Earthquake · reviewed by a seismologist
M 2.2md
Earthquake near Morgan Hill, CA
No earthquake was likely felt in Morgan Hill in the 24 hours to 3:32 pm PST (23:32 UTC). The last one was M 2.6, 20 km (13 mi) N, at 12:38 pm PDT on 27 October 2026, estimated intensity II (weak) in town; 8 felt reports to USGS. Every earthquake near Morgan Hill
This page: a magnitude 2.2 earthquake was recorded 15 km (9 mi) north of Morgan Hill, CA, at 9:26 pm PDT on 5 April 2023 (04:26 UTC), 6.2 km deep. 4 people have reported feeling it to USGS.
USGS: 15km N of Morgan Hill, CA
16 km (10 mi) ESE of San Jose, CA
- When
- 9:26 pm PDT on 5 April 2023 ()
- Where
- 15 km (9 mi) north of Morgan Hill, CA · earthquakes near Morgan Hill
- Magnitude
- M 2.2 (md)
- Depth
- 6.2 km below the surface
- Felt
- 4 reports · strongest reported intensity IV
- Nearest
- Santa Clara County, 6 km SW
- Nearest mapped fault
- Calaveras fault, under 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 1315 days ago
Earthquake alerts for Morgan Hill, CA
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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 17 km (11 mi) from the epicentre. In Morgan Hill, 15 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: Morgan Hill 15 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 58 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 260,000× the energy of this one
- Magna, Utah 2020 M 5.7 180,000× the energy of this one
- Around the size people start to feel M 3.0 16× the energy of this one
- This earthquake M 2.2 about 58 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 5.1 on 2022-10-25 — about 20,000 times the energy of this one.
Before 2016, the USGS record lists 24 earthquakes of M5 or more within 50 km; the five largest:
- 6.9 The 1989 Loma Prieta, California Earthquake · 33 km SW of this epicentre
- 6.5 Near Morgan Hill, California · 17 km S of this epicentre
- 6.2 Near San Jose, California · 15 km WNW of this epicentre
- 6.2 The 1984 Morgan Hill, California Earthquake · 6 km NW of this epicentre
- 6.1 Near San Jose, California · 16 km WSW 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 37.2622, -121.6387. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Santa Clara County, CA | 6 km (4 mi) | SW | earthquakes near Santa Clara County |
| Santa Cruz County, CA | 43 km (27 mi) | SW | earthquakes near Santa Cruz County |
| Alameda County, CA | 49 km (31 mi) | NNW | earthquakes near Alameda County |
| Stanislaus County, CA | 65 km (41 mi) | ENE | earthquakes near Stanislaus County |
| San Mateo County, CA | 67 km (42 mi) | WNW | earthquakes near San Mateo County |
| Contra Costa County, CA | 78 km (49 mi) | NNW | earthquakes near Contra Costa County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
58 earthquakes have been recorded within 50 km since this one.
- 2.1 19km SW of Gustine, CA
- 1.9 13km NNE of Morgan Hill, CA
- 1.6 20km SW of Gustine, CA
- 1.5 2km E of Aromas, CA
- 1.6 13km ESE of Gilroy, CA
- 2.6 7km WSW of Gilroy, CA
- 1.9 11km NNW of Hollister, CA
- 2.6 6km SSW of Gilroy, CA
- 1.7 10km NNE of Alum Rock, CA
- 1.9 5km NNW of Day Valley, CA
- 1.7 4km SW of Felton, CA
- 1.6 13km ESE of Gilroy, CA
- 1.7 12km ESE of Gilroy, CA
- 1.8 10km E of Gilroy, CA
- 2.1 10km E 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.
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.