M0.4 earthquake 19 km NNE of San Diego Country Estates, California, United States

A magnitude 0.4 earthquake struck 19 km NNE of San Diego Country Estates, California, United States at 02:45 local time (10:45 UTC) on 6 Nov 2026, at a depth of 11 km, according to USGS.

Data: USGS · updated 2026-11-06 22:35 UTC · reviewed

Magnitude: 0.4micro
local magnitude (Richter) (ml)
Depth: 11.5 km
Status: Reviewed
Origin time: 2026-11-06 10:45:17 UTC; Local: 6 Nov 2026, 02:45:17 (America/Los Angeles)
Epicentre: 33.180° N, 116.730° 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
Place	Distance	Est. shaking
San Diego Country EstatesCalifornia, United States · pop. 10,109	19 km	INot felt
RamonaCalifornia, United States · pop. 20,292	20 km	INot felt
EscondidoCalifornia, United States · pop. 151,038	34 km	INot felt
PowayCalifornia, United States · pop. 50,157	38 km	INot felt
LakesideCalifornia, United States · pop. 20,648	40 km	INot felt
San DiegoCalifornia, United States · pop. 1,404,452	65 km	INot felt
Chula VistaCalifornia, United States · pop. 265,757	68 km	INot felt
TijuanaBaja California, Mexico · pop. 1,922,523	80 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, which has been reviewed by an analyst.

Agency	Magnitude	Depth	Epicentre	Time offset	Status
USGS · CIheadlineSouthern California Seismic Network via U.S. Geological Survey	0.4 mlwas 0.5	11.5 km	33.18° N, 116.73° W	–	Reviewed · 1 revision

How big was it?

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

It released roughly the energy of 67 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.

Compare M0.4 with M1.0

M1.0 releases about 7.2× the energy of M0.4, and its waves are about 3.7× taller on a seismogram. Energy: 477 g of TNT vs 67 g of TNT.

Each square is the energy of one M0.4. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

21 later earthquakes within 30 km; the largest was M1.5 16 h ago. 8 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M0.4

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

Aftershocks
Time after mainshock (hours)	Magnitude	Depth (km)
0.35	1.3	7
1.13	0.3	7
5.02	0.6	6
7.19	0.4	7
35.28	0.2	7
39.95	1.3	9
44.55	0.9	10
45.07	0.8	9
46.54	1.0	9
60.11	0.5	10
81.18	0.8	13
86.78	0.4	11
103.09	1.0	11
104.56	0.4	11
106.63	1.3	17
112.50	0.7	10
132.01	1.4	2
139.62	0.4	12
140.27	0.7	12
140.78	1.5	6
140.97	0.6	17

Did you feel it?

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

Reports on SeismoAtlas

No reports yet.

Event id ci41359175. First recorded here 6 Nov 2026, 10:50:21 UTC. Solutions: USGS · CI (usgs:ci41359175). Cite as: SeismoAtlas, “M0.4 earthquake 19 km NNE of San Diego Country Estates, California, United States”, https://seismoatlas.com/earthquake/ci41359175-m0-4-earthquake-19-km-nne-of-san-diego-country-estates-california-united-states, data from USGS.

JSON: /api/v1/events/ci41359175. SeismoAtlas is not an official warning service.