Earthquake · reviewed by a seismologist
M 2.5ml
Earthquake near Lone Pine, CA
No earthquake was likely felt in Lone Pine in the 24 hours to 8:01 am PST (16:01 UTC). The last one was M 2.2, 16 km (10 mi) SE, at 9:24 pm PDT on 29 October 2026, estimated intensity II (weak) in town. Every earthquake near Lone Pine
This page: a magnitude 2.5 earthquake was recorded 50 km (31 mi) south of Lone Pine, CA, at 5:24 pm PST on 20 February 2021 (01:24 UTC), 2.4 km deep.
USGS: 15km SSW of Olancha, CA
- When
- 5:24 pm PST on 20 February 2021 ()
- Where
- 50 km (31 mi) south of Lone Pine, CA · earthquakes near Lone Pine
- Magnitude
- M 2.5 (ml)
- Depth
- 2.4 km below the surface
- Felt
- no reports yet
- Nearest
- Tulare County, 64 km W
- Nearest mapped fault
- Southern Sierra Nevada fault, 10 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 2018 days ago
Earthquake alerts for Lone Pine, CA
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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 small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.
At this magnitude and depth, people at rest would likely notice it out to about 22 km (14 mi) from the epicentre. In Lone Pine, 50 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.
How big was it?
This earthquake released about 170 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 89,000× the energy of this one
- Magna, Utah 2020 M 5.7 63,000× the energy of this one
- Around the size people start to feel M 3.0 5.6× the energy of this one
- This earthquake M 2.5 about 170 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 5.8 on 2020-06-24 — about 89,000 times the energy of this one.
Before 2016, the USGS record lists 10 earthquakes of M5 or more within 50 km; the five largest:
- 5.4 14km NW of Inyokern, CA · 50 km SSE of this epicentre
- 5.3 27km E of Coso Junction, California · 39 km ESE of this epicentre
- 5.2 15km NNE of Inyokern, CA · 50 km SSE of this epicentre
- 5.2 28km E of Coso Junction, California · 40 km ESE of this epicentre
- 5.2 7km ESE of Coso Junction, CA · 24 km SE 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 36.1588, -118.0698. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Tulare County, CA | 64 km (40 mi) | W | earthquakes near Tulare County |
| Inyo County, CA | 75 km (46 mi) | NE | earthquakes near Inyo County |
| Kern County, CA | 108 km (67 mi) | SSW | earthquakes near Kern County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
56 earthquakes have been recorded within 50 km since this one.
- 2.9 21km SSW of Little Lake, CA
- 1.7 23km ESE of Little Lake, CA
- 3.0 14km SSW of Olancha, CA
- 1.8 7km ESE of Lone Pine, CA
- 1.7 20km ESE of Little Lake, CA
- 1.9 18km ESE of Lone Pine, CA
- 2.0 6km ESE of Lone Pine, CA
- 1.7 17km SSE of Lone Pine, CA
- 1.5 20km E of Little Lake, CA
- 1.8 6km ESE of Lone Pine, CA
- 1.6 15km SSW of Olancha, CA
- 1.6 5km NNE of Coso Junction, CA
- 1.8 23km E of Little Lake, CA
- 1.5 6km ESE of Lone Pine, CA
- 1.9 20km SW of Olancha, 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.