Earthquake · reviewed by a seismologist
M 1.7md
5km NNW of Aromas, CA
- When
- Magnitude
- M 1.7 (md)
- Depth
- 7.3 km below the surface
- Felt
- no reports yet
- Nearest
- Santa Cruz County, 32 km WNW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2566 days ago
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
How big was it?
This earthquake released about 11 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 1,400,000× the energy of this one
- Magna, Utah 2020 M 5.7 970,000× the energy of this one
- Around the size people start to feel M 3.0 86× the energy of this one
- This earthquake M 1.7 about 11 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 36.9303, -121.6580. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Santa Cruz County, CA | 32 km (20 mi) | ESE of here | earthquakes near Santa Cruz County |
| Santa Clara County, CA | 33 km (20 mi) | S of here | earthquakes near Santa Clara County |
| San Benito County, CA | 62 km (39 mi) | NW of here | earthquakes near San Benito County |
| Monterey County, CA | 83 km (51 mi) | NNW of here | earthquakes near Monterey County |
| Alameda County, CA | 83 km (51 mi) | SSE of here | earthquakes near Alameda County |
| San Mateo County, CA | 83 km (52 mi) | SE of here | earthquakes near San Mateo 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.
- 1.8 16km NW of Pinnacles, CA
- 1.6 16km NW of Pinnacles, CA
- 2.8 16km NW of Pinnacles, CA
- 1.7 11km ESE of Gilroy, CA
- 1.7 16km SSE of Tres Pinos, CA
- 1.9 8km ENE of San Martin, CA
- 2.1 20km NE of Morgan Hill, CA
- 1.6 19km NE of Morgan Hill, CA
- 2.5 3km SW of San Juan Bautista, CA
- 1.5 10km SW of Tres Pinos, CA
- 1.7 3km E of Aromas, CA
- 1.5 16km SSE of Tres Pinos, CA
- 2.4 3km WSW of San Juan Bautista, CA
- 2.0 12km S of Tres Pinos, CA
- 2.8 13km NNE of Tres Pinos, 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 20,000 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.