M1.2 earthquake near Pico Rivera, California, United States
A magnitude 1.2 earthquake struck near Pico Rivera, California, United States at 02:04 local time (09:04 UTC) on 5 Oct 2026, at a depth of 21 km, according to USGS. The solution is preliminary and may be revised.
revised from M1.4
Data: USGS · updated 2026-10-05 09:08 UTC · automatic solution
- Magnitude
- 1.2micro
local magnitude (Richter) (ml)
revised from 1.4 - Depth
- 20.8 km
- Status
- Automatic
- Origin time
- 2026-10-05 09:04:57 UTC
- Local: 5 Oct 2026, 02:04:57 (America/Los Angeles)
- Epicentre
- 33.982° N, 118.103° 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 |
|---|---|---|
| Pico RiveraCalifornia, United States · pop. 64,218 | 0 km | INot felt |
| West Whittier-Los NietosCalifornia, United States · pop. 25,540 | 3 km | INot felt |
| MontebelloCalifornia, United States · pop. 63,921 | 3 km | INot felt |
| Bell GardensCalifornia, United States · pop. 43,106 | 4 km | INot felt |
| Los AngelesCalifornia, United States · pop. 3,820,914 | 15 km | INot felt |
| AnaheimCalifornia, United States · pop. 350,742 | 24 km | INot felt |
| Long BeachCalifornia, United States · pop. 474,140 | 25 km | INot felt |
| Santa AnaCalifornia, United States · pop. 310,227 | 34 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 | 1.2 mlwas 1.4 | 20.8 km | 33.98° N, 118.10° W | – | Automatic · 1 revision |
How big was it?
Usually not felt. Recorded by nearby seismometers; thousands occur worldwide every day.
It released roughly the energy of 919 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 21 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.
M1.2 releases about 1.9× the energy of M1.0, and its waves are about 1.5× taller on a seismogram. Energy: 919 g 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
28 later earthquakes within 30 km; the largest was M3.2 34 days ago. 4 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.
Mainshock M1.2
28 later earthquakes nearby. Aftershock rates typically fall off roughly as 1/time (Omori's law).
| Time after mainshock (hours) | Magnitude | Depth (km) |
|---|---|---|
| 9.33 | 0.7 | 13 |
| 74.72 | 1.5 | 11 |
| 94.66 | 3.2 | 12 |
| 207.54 | 0.5 | 11 |
| 222.23 | 1.2 | 10 |
| 331.06 | 0.6 | 13 |
| 346.77 | 1.2 | -1 |
| 348.95 | 0.9 | 7 |
| 385.28 | 1.2 | 7 |
| 423.40 | 0.8 | 11 |
| 472.93 | 1.2 | 12 |
| 499.69 | 1.1 | 8 |
| 516.19 | 1.0 | -1 |
| 546.49 | 1.1 | 11 |
| 547.28 | 1.7 | 11 |
| 549.99 | 0.9 | 11 |
| 554.23 | 0.8 | 11 |
| 556.59 | 0.7 | 10 |
| 557.28 | 0.7 | 11 |
| 557.38 | 0.8 | 10 |
| 558.40 | 1.3 | 11 |
| 587.01 | 0.8 | 9 |
| 601.28 | 1.1 | 11 |
| 621.65 | 0.9 | 13 |
| 626.85 | 0.5 | 7 |
| 636.44 | 1.8 | 12 |
| 662.02 | 1.2 | 12 |
| 712.48 | 1.5 | 11 |
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- 0.73 km SSW of Glendale, California, United States10-28 13:40
- 0.74 km SSW of Glendale, California, United States10-28 14:21
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Reports on SeismoAtlas
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Event id ci41343399. First recorded here 5 Oct 2026, 09:07:58 UTC. Solutions: USGS · CI (usgs:ci41343399). Cite as: SeismoAtlas, “M1.2 earthquake near Pico Rivera, California, United States”, https://seismoatlas.com/earthquake/ci41343399-m1-2-earthquake-near-pico-rivera-california-united-states, data from USGS.
JSON: /api/v1/events/ci41343399. SeismoAtlas is not an official warning service.