M1.0 earthquake 8 km SSE of Santa Clarita, California, United States
A magnitude 1.0 earthquake struck 8 km SSE of Santa Clarita, California, United States at 23:50 local time (06:50 UTC) on 28 Oct 2026, at a depth of 11 km, according to USGS. The solution is preliminary and may be revised.
Data: USGS · updated 2026-10-29 06:53 UTC · automatic solution
- Magnitude
- 1.0micro
local magnitude (Richter) (ml) - Depth
- 11.1 km
- Status
- Automatic
- Origin time
- 2026-10-29 06:50:29 UTC
- Local: 28 Oct 2026, 23:50:29 (America/Los Angeles)
- Epicentre
- 34.323° N, 118.497° 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
| Place | Distance | Est. shaking |
|---|---|---|
| Santa ClaritaCalifornia, United States · pop. 182,371 | 8 km | INot felt |
| Stevenson RanchCalifornia, United States · pop. 17,557 | 10 km | INot felt |
| ValenciaCalifornia, United States · pop. 148,456 | 17 km | INot felt |
| BurbankCalifornia, United States · pop. 105,319 | 23 km | INot felt |
| Simi ValleyCalifornia, United States · pop. 126,788 | 27 km | INot felt |
| Los AngelesCalifornia, United States · pop. 3,820,914 | 38 km | INot felt |
| Long BeachCalifornia, United States · pop. 474,140 | 68 km | INot felt |
| AnaheimCalifornia, United States · pop. 350,742 | 76 km | INot 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 · CI.
| Agency | Magnitude | Depth | Epicentre | Time offset | Status |
|---|---|---|---|---|---|
| USGS · CIheadlineSouthern California Seismic Network via U.S. Geological Survey | 1.0 ml | 11.1 km | 34.32° N, 118.50° W | – | Automatic |
How big was it?
Usually not felt. Recorded by nearby seismometers; thousands occur worldwide every day.
It released roughly the energy of 445 g 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 11 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.
M1.0 releases about 1.1× the energy of M1.0, and its waves are about 1× taller on a seismogram. Energy: 477 g of TNT vs 445 g of TNT.
Each square is the energy of one M1.0. Energy from log₁₀E = 1.5M + 4.8.
Aftershocks and nearby activity
9 later earthquakes within 30 km; the largest was M2.3 5 days ago. 3 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.
Mainshock M1.0
9 later earthquakes nearby. Aftershock rates typically fall off roughly as 1/time (Omori's law).
| Time after mainshock (hours) | Magnitude | Depth (km) |
|---|---|---|
| 56.60 | 0.9 | 11 |
| 75.30 | 1.8 | 17 |
| 218.90 | 1.1 | 16 |
| 221.79 | 1.4 | 2 |
| 226.92 | 2.3 | 3 |
| 232.00 | 1.4 | 5 |
| 259.53 | 1.5 | 5 |
| 274.85 | 1.1 | 6 |
| 283.26 | 1.7 | 11 |
- 2.316 km S of Stevenson Ranch, California, United States11-07 17:45
- 1.817 km S of Stevenson Ranch, California, United States11-01 10:08
- 1.714 km SSE of Santa Clarita, California, United States11-10 02:06
- 1.516 km ENE of Oak Park, California, United States11-09 02:22
- 1.415 km E of Simi Valley, California, United States11-07 22:50
- 1.416 km S of Stevenson Ranch, California, United States11-07 12:37
- 1.16 km WSW of Burbank, California, United States11-07 09:44
- 1.114 km E of Simi Valley, California, United States11-09 17:41
- 0.99 km WSW of Stevenson Ranch, California, United States10-31 15:26
Did you feel it?
Reports from people help show where shaking was strong. They are anonymous and shown here in aggregate.
Reports close 14 days after an earthquake.
Reports on SeismoAtlas
No reports yet.
Event id ci41568680. First recorded here 29 Oct 2026, 06:54:42 UTC. Solutions: USGS · CI (usgs:ci41568680). Cite as: SeismoAtlas, “M1.0 earthquake 8 km SSE of Santa Clarita, California, United States”, https://seismoatlas.com/earthquake/ci41568680-m1-0-earthquake-8-km-sse-of-santa-clarita-california-united-states, data from USGS.
JSON: /api/v1/events/ci41568680. SeismoAtlas is not an official warning service.