
  17. 1.817 km ESE of Pearsall, Texas, United States09-25 09:33
  18. 1.812 km ESE of Pearsall, Texas, United States09-25 11:26
  19. 1.816 km E of Pearsall, Texas, United States09-25 15:59
  20. 1.717 km ESE of Pearsall, Texas, United States09-24 06:11
  21. 1.717 km ESE of Pearsall, Texas, United States09-24 11:20
  22. 1.718 km ESE of Pearsall, Texas, United States09-24 12:12
  23. 1.713 km E of Pearsall, Texas, United States09-25 05:11
  24. 1.712 km ESE of Pearsall, Texas, United States09-25 10:53
  25. 1.717 km ESE of Pearsall, Texas, United States09-26 06:04

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Event id tx2026surrxe. First recorded here 28 Sept 2026, 17:32:11 UTC. Solutions: USGS · TX (usgs:tx2026surrxe). Cite as: SeismoAtlas, “M1.7 earthquake 12 km ESE of Pearsall, Texas, United States”, https://seismoatlas.com/earthquake/tx2026surrxe-m1-7-earthquake-12-km-ese-of-pearsall-texas-united-states, data from USGS.

JSON: /api/v1/events/tx2026surrxe. SeismoAtlas is not an official warning service.