QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

Earthquake near Lone Pine, CA

No earthquake was likely felt in Lone Pine in the 24 hours to 6:55 am PST (14:55 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 1.7 earthquake was recorded 47 km (29 mi) south-southeast of Lone Pine, CA, at 2:35 pm PDT on 17 October 2021 (21:35 UTC), 4.9 km deep.

USGS: 15km ESE of Olancha, CA

2:35 pm PDT, Oct 17, 2021 · · 4.9 km deep · released about 10 lb of TNT

Every earthquake near Lone Pine Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Inyo County 56 kmTulare County 82 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
2:35 pm PDT on 17 October 2021 ()
Where
47 km (29 mi) south-southeast of Lone Pine, CA · earthquakes near Lone Pine
Magnitude
M 1.7 (ml)
Depth
4.9 km below the surface
Felt
no reports yet
Nearest
Inyo County, 56 km NE
Nearest mapped fault
Owens Valley fault, 15 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 1851 days ago

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 11 km (7 mi) from the epicentre. In Lone Pine, 47 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 10 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 95× the energy of this one
  4. This earthquake M 1.7 about 10 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 1,500,000 times the energy of this one.

Before 2016, the USGS record lists 8 earthquakes of M5 or more within 50 km; the five largest:

  1. 5.3 27km E of Coso Junction, California · 25 km SE of this epicentre
  2. 5.2 15km NNE of Inyokern, CA · 49 km S of this epicentre
  3. 5.2 28km E of Coso Junction, California · 26 km SE of this epicentre
  4. 5.2 7km ESE of Coso Junction, CA · 22 km S of this epicentre
  5. 5.2 18km NE of Olancha, CA · 19 km N 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 36.2162, -117.8635. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Inyo County, CA 56 km (35 mi) NE earthquakes near Inyo County
Tulare County, CA 82 km (51 mi) W earthquakes near Tulare County
Kern County, CA 124 km (77 mi) SW earthquakes near Kern County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

57 earthquakes have been recorded within 50 km since this one.

  1. 1.9 20km ESE of Little Lake, CA
  2. 2.1 17km SE of Lone Pine, CA
  3. 1.7 18km SE of Lone Pine, CA
  4. 1.8 9km NE of Coso Junction, CA
  5. 2.5 12km S of Olancha, CA
  6. 1.8 5km WNW of Coso Junction, CA
  7. 1.5 14km ESE of Little Lake, CA
  8. 1.6 10km NE of Coso Junction, CA
  9. 1.7 13km ESE of Olancha, CA
  10. 1.6 21km E of Little Lake, CA
  11. 2.5 20km ESE of Little Lake, CA
  12. 2.8 24km N of Ridgecrest, CA
  13. 2.1 20km ESE of Little Lake, CA
  14. 2.2 17km SE of Lone Pine, CA
  15. 2.3 11km 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

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.