Earthquake · reviewed by a seismologist
M 1.8md
8km NE of San Juan Bautista, CA
- When
- Magnitude
- M 1.8 (md)
- Depth
- 4.4 km below the surface
- Felt
- 26 reports · strongest reported intensity IV
- Nearest
- Santa Clara County, 40 km NNW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2770 days ago
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 26 people have reported feeling it to USGS.
How big was it?
This earthquake released about 15 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 1,000,000× the energy of this one
- Magna, Utah 2020 M 5.7 710,000× the energy of this one
- Around the size people start to feel M 3.0 63× the energy of this one
- This earthquake M 1.8 about 15 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.
Where
Epicentre 36.9010, -121.4880. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Santa Clara County, CA | 40 km (25 mi) | SSE of here | earthquakes near Santa Clara County |
| Santa Cruz County, CA | 48 km (30 mi) | ESE of here | earthquakes near Santa Cruz County |
| San Benito County, CA | 48 km (30 mi) | NW of here | earthquakes near San Benito County |
| Monterey County, CA | 75 km (47 mi) | NNW of here | earthquakes near Monterey County |
| Merced County, CA | 75 km (47 mi) | WSW of here | earthquakes near Merced County |
| Stanislaus County, CA | 85 km (53 mi) | SSW of here | earthquakes near Stanislaus County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
48 earthquakes have been recorded within 50 km since this one.
- 1.7 5km N of Pinnacles, CA
- 3.1 11km ENE of San Martin, CA
- 1.9 11km ENE of San Martin, CA
- 1.7 10km NNE of Tres Pinos, CA
- 1.8 4km ESE of Tres Pinos, CA
- 2.2 10km NW of Pinnacles, CA
- 3.0 5km NNE of Pinnacles, CA
- 1.8 3km NNE of Pinnacles, CA
- 2.1 10km WSW of Ridgemark, CA
- 1.6 10km NNE of Pinnacles, CA
- 1.9 10km ENE of Morgan Hill, CA
- 1.9 3km NNW of Hollister, CA
- 1.7 7km WSW of Gilroy, CA
- 1.6 8km SE of Seven Trees, CA
- 1.8 7km WSW of Gilroy, 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.
For this area
The largest earthquake within 50 km in our catalogue was M 4.6 on 2017-11-13 — it released about 15,000 times the energy of this one.
From the QuakeIndex catalogue, built from the USGS FDSN event service.
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.