Earthquake · reviewed by a seismologist
M 1.7md
Earthquake near Paso Robles, CA
USGS: 9 km SSE of Parkfield, California
- When
- 4:46 am PDT on 30 September 2016 ()
- Where
- 36 km (22 mi) NE of Paso Robles, CA · earthquakes near Paso Robles
- Magnitude
- M 1.7 (md)
- Depth
- 6.2 km below the surface
- Felt
- no reports yet
- Nearest
- San Luis Obispo County, 49 km S
- Nearest mapped fault
- San Andreas fault, 1 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 3521 days ago
A magnitude 1.7 earthquake was recorded 36 km (22 mi) NE of Paso Robles, CA, at 4:46 am PDT on 30 September 2016 (11:46 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
Earthquakes near other towns within 30 km: Shandon, Avenal.
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 18 earthquakes of M5 or more within 50 km; the five largest:
- 6.7 The 1983 Coalinga, California Earthquake · 46 km N of this epicentre
- 6.5 1922 Parkfield, California Earthquake · 14 km SE of this epicentre
- 6.4 1901 Parkfield, California Earthquake · 23 km NNW of this epicentre
- 6.0 2004 Parkfield, California Earthquake · 1 km SE of this epicentre
- 5.8 1934 Parkfield, California Earthquake · 26 km W 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 35.8238, -120.3743. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| San Luis Obispo County, CA | 49 km (30 mi) | S | earthquakes near San Luis Obispo County |
| Kings County, CA | 57 km (36 mi) | ENE | earthquakes near Kings County |
| Monterey County, CA | 96 km (60 mi) | WNW | earthquakes near Monterey County |
| San Benito County, CA | 108 km (67 mi) | NW | earthquakes near San Benito County |
| Fresno County, CA | 123 km (76 mi) | NNE | earthquakes near Fresno County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
49 earthquakes have been recorded within 50 km since this one.
- 2.2 20 km NW of Parkfield, California
- 1.6 9 km W of Templeton, California
- 2.9 8 km W of Templeton, California
- 2.1 8 km W of Templeton, California
- 2.3 9 km W of Templeton, California
- 1.7 8 km W of Templeton, California
- 4.0 9 km W of Templeton, California
- 2.8 1 km SSE of Avenal, California
- 1.6 2 km S of Avenal, California
- 2.3 4 km S of Avenal, California
- 1.6 3 km SSE of Avenal, California
- 1.5 2 km S of Avenal, California
- 1.7 3 km ESE of Avenal, California
- 1.7 3 km E of Avenal, California
- 1.5 3 km E of Avenal, California
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.