4km SSE of Highlands-Baywood Park, CA

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 33 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.

1. Mineral, Virginia 2011 M 5.8 450,000× the energy of this one
2. Magna, Utah 2020 M 5.7 320,000× the energy of this one
3. Around the size people start to feel M 3.0 29× the energy of this one
4. This earthquake M 2.0 about 33 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 37.4868, -122.3223. Map © OpenStreetMap contributors.

Nearby places

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

56 earthquakes have been recorded within 50 km since this one.

1. 2.2 4km W of San Francisco Zoo, CA 14:47 UTC
2. 1.9 2km ENE of Berkeley, CA 21:19 UTC
3. 1.9 6km SSE of Portola Valley, CA 02:41 UTC
4. 1.7 3km ESE of Berkeley, CA 20:41 UTC
5. 1.7 7km SSE of Portola Valley, CA 16:48 UTC
6. 1.8 6km SSE of Portola Valley, CA 16:17 UTC
7. 2.0 3km ESE of Berkeley, CA 15:31 UTC
8. 2.4 3km ESE of Berkeley, CA 15:08 UTC
9. 2.9 3km ESE of Berkeley, CA 09:41 UTC
10. 2.0 6km SSE of Portola Valley, CA 11:51 UTC
11. 2.9 2km N of Piedmont, CA 05:31 UTC
12. 1.9 3km ESE of Berkeley, CA 16:39 UTC
13. 1.9 3km WSW of Cupertino, CA 08:39 UTC
14. 1.8 2km WNW of Los Altos Hills, CA 21:11 UTC
15. 1.8 2km SW of San Francisco Zoo, CA 05:51 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 16:33 UTC. 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 4.4 on 2018-01-04 — it released about 3,300 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.