Earthquake · reviewed by a seismologist
M 1.6ml
Earthquake near Anaheim, CA
No earthquake was likely felt in Anaheim in the 24 hours to 6:01 am PST (14:01 UTC). The last one was M 3.2, 26 km (16 mi) WSW, at 12:44 am PDT on 9 October 2026, estimated intensity II (weak) in town; 1,090 felt reports to USGS. Every earthquake near Anaheim
This page: a magnitude 1.6 earthquake was recorded 4 km (3 mi) east-southeast of Anaheim, CA, at 12:14 pm PDT on 30 October 2021 (19:14 UTC), 6.4 km deep.
USGS: 2km ESE of Anaheim, CA
in Orange, CA · 54 km (34 mi) ESE of Los Angeles, CA
- When
- 12:14 pm PDT on 30 October 2021 ()
- Where
- 4 km (3 mi) east-southeast of Anaheim, CA · earthquakes near Anaheim
- Magnitude
- M 1.6 (ml)
- Depth
- 6.4 km below the surface
- Felt
- no reports yet
- Nearest
- Orange County, 19 km SSE
- Nearest mapped fault
- Puente Hills blind thrust system, 6 km from its surface trace — near is not the same as on
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1837 days ago
Earthquake alerts for Anaheim, CA
Get a notification in this browser when USGS records an earthquake near Anaheim, CA. No account or email needed.
Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth, people at rest would likely notice it out to about 9 km (6 mi) from the epicentre. In Anaheim, 4 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.
Likely felt in: Anaheim 4 km, intensity II · Orange 5 km, intensity II · Placentia 5 km, intensity II · Fullerton 7 km, intensity II · Yorba Linda 9 km, intensity II · Garden Grove 9 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 6.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 2,300,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,600,000× the energy of this one
- Around the size people start to feel M 3.0 140× the energy of this one
- This earthquake M 1.6 about 6.6 lb of TNT
Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.
For this area
The largest earthquake within 50 km since 2016 was M 4.5 on 2020-09-19 — about 30,000 times the energy of this one.
Before 2016, the USGS record lists 15 earthquakes of M5 or more within 50 km; the five largest:
- 6.4 The 1933 Long Beach, California Earthquake · 25 km SSW of this epicentre
- 6.0 The 1910 Lake Elsinore, California Earthquake · 46 km ESE of this epicentre
- 5.9 The 1987 Whittier Narrows, California Earthquake · 32 km NW of this epicentre
- 5.5 The 1990 Upland, California Earthquake · 39 km NNE of this epicentre
- 5.4 5km S of Chino Hills, CA · 17 km NE of this epicentre
Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.
Where
Epicentre 33.8265, -117.8698. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Orange County, CA | 19 km (12 mi) | SSE | earthquakes near Orange County |
| Los Angeles County, CA | 55 km (34 mi) | NW | earthquakes near Los Angeles County |
| Ventura County, CA | 131 km (81 mi) | WNW | earthquakes near Ventura County |
| San Diego County, CA | 135 km (84 mi) | SE | earthquakes near San Diego County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
49 earthquakes have been recorded within 50 km since this one.
- 1.7 7km SSE of Home Gardens, CA
- 1.6 3km ENE of La Mirada, CA
- 1.5 1km E of View Park-Windsor Hills, CA
- 1.6 2km W of Inglewood, CA
- 1.6 1km ENE of Carson, CA
- 2.0 22km SW of Huntington Beach, CA
- 2.3 3km ESE of Carson, CA
- 2.0 4km SE of Home Gardens, CA
- 1.5 2km ESE of Carson, CA
- 1.9 3km ESE of Carson, CA
- 2.5 3km SE of Carson, CA
- 1.5 2km SE of Carson, CA
- 1.8 4km ESE of Carson, CA
- 1.5 0km SE of Carson, CA
- 2.8 3km SSE of Carson, CA
Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.
On USGS
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.