Earthquake · reviewed by a seismologist
M 2.2md
Earthquake near Shandon, CA
No earthquake was likely felt in Shandon in the 24 hours to 2:53 am PST (10:53 UTC). The last one was M 2.0, 13 km (8 mi) NE, at 3:39 pm PST on 2 December 2025, estimated intensity II (weak) in town. Every earthquake near Shandon
This page: a magnitude 2.2 earthquake was recorded 18 km (11 mi) southeast of Shandon, CA, at 10:45 am PDT on 20 July 2019 (17:45 UTC), 11 km deep. 1 person has reported feeling it to USGS.
USGS: 18km SE of Shandon, CA
- When
- 10:45 am PDT on 20 July 2019 ()
- Where
- 18 km (11 mi) southeast of Shandon, CA · earthquakes near Shandon
- Magnitude
- M 2.2 (md)
- Depth
- 11 km below the surface
- Felt
- 1 report · strongest reported intensity II
- Nearest
- San Luis Obispo County, 23 km SW
- Nearest mapped fault
- San Juan fault, 2 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 1557 days ago
Earthquake alerts for Shandon, 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 14 km (9 mi) from the epicentre. In Shandon, 18 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.
How big was it?
This earthquake released about 56 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 270,000× the energy of this one
- Magna, Utah 2020 M 5.7 190,000× the energy of this one
- Around the size people start to feel M 3.0 17× the energy of this one
- This earthquake M 2.2 about 56 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 5 earthquakes of M5 or more within 50 km:
- 6.5 1922 Parkfield, California Earthquake · 25 km N of this epicentre
- 6.0 2004 Parkfield, California Earthquake · 34 km NNW of this epicentre
- 5.5 1966 Parkfield, California Earthquake · 30 km N of this epicentre
- 5.0 11 km NNE of Shandon, California · 26 km NNW of this epicentre
- 5.0 11 km NNE of Shandon, California · 26 km NNW 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 35.5235, -120.2550. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| San Luis Obispo County, CA | 23 km (14 mi) | SW | earthquakes near San Luis Obispo County |
| Kings County, CA | 73 km (45 mi) | NNE | earthquakes near Kings County |
| Santa Barbara County, CA | 111 km (69 mi) | S | earthquakes near Santa Barbara County |
| Monterey County, CA | 124 km (77 mi) | NW | earthquakes near Monterey County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
30 earthquakes have been recorded within 50 km since this one.
- 2.9 6km SE of Parkfield, CA
- 1.8 12km S of Kettleman City, CA
- 1.8 21km WNW of Simmler, CA
- 1.5 8km ESE of San Luis Obispo, CA
- 1.5 9km NNW of Cholame, CA
- 1.6 36km E of Cholame, CA
- 1.5 6km W of Templeton, CA
- 1.9 22km SSE of Kettleman City, CA
- 1.6 11km SE of Avenal, CA
- 1.7 5km W of Paso Robles, CA
- 4.3 11km NNW of Cholame, CA
- 1.7 7km E of Atascadero, CA
- 1.6 10km ESE of Simmler, CA
- 1.6 5km ESE of Cholame, CA
- 1.5 11km SW 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.