Earthquake · reviewed by a seismologist
M 1.9ml
Earthquake near Lennox, CA
No earthquake was likely felt in Lennox in the 24 hours to 4:47 am PST (12:47 UTC). The last one was M 1.6, 7 km (4 mi) N, at 5:53 pm PST on 10 November 2026, estimated intensity II (weak) in town. Every earthquake near Lennox
This page: a magnitude 1.9 earthquake was recorded in Lennox, CA, at 12:36 pm PDT on 27 April 2021 (19:36 UTC), 21 km deep.
USGS: 0km SW of Lennox, CA
11 km (7 mi) SSE of Los Angeles, CA · in Inglewood, CA
- When
- 12:36 pm PDT on 27 April 2021 ()
- Where
- in Lennox, CA · earthquakes near Lennox
- Magnitude
- M 1.9 (ml)
- Depth
- 21 km below the surface
- Felt
- no reports yet
- Nearest
- Los Angeles County, 30 km NNE
- Nearest mapped fault
- Newport-Inglewood-Rose Canyon fault, 3 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 2023 days ago
Earthquake alerts for Lennox, CA
Get a notification in this browser when USGS records an earthquake near Lennox, 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 it was probably too small to be felt, even directly above it. 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.
Earthquakes near other towns within 30 km: Hawthorne, Del Aire, Inglewood, Westmont, West Athens, Lawndale.
How big was it?
This earthquake released about 24 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 640,000× the energy of this one
- Magna, Utah 2020 M 5.7 450,000× the energy of this one
- Around the size people start to feel M 3.0 40× the energy of this one
- This earthquake M 1.9 about 24 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 8,200 times the energy of this one.
Before 2016, the USGS record lists 17 earthquakes of M5 or more within 50 km; the five largest:
- 6.7 Northridge, California, earthquake · 35 km NNW of this epicentre
- 6.4 The 1933 Long Beach, California Earthquake · 47 km SE of this epicentre
- 5.9 The 1987 Whittier Narrows, California Earthquake · 29 km ENE of this epicentre
- 5.9 1km ENE of Granada Hills, California · 40 km NNW of this epicentre
- 5.8 The 1991 Sierra Madre, California Earthquake · 50 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 33.9368, -118.3545. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Los Angeles County, CA | 30 km (19 mi) | NNE | earthquakes near Los Angeles County |
| Orange County, CA | 61 km (38 mi) | ESE | earthquakes near Orange County |
| Ventura County, CA | 86 km (53 mi) | WNW | earthquakes near Ventura County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
59 earthquakes have been recorded within 50 km since this one.
- 2.8 5km SSE of Malibu Beach, CA
- 1.6 4km NE of Whittier, CA
- 1.7 2km NNW of Inglewood, CA
- 1.9 1km SSW of Malibu, CA
- 1.8 4km NW of Silver Lake, CA
- 1.8 3km SSE of Garden Grove, CA
- 1.8 1km NNW of La Puente, CA
- 2.0 13km SSE of Malibu Beach, CA
- 1.5 2km WSW of Costa Mesa, CA
- 1.9 10km SSW of Rancho Palos Verdes, CA
- 2.1 0km W of Brea, CA
- 1.6 1km NNW of South Gate, CA
- 1.6 22km SSW of Seal Beach, CA
- 1.9 3km WSW of Compton, CA
- 1.6 6km S of Malibu Beach, 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.