Earthquake · reviewed by a seismologist
M 2.5md
Earthquake near Armona, CA
No earthquake was likely felt in Armona in the 24 hours to 5:27 am PST (13:27 UTC). The last one was M 3.3, 32 km (20 mi) SW, at 6:21 am PDT on 4 August 2026, estimated intensity II (weak) in town; 2 felt reports to USGS. Every earthquake near Armona
This page: a magnitude 2.5 earthquake was recorded in Armona, CA, at 1:24 pm PDT on 3 May 2021 (20:24 UTC), 24 km deep.
USGS: 2km N of Armona, CA
in Hanford, CA · 51 km (32 mi) S of Fresno, CA
- When
- 1:24 pm PDT on 3 May 2021 ()
- Where
- in Armona, CA · earthquakes near Armona
- Magnitude
- M 2.5 (md)
- Depth
- 24 km below the surface
- Felt
- no reports yet
- Nearest
- Kings County, 30 km SSW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1951 days ago
Earthquake alerts for Armona, 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 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. 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: Hanford, Lucerne, Home Garden, Lemoore, Laton, Riverdale.
How big was it?
This earthquake released about 150 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 5.8 100,000× the energy of this one
- Magna, Utah 2020 M 5.7 72,000× the energy of this one
- Around the size people start to feel M 3.0 6.5× the energy of this one
- This earthquake M 2.5 about 150 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 one earthquake of M5 or more within 50 km:
- 5.6 8 km SW of Huron, California · 45 km WSW 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 36.3295, -119.7102. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Kings County, CA | 30 km (19 mi) | SSW | earthquakes near Kings County |
| Fresno County, CA | 48 km (30 mi) | N | earthquakes near Fresno County |
| Tulare County, CA | 84 km (52 mi) | E | earthquakes near Tulare County |
| Madera County, CA | 98 km (61 mi) | N | earthquakes near Madera County |
| San Luis Obispo County, CA | 124 km (77 mi) | SSW | earthquakes near San Luis Obispo County |
| Merced County, CA | 132 km (82 mi) | NW | earthquakes near Merced County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
44 earthquakes have been recorded within 50 km since this one.
- 1.8 6km NNE of Avenal, CA
- 2.6 10km NNE of Avenal, CA
- 2.1 19km ESE of Kettleman City, CA
- 2.1 19km ESE of Kettleman City, CA
- 1.9 18km ESE of Kettleman City, CA
- 2.0 18km ESE of Kettleman City, CA
- 1.9 21km ESE of Kettleman City, CA
- 1.8 20km ESE of Kettleman City, CA
- 1.6 20km ESE of Kettleman City, CA
- 1.7 11km NNE of Kettleman City, CA
- 2.2 12km SE of San Joaquin, CA
- 2.3 4km SSW of Armona, CA
- 2.5 11km N of Avenal, CA
- 2.1 12km WNW of Corcoran, CA
- 1.7 16km ESE of Kettleman City, 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.