Earthquake · reviewed by a seismologist
M 1.5ml
Earthquake near Lake Arrowhead, CA
No earthquake was likely felt in Lake Arrowhead in the 24 hours to 11:43 pm PST (07:43 UTC). The last one was M 2.0, 11 km (7 mi) SSW, at 3:40 pm PDT on 22 September 2026, estimated intensity II (weak) in town; 14 felt reports to USGS. Every earthquake near Lake Arrowhead
This page: a magnitude 1.5 earthquake was recorded in Lake Arrowhead, CA, at 8:25 am PDT on 19 July 2016 (15:25 UTC), 6.3 km deep.
USGS: 2km NNE of Lake Arrowhead, CA
17 km (10 mi) N of Highland, CA · 116 km (72 mi) ENE of Los Angeles, CA
- When
- 8:25 am PDT on 19 July 2016 ()
- Where
- in Lake Arrowhead, CA · earthquakes near Lake Arrowhead
- Magnitude
- M 1.5 (ml)
- Depth
- 6.3 km below the surface
- Felt
- no reports yet
- Nearest
- Orange County, 85 km SW
- Nearest mapped fault
- Cleghorn fault, 5 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 3767 days ago
Earthquake alerts for Lake Arrowhead, CA
Get a notification in this browser when USGS records an earthquake near Lake Arrowhead, 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 8 km (5 mi) from the epicentre. 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: Lake Arrowhead in town, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 5.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 2,700,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
- Around the size people start to feel M 3.0 170× the energy of this one
- This earthquake M 1.5 about 5.6 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 4.4 on 2016-01-06 — about 21,000 times the energy of this one.
Before 2016, the USGS record lists 14 earthquakes of M5 or more within 50 km; the five largest:
- 6.3 The 1992 Big Bear, California Earthquake · 33 km ESE of this epicentre
- 6.2 3 km SE of San Bernardino, California · 21 km SSW of this epicentre
- 5.6 7km ENE of Running Springs, CA · 13 km E of this epicentre
- 5.5 The 1990 Upland, California Earthquake · 49 km WSW of this epicentre
- 5.5 11km SSE of Big Bear Lake, California · 32 km ESE 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 34.2618, -117.1797. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Orange County, CA | 85 km (53 mi) | SW | earthquakes near Orange County |
| Los Angeles County, CA | 100 km (62 mi) | W | earthquakes near Los Angeles County |
| San Bernardino County, CA | 113 km (70 mi) | NE | earthquakes near San Bernardino County |
| Riverside County, CA | 124 km (77 mi) | ESE | earthquakes near Riverside County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
46 earthquakes have been recorded within 50 km since this one.
- 3.1 13km WNW of Morongo Valley, CA
- 1.5 3km ENE of Banning, CA
- 1.5 8km SSW of Lytle Creek, CA
- 1.8 2km SW of Mira Loma, CA
- 2.0 7km SSW of Devore, CA
- 1.7 7km SSW of Devore, CA
- 1.6 2km SSE of Loma Linda, CA
- 1.7 10km NNW of Banning, CA
- 2.4 2km NE of Colton, CA
- 1.8 5km NW of Big Bear City, CA
- 1.7 10km E of Lucerne Valley, CA
- 1.6 12km SSE of Big Bear City, CA
- 1.6 4km NNW of Glen Avon, CA
- 1.6 13km W of Morongo Valley, CA
- 1.6 4km N of Big Bear City, 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.