QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

Earthquake near Pine Mountain Club, CA

No earthquake was likely felt in Pine Mountain Club in the 24 hours to 2:36 pm PST (22:36 UTC). The last one was M 3.8, 62 km (38 mi) SE, at 8:00 pm PDT on 29 September 2026, estimated intensity II (weak) in town; 199 felt reports to USGS. Every earthquake near Pine Mountain Club

This page: a magnitude 1.7 earthquake was recorded 7 km (5 mi) northwest of Pine Mountain Club, CA, at 6:56 am PST on 31 December 2018 (14:56 UTC), 9.7 km deep.

USGS: 7km NW of Pine Mountain Club, CA

53 km (33 mi) SSW of Bakersfield, CA · 122 km (76 mi) NW of Los Angeles, CA

6:56 am PST, Dec 31, 2018 · · 9.7 km deep · released about 10 lb of TNT

Every earthquake near Pine Mountain Club Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Ventura County 60 kmKern County 66 kmSanta Barbara County 86 kmLos Angeles County 116 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
6:56 am PST on 31 December 2018 ()
Where
7 km (5 mi) northwest of Pine Mountain Club, CA · earthquakes near Pine Mountain Club
Magnitude
M 1.7 (ml)
Depth
9.7 km below the surface
Felt
no reports yet
Nearest
Ventura County, 60 km S
Nearest mapped fault
San Andreas 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 2873 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 7 km (4 mi) from the epicentre. In Pine Mountain Club, 7 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.

Earthquakes near other towns within 30 km: Frazier Park, Maricopa.

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 4.1 on 2016-03-12 — about 4,700 times the energy of this one.

Before 2016, the USGS record lists 18 earthquakes of M5 or more within 50 km; the five largest:

  1. 7.5 The 1952 Kern County, California Earthquake · 20 km ENE of this epicentre
  2. 6.0 Tejon Pass, California · 28 km E of this epicentre
  3. 5.8 13km WNW of Grapevine, CA · 15 km NE of this epicentre
  4. 5.5 Southwest of Tejon Pass, California · 29 km SE of this epicentre
  5. 5.5 13km ENE of Grapevine, CA · 38 km ENE 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 34.8942, -119.2058. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Ventura County, CA 60 km (37 mi) S earthquakes near Ventura County
Kern County, CA 66 km (41 mi) NE earthquakes near Kern County
Santa Barbara County, CA 86 km (53 mi) WSW earthquakes near Santa Barbara County
Los Angeles County, CA 116 km (72 mi) SE earthquakes near Los Angeles County
San Luis Obispo County, CA 126 km (78 mi) WNW earthquakes near San Luis Obispo 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.

  1. 2.4 12km N of Grapevine, CA
  2. 2.1 12km N of Grapevine, CA
  3. 2.1 12km N of Grapevine, CA
  4. 1.9 21km SSW of Frazier Park, CA
  5. 2.1 13km N of Grapevine, CA
  6. 2.0 12km N of Grapevine, CA
  7. 1.9 13km N of Grapevine, CA
  8. 3.4 12km N of Grapevine, CA
  9. 1.8 13km N of Grapevine, CA
  10. 1.9 12km N of Grapevine, CA
  11. 2.2 12km N of Grapevine, CA
  12. 1.8 12km N of Grapevine, CA
  13. 2.8 13km N of Grapevine, CA
  14. 1.9 12km N of Grapevine, CA
  15. 3.4 12km N of Grapevine, 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.