Earthquake · reviewed by a seismologist
M 1.8ml
Earthquake near Three Rivers, CA
USGS: 23km ENE of Three Rivers, CA
59 km (37 mi) NE of Porterville, CA · 106 km (66 mi) ESE of Fresno, CA
- When
- 1:30 pm PDT on 13 October 2017 ()
- Where
- 23 km (14 mi) ENE of Three Rivers, CA · earthquakes near Three Rivers
- Magnitude
- M 1.8 (ml)
- Depth
- 20 km below the surface
- Felt
- no reports yet
- Nearest
- Tulare County, 32 km SSW
- Nearest mapped fault
- Kern Canyon fault, 23 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 3263 days ago
A magnitude 1.8 earthquake was recorded 23 km (14 mi) ENE of Three Rivers, CA, at 1:30 pm PDT on 13 October 2017 (20:30 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
How big was it?
This earthquake released about 13 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,100,000× the energy of this one
- Magna, Utah 2020 M 5.7 810,000× the energy of this one
- Around the size people start to feel M 3.0 72× the energy of this one
- This earthquake M 1.8 about 13 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 · 49 km SSW 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 36.5000, -118.6593. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Tulare County, CA | 32 km (20 mi) | SSW | earthquakes near Tulare County |
| Fresno County, CA | 93 km (58 mi) | WNW | earthquakes near Fresno County |
| Inyo County, CA | 112 km (70 mi) | E | earthquakes near Inyo County |
| Kings County, CA | 114 km (71 mi) | WSW | earthquakes near Kings County |
| Madera County, CA | 125 km (78 mi) | NW | earthquakes near Madera County |
| Mariposa County, CA | 163 km (101 mi) | NW | earthquakes near Mariposa County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
20 earthquakes have been recorded within 50 km since this one.
- 1.6 18km WSW of Olancha, CA
- 2.1 18km WSW of Olancha, CA
- 1.8 18km WSW of Olancha, CA
- 1.5 18km WSW of Olancha, CA
- 1.6 18km WSW of Olancha, CA
- 1.5 18km W of Olancha, CA
- 1.8 18km WSW of Olancha, CA
- 1.7 19km W of Olancha, CA
- 1.7 13km SE of Woodlake, CA
- 1.5 27km W of Olancha, CA
- 1.8 30km W of Olancha, CA
- 1.5 20 km W of Cartago, California
- 1.6 27km W of Olancha, CA
- 2.2 26km W of Olancha, CA
- 2.2 27km W 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.