Earthquake · reviewed by a seismologist
M 1.9md
Earthquake near Stratford, CA
No earthquake was likely felt in Stratford in the 24 hours to 4:19 am PST (12:19 UTC). The last one was M 1.8, 8 km (5 mi) SW, at 7:37 am PDT on 6 August 2026, estimated intensity II (weak) in town. Every earthquake near Stratford
This page: a magnitude 1.9 earthquake was recorded 13 km (8 mi) south of Stratford, CA, at 4:08 pm PDT on 21 June 2020 (23:08 UTC), 19 km deep.
USGS: 13km S of Stratford, CA
79 km (49 mi) S of Fresno, CA · 31 km (19 mi) SSW of Hanford, CA
- When
- 4:08 pm PDT on 21 June 2020 ()
- Where
- 13 km (8 mi) south of Stratford, CA · earthquakes near Stratford
- Magnitude
- M 1.9 (md)
- Depth
- 19 km below the surface
- Felt
- no reports yet
- Nearest
- Kings County, 1 km W
- Nearest mapped fault
- Great Valley thrust fault system, 13 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 2333 days ago
Earthquake alerts for Stratford, 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. In Stratford, 13 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: Kettleman City, Corcoran, Lemoore Station, Lemoore, Armona, Home Garden.
How big was it?
This earthquake released about 21 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 710,000× the energy of this one
- Magna, Utah 2020 M 5.7 500,000× the energy of this one
- Around the size people start to feel M 3.0 45× the energy of this one
- This earthquake M 1.9 about 21 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 1,400 times the energy of this one.
Before 2016, the USGS record lists 7 earthquakes of M5 or more within 50 km; the five largest:
- 6.7 The 1983 Coalinga, California Earthquake · 49 km WNW of this epicentre
- 5.6 8 km SW of Huron, California · 33 km WNW of this epicentre
- 5.5 11 km NNE of Coalinga, California · 47 km WNW of this epicentre
- 5.5 11 km NE of Coalinga, California · 46 km WNW of this epicentre
- 5.3 4 km NNE of Coalinga, California · 50 km WNW 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 36.0727, -119.8007. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Kings County, CA | 1 km (1 mi) | W | earthquakes near Kings County |
| Fresno County, CA | 78 km (48 mi) | N | earthquakes near Fresno County |
| Tulare County, CA | 93 km (58 mi) | E | earthquakes near Tulare County |
| San Luis Obispo County, CA | 96 km (60 mi) | SW | earthquakes near San Luis Obispo County |
| Kern County, CA | 126 km (78 mi) | SE | earthquakes near Kern County |
| San Benito County, CA | 130 km (81 mi) | WNW | earthquakes near San Benito 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.
- 1.7 12km SW of Huron, CA
- 1.8 14km SE of Kettleman City, CA
- 1.7 12km NNW of Avenal, CA
- 2.0 6km NNW of Kettleman City, CA
- 1.9 11km SSE of Huron, CA
- 2.2 9km NE of Kettleman City, CA
- 1.8 10km NE of Coalinga, CA
- 2.3 6km NNE of Avenal, CA
- 1.7 9km E of Coalinga, CA
- 1.8 10km W of Huron, CA
- 1.7 11km ENE of Coalinga, CA
- 1.7 8km E of Coalinga, CA
- 2.5 10km NNE of Kettleman City, CA
- 1.9 6km E of Huron, CA
- 2.4 4km NE of Lemoore, 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.