Earthquake near San Juan Bautista, CA

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 San Juan Bautista, 4 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.

Likely felt in: San Juan Bautista 4 km, intensity II · Prunedale 12 km, intensity II · Aromas 13 km, intensity II · Hollister 13 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 25 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 5.8 600,000× the energy of this one
2. Magna, Utah 2020 M 5.7 420,000× the energy of this one
3. Around the size people start to feel M 3.0 38× the energy of this one
4. This earthquake M 1.9 about 25 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

The largest earthquake within 50 km since 2016 was M 4.2 on 2016-07-19 — about 2,500 times the energy of this one.

Before 2016, the USGS record lists 27 earthquakes of M5 or more within 50 km; the five largest:

1. 6.9 The 1989 Loma Prieta, California Earthquake · 40 km NW of this epicentre Oct 18, 1989
2. 6.5 Near Morgan Hill, California · 35 km NNW of this epicentre Jul 1, 1911
3. 6.1 Near San Jose, California · 49 km NNW of this epicentre Jun 11, 1903
4. 5.9 10 km SE of Tres Pinos, California · 29 km ESE of this epicentre Apr 9, 1961
5. 5.8 Near Watsonville, California · 21 km NW of this epicentre Mar 11, 1910

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 36.8100, -121.5372. Map © OpenStreetMap contributors.

Nearby places

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

Aftershocks so far

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

1. 1.6 9 km NNE of San Martin, California 08:18 UTC
2. 1.7 7 km ESE of Prunedale, California 20:50 UTC
3. 2.3 21 km NE of Soledad, California 23:03 UTC
4. 2.3 25 km NE of Soledad, California 16:15 UTC
5. 1.6 25 km NE of Soledad, California 16:05 UTC
6. 1.6 25 km NE of Soledad, California 15:55 UTC
7. 1.7 2 km ENE of Aromas, California 19:22 UTC
8. 1.9 7 km WSW of Gilroy, California 05:10 UTC
9. 2.0 8 km ENE of Gilroy, California 22:57 UTC
10. 1.9 23 km NE of Soledad, California 21:22 UTC
11. 2.2 24 km NE of Soledad, California 20:03 UTC
12. 1.6 26 km NE of Soledad, California 19:52 UTC
13. 1.6 23 km NE of Soledad, California 19:39 UTC
14. 1.7 21 km NE of Soledad, California 03:39 UTC
15. 1.7 6 km ESE of Prunedale, California 20:52 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 10:44 UTC. 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.