Earthquake · reviewed by a seismologist
M 1.6ml
Earthquake near Alta Sierra, CA
No earthquake was likely felt in Alta Sierra in the 24 hours to 5:18 am PST (13:18 UTC). The last one was M 3.1, 14 km (9 mi) ESE, at 2:37 am PDT on 6 October 2026, estimated intensity III (weak) in town; 30 felt reports to USGS. Every earthquake near Alta Sierra
This page: a magnitude 1.6 earthquake was recorded 49 km (30 mi) north-northeast of Alta Sierra, CA, at 4:43 pm PDT on 25 June 2019 (23:43 UTC), 4.8 km deep.
USGS: 36km WSW of Olancha, CA
- When
- 4:43 pm PDT on 25 June 2019 ()
- Where
- 49 km (30 mi) north-northeast of Alta Sierra, CA · earthquakes near Alta Sierra
- Magnitude
- M 1.6 (ml)
- Depth
- 4.8 km below the surface
- Felt
- no reports yet
- Nearest
- Tulare County, 38 km WNW
- Nearest mapped fault
- Kern Canyon fault, 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 2690 days ago
Earthquake alerts for Alta Sierra, CA
Get a notification in this browser when USGS records an earthquake near Alta Sierra, 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 10 km (6 mi) from the epicentre. In Alta Sierra, 49 km away, the estimate is intensity I (not felt). 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.
How big was it?
This earthquake released about 8.1 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 1,900,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,300,000× the energy of this one
- Around the size people start to feel M 3.0 120× the energy of this one
- This earthquake M 1.6 about 8.1 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
No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.
Before 2016, the USGS record lists 2 earthquakes of M5 or more within 50 km:
- 5.2 7km ESE of Coso Junction, CA · 47 km ESE of this epicentre
- 5.0 5 km S of Springville, California · 42 km W 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 36.1455, -118.3697. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Tulare County, CA | 38 km (24 mi) | WNW | earthquakes near Tulare County |
| Kern County, CA | 95 km (59 mi) | SSW | earthquakes near Kern County |
| Inyo County, CA | 98 km (61 mi) | ENE | earthquakes near Inyo County |
| Fresno County, CA | 134 km (83 mi) | WNW | earthquakes near Fresno County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
55 earthquakes have been recorded within 50 km since this one.
- 2.9 10km NE of Coso Junction, CA
- 1.8 9km E of Coso Junction, CA
- 2.4 8km E of Coso Junction, CA
- 1.8 10km NE of Coso Junction, CA
- 1.5 10km NE of Coso Junction, CA
- 2.0 7km NNE of Coso Junction, CA
- 2.1 10km NE of Coso Junction, CA
- 1.8 12km ENE of Coso Junction, CA
- 2.2 10km NE of Coso Junction, CA
- 2.3 10km NE of Coso Junction, CA
- 2.0 10km NE of Coso Junction, CA
- 2.1 10km NNE of Coso Junction, CA
- 1.9 10km NE of Coso Junction, CA
- 2.1 8km NNE of Coso Junction, CA
- 2.5 10km NE of Coso Junction, 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.