Skip to content
SeismoAtlas

M2.5 earthquake 10 km N of East Foothills, California, United States

A magnitude 2.5 earthquake struck 10 km N of East Foothills, California, United States at 03:52 local time (10:52 UTC) on 19 Sept 2026, at a depth of 3 km, according to USGS. The solution is preliminary and may be revised.

9 reports to USGS “Did You Feel It?”

Data: USGS · updated 2026-09-19 20:58 UTC · automatic solution

Magnitude
2.5micro
duration magnitude (md)
Depth
2.7 km
Status
Automatic
Origin time
2026-09-19 10:52:05 UTC
Local: 19 Sept 2026, 03:52:05 (America/Los Angeles)
Epicentre
37.467° N, 121.802° 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
East FoothillsCalifornia, United States · pop. 8,26910 kmIIWeak
MilpitasCalifornia, United States · pop. 77,60410 kmIIWeak
San JoseCalifornia, United States · pop. 997,36816 kmIIWeak
FremontCalifornia, United States · pop. 232,20619 kmIIWeak
Santa ClaraCalifornia, United States · pop. 126,21519 kmIIWeak
OaklandCalifornia, United States · pop. 419,26755 kmINot felt
San FranciscoCalifornia, United States · pop. 827,52664 kmINot felt
StocktonCalifornia, United States · pop. 305,65871 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. Likely felt out to about 9 km.

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 · NC.

AgencyMagnitudeDepthEpicentreTime offsetStatus
USGS · NCheadlineNorthern California Seismic System via U.S. Geological Survey2.5 md2.7 km37.47° N, 121.80° W–Automatic

Advertisement

How big was it?

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

It released roughly the energy of 85 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 3 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M2.5 releases about 32× the energy of M1.5, and its waves are about 10× taller on a seismogram. Energy: 85 kg of TNT vs 3 kg of TNT.

Each square is the energy of one M1.5. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

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

Aftershocks

Mainshock M2.5

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
61.921.52
69.200.96
127.981.18
132.031.41
153.371.40
154.851.71
178.671.28
182.921.19
197.920.88
209.952.16
  1. 2.110 km NNE of East Foothills, California, United States09-28 04:49
  2. 1.712 km SE of Livermore, California, United States09-25 21:43
  3. 1.58 km ESE of East Foothills, California, United States09-22 00:46
  4. 1.412 km SE of Livermore, California, United States09-24 22:53
  5. 1.412 km SE of Livermore, California, United States09-25 20:14
  6. 1.213 km E of Fremont, California, United States09-26 21:32
  7. 1.113 km E of Fremont, California, United States09-27 01:47
  8. 1.113 km SE of Livermore, California, United States09-24 18:50
  9. 0.919 km NE of East Foothills, California, United States09-22 08:03
  10. 0.810 km ESE of East Foothills, California, United States09-27 16:47

Did you feel it?

Reports from people help show where shaking was strong. They are anonymous and shown here in aggregate.

How strong was the shaking where you were?

Anonymous. No account, no cookies. A short automatic check runs in your browser instead of a third-party captcha.

Reports on SeismoAtlas

No reports yet.

USGS “Did You Feel It?” has 9 reports: add yours at USGS.

Event id nc75438287. First recorded here 28 Sept 2026, 17:32:10 UTC. Solutions: USGS · NC (usgs:nc75438287). Cite as: SeismoAtlas, “M2.5 earthquake 10 km N of East Foothills, California, United States”, https://seismoatlas.com/earthquake/nc75438287-m2-5-earthquake-10-km-n-of-east-foothills-california-united-states, data from USGS.

JSON: /api/v1/events/nc75438287. SeismoAtlas is not an official warning service.