Earthquake · reviewed by a seismologist
M 1.7ml
Earthquake near Three Rivers, CA
No earthquake was likely felt in Three Rivers in the 24 hours to 10:36 am PST (18:36 UTC). The last one was M 4.5, 131 km (81 mi) NE, at 7:37 pm PDT on 28 June 2025, estimated intensity II (weak) in town; 139 felt reports to USGS. Every earthquake near Three Rivers
This page: a magnitude 1.7 earthquake was recorded 10 km (6 mi) east-southeast of Three Rivers, CA, at 2:03 am PDT on 4 October 2024 (09:03 UTC), 4.5 km deep.
USGS: 10 km ESE of Three Rivers, CA
98 km (61 mi) ESE of Fresno, CA · 42 km (26 mi) NNE of Porterville, CA
- When
- 2:03 am PDT on 4 October 2024 ()
- Where
- 10 km (6 mi) east-southeast of Three Rivers, CA · earthquakes near Three Rivers
- Magnitude
- M 1.7 (ml)
- Depth
- 4.5 km below the surface
- Felt
- no reports yet
- Nearest
- Tulare County, 19 km S
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 769 days ago
Earthquake alerts for Three Rivers, CA
Get a notification in this browser when USGS records an earthquake near Three Rivers, CA. No account or email needed.
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 12 km (7 mi) from the epicentre. In Three Rivers, 10 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: Woodlake.
How big was it?
This earthquake released about 12 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.
- Mineral, Virginia 2011 M 5.8 1,300,000× the energy of this one
- Magna, Utah 2020 M 5.7 900,000× the energy of this one
- Around the size people start to feel M 3.0 80× the energy of this one
- This earthquake M 1.7 about 12 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:
- 5.0 5 km S of Springville, California · 35 km S 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 36.3970, -118.8087. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Tulare County, CA | 19 km (12 mi) | S | earthquakes near Tulare County |
| Fresno County, CA | 86 km (53 mi) | WNW | earthquakes near Fresno County |
| Kings County, CA | 97 km (60 mi) | WSW | earthquakes near Kings County |
| Kern County, CA | 117 km (73 mi) | S | earthquakes near Kern County |
| Madera County, CA | 123 km (77 mi) | NW | earthquakes near Madera County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
31 earthquakes have been recorded within 50 km since this one.
- 1.7 8 km NE of Porterville, CA
- 1.8 21 km E of Porterville, CA
- 1.6 9 km SE of Porterville, CA
- 1.9 10 km E of Porterville, CA
- 2.4 42 km WSW of Olancha, CA
- 2.1 6 km ENE of Orange Cove, CA
- 1.7 10 km E of Porterville, CA
- 1.6 24 km SW of Independence, CA
- 1.7 25 km SW of Independence, CA
- 1.6 25 km SW of Independence, CA
- 2.1 40 km WSW of Olancha, CA
- 2.0 42 km WSW of Olancha, CA
- 2.6 42 km WSW of Olancha, CA
- 1.5 42 km WSW of Olancha, CA
- 2.0 42 km WSW of Olancha, 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.