QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

Earthquake near Buttonwillow, CA

No earthquake was likely felt in Buttonwillow in the 24 hours to 8:04 am PST (16:04 UTC). The last one was M 4.1, 82 km (51 mi) SE, at 3:38 am PDT on 12 July 2026, estimated intensity II (weak) in town; 798 felt reports to USGS. Every earthquake near Buttonwillow

This page: a magnitude 1.5 earthquake was recorded 18 km (11 mi) southeast of Buttonwillow, CA, at 8:47 am PDT on 1 August 2025 (15:47 UTC), 24 km deep.

USGS: 18 km SE of Buttonwillow, CA

28 km (17 mi) WSW of Bakersfield, CA

8:47 am PDT, Aug 1, 2025 · · 24 km deep · released about 5.9 lb of TNT

Every earthquake near Buttonwillow Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kern County 55 kmKings County 98 kmSan Luis Obispo County 102 kmVentura County 104 kmSanta Barbara County 105 kmTulare County 117 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
8:47 am PDT on 1 August 2025 ()
Where
18 km (11 mi) southeast of Buttonwillow, CA · earthquakes near Buttonwillow
Magnitude
M 1.5 (ml)
Depth
24 km below the surface
Felt
no reports yet
Nearest
Kern County, 55 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 465 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth it was probably too small to be felt, even directly above it. In Buttonwillow, 18 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.

Earthquakes near other towns within 30 km: Ford City, Taft, South Taft, Taft Heights, Rosedale, Greenacres.

How big was it?

This earthquake released about 5.9 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.

  1. Mineral, Virginia 2011 M 5.8 2,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,800,000× the energy of this one
  3. Around the size people start to feel M 3.0 160× the energy of this one
  4. This earthquake M 1.5 about 5.9 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 5.2 on 2024-08-07 — about 340,000 times the energy of this one.

Before 2016, the USGS record lists 14 earthquakes of M5 or more within 50 km; the five largest:

  1. 7.5 The 1952 Kern County, California Earthquake · 47 km SE of this epicentre
  2. 5.8 Near Bakersfield, California · 48 km E of this epicentre
  3. 5.8 13km WNW of Grapevine, CA · 42 km SE of this epicentre
  4. 5.7 11km N of Lamont, CA · 41 km ENE of this epicentre
  5. 5.5 The 1952 Bakersfield, California Earthquake · 35 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 35.2788, -119.3330. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Kern County, CA 55 km (34 mi) E earthquakes near Kern County
Kings County, CA 98 km (61 mi) NNW earthquakes near Kings County
San Luis Obispo County, CA 102 km (63 mi) W earthquakes near San Luis Obispo County
Ventura County, CA 104 km (65 mi) S earthquakes near Ventura County
Santa Barbara County, CA 105 km (65 mi) SW earthquakes near Santa Barbara County
Tulare County, CA 117 km (73 mi) NNE earthquakes near Tulare County

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

Aftershocks so far

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

  1. 2.0 11 km W of Wasco, CA
  2. 2.1 16 km WNW of Grapevine, CA
  3. 1.5 19 km WSW of Lamont, CA
  4. 1.6 16 km SE of Maricopa, CA
  5. 1.7 18 km S of Maricopa, CA
  6. 2.7 9 km WSW of Grapevine, CA
  7. 2.1 10 km NNW of Grapevine, CA
  8. 1.5 9 km NNE of Pine Mountain Club, CA
  9. 2.0 25 km SW of Maricopa, CA
  10. 2.5 24 km SW of Maricopa, CA
  11. 2.4 10 km NNE of Pine Mountain Club, CA
  12. 1.6 24 km NW of Grapevine, CA
  13. 1.5 13 km NE of Maricopa, CA
  14. 2.5 25 km SW of Maricopa, CA
  15. 2.8 7 km NNE of Taft, 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.