Earthquake · reviewed by a seismologist
M 2.4md
Earthquake near Armona, CA
No earthquake was likely felt in Armona in the 24 hours to 3:30 am PST (11:30 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 2.4 earthquake was recorded 4 km (3 mi) northwest of Armona, CA, at 7:35 am PST on 16 February 2020 (15:35 UTC), 19 km deep.
USGS: 4km NW of Armona, CA
8 km (5 mi) W of Hanford, CA · 49 km (31 mi) S of Fresno, CA
- When
- 7:35 am PST on 16 February 2020 ()
- Where
- 4 km (3 mi) northwest of Armona, CA · earthquakes near Armona
- Magnitude
- M 2.4 (md)
- Depth
- 19 km below the surface
- Felt
- no reports yet
- Nearest
- Kings County, 31 km SSW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2458 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, people at rest would likely notice it out to about 9 km (6 mi) from the epicentre. In Armona, 4 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.
Likely felt in: Lemoore 6 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 110 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 130,000× the energy of this one
- Magna, Utah 2020 M 5.7 95,000× the energy of this one
- Around the size people start to feel M 3.0 8.5× the energy of this one
- This earthquake M 2.4 about 110 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 4.0 on 2018-11-27 — about 270 times the energy of this one.
Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:
- 5.6 8 km SW of Huron, California · 43 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 36.3412, -119.7420. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Kings County, CA | 31 km (19 mi) | SSW | earthquakes near Kings County |
| Fresno County, CA | 47 km (29 mi) | N | earthquakes near Fresno County |
| Tulare County, CA | 87 km (54 mi) | E | earthquakes near Tulare County |
| Madera County, CA | 97 km (60 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 | 129 km (80 mi) | NW | earthquakes near Merced County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
53 earthquakes have been recorded within 50 km since this one.
- 2.5 10km NNE of Kettleman City, CA
- 1.9 6km E of Huron, CA
- 2.4 4km NE of Lemoore, CA
- 1.8 9km SSE of Huron, CA
- 1.7 12km SW of Huron, CA
- 2.8 6km NNE of Lemoore, CA
- 2.6 5km ENE of West Park, CA
- 2.0 10km NNW of Avenal, CA
- 2.1 9km SE of Kettleman City, CA
- 1.8 8km SSE of Huron, CA
- 1.7 8km NE of Avenal, CA
- 1.7 8km NE of Avenal, CA
- 2.0 8km NE of Avenal, CA
- 1.7 11km E of Coalinga, CA
- 2.0 10km ESE of Huron, 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.