M2.3 earthquake 4km NE of Fairview, CA
A magnitude 2.3 earthquake struck 4km NE of Fairview, CA on Tue, Dec 28, 2021, 8:58 PM PST (04:58 UTC), 7 km (4 mi) below the surface.
A larger quake followed: M3.2 2km NNE of San Leandro, CA. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 2.3 (Md, duration), micro
- Magnitude from
- Northern California Seismic System
- Local time
- UTC
- 2021-12-29 04:58:20 UTC
- Depth
- 7.2 km (4.5 mi), shallow
- Epicenter
- 37.706° N, 122.014° W
- Region
- California
- Felt reports
- 27
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
27 people reported to the USGS what they felt; the strongest reported shaking was III, weak shaking.

How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 0.1 km horizontally, 0.2 km in depth
- Magnitude uncertainty
- ±0.12
- Depth from
- From location
- Station coverage gap
- 35°
- Stations used
- 98
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 53 in the 60 days after this one and 23 in the 30 days before it.
After
- 1.52km S of Alamo, CA · 1739 days ago · 10 km deep · 14 km away · felt by 3
- 1.56km W of Kenwood, CA · 1739 days ago · 6 km deep · 95 km away
- 2.19km E of Alum Rock, CA · 1736 days ago · 9 km deep · 44 km away
- 1.510km ENE of Milpitas, CA · 1735 days ago · 8 km deep · 31 km away
- 2.62km SW of Colma, CA · 1734 days ago · 8 km deep · 40 km away
- 2.16km ENE of Kenwood, CA · 1733 days ago · 9 km deep · 91 km away
- 2.05km W of Yountville, CA · 1731 days ago · 6 km deep · 85 km away
- 1.711km NE of Milpitas, CA · 1730 days ago · 4 km deep · 28 km away
- 1.52km NE of Union City, CA · 1730 days ago · 5 km deep · 11 km away
- 1.75km WSW of Pacheco, CA · 1728 days ago · 9 km deep · 30 km away
- 1.54km WSW of Colma, CA · 1726 days ago · 9 km deep · 43 km away
- 1.61km NE of San Ramon, CA · 1726 days ago · 10 km deep · 9 km away
- 2.111km SSW of Brentwood, CA · 1725 days ago · 18 km deep · 26 km away
- 2.46km N of Diablo, CA · 1725 days ago · 13 km deep · 21 km away · felt by 25
- 1.99km E of Gilroy, CA · 1725 days ago · 5 km deep · 92 km away · felt by 2
- 2.39km E of Gilroy, CA · 1724 days ago · 6 km deep · 92 km away
- 1.62km NNE of San Ramon, CA · 1723 days ago · 11 km deep · 11 km away · felt by 2
- 1.98km E of Fremont, CA · 1723 days ago · 7 km deep · 22 km away · felt by 3
- 1.77km ENE of Gilroy, CA · 1722 days ago · 9 km deep · 88 km away
- 1.65km N of Lafayette, CA · 1717 days ago · 6 km deep · 26 km away
- 1.64km N of Lafayette, CA · 1717 days ago · 5 km deep · 26 km away · felt by 1
- 2.25km WNW of Dublin, CA · 1717 days ago · 6 km deep · 3 km away · felt by 12
- 1.96km WNW of Dublin, CA · 1717 days ago · 8 km deep · 3 km away · felt by 2
- 1.61km NE of Byron, CA · 1715 days ago · 4 km deep · 38 km away
- 1.51km SE of Pacifica, CA · 1714 days ago · 8 km deep · 42 km away
- 1.52km NNW of Green Valley, CA · 1714 days ago · 6 km deep · 64 km away
- 1.612km SW of Mountain House, CA · 1713 days ago · 18 km deep · 34 km away
- 1.512km SW of Mountain House, CA · 1713 days ago · 18 km deep · 34 km away
- 1.93km WSW of American Canyon, CA · 1713 days ago · 7 km deep · 56 km away
- 1.610km NNE of Morgan Hill, CA · 1711 days ago · 3 km deep · 67 km away · felt by 1
- 1.916km E of Seven Trees, CA · 1711 days ago · 4 km deep · 56 km away
- 2.84km SE of Aromas, CA · 1706 days ago · 8 km deep · 100 km away · felt by 32
- 2.06km SW of Gilroy, CA · 1706 days ago · 4 km deep · 90 km away · felt by 4
- 2.23km NNW of Diablo, CA · 1701 days ago · 9 km deep · 17 km away · felt by 5
- 3.12km ENE of San Leandro, CA · 1701 days ago · 4 km deep · 11 km away · felt by 1,429
- 1.85km NW of Pittsburg, CA · 1701 days ago · 21 km deep · 41 km away · felt by 2
- 2.716km E of Seven Trees, CA · 1700 days ago · 5 km deep · 55 km away · felt by 37
- 1.53km E of Aromas, CA · 1699 days ago · 2 km deep · 98 km away
- 1.95km SE of Brentwood, CA · 1697 days ago · 16 km deep · 35 km away
- 1.75km WNW of Byron, CA · 1697 days ago · 15 km deep · 36 km away
- 1.65km WNW of Byron, CA · 1696 days ago · 16 km deep · 35 km away
- 3.22km NNE of San Leandro, CA · 1696 days ago · 4 km deep · 12 km away · felt by 1,117
- 1.62km ENE of Pacifica, CA · 1695 days ago · 12 km deep · 41 km away
- 1.64km N of Inverness, CA · 1692 days ago · 13 km deep · 87 km away
- 2.54km NW of Aromas, CA · 1692 days ago · 11 km deep · 93 km away · felt by 10
- 2.93km ENE of San Leandro, CA · 1691 days ago · 6 km deep · 10 km away · felt by 414
- 1.83km ENE of San Leandro, CA · 1691 days ago · 6 km deep · 10 km away
- 1.62km NE of Union City, CA · 1689 days ago · 5 km deep · 11 km away · felt by 2
- 1.55km WSW of Daly City, CA · 1689 days ago · 8 km deep · 45 km away
- 1.72km SSW of Blackhawk, CA · 1689 days ago · 9 km deep · 14 km away · felt by 1
- 2.89km N of San Juan Bautista, CA · 1688 days ago · 6 km deep · 97 km away · felt by 18
- 1.98km E of Alum Rock, CA · 1687 days ago · 7 km deep · 44 km away
- 1.93km ESE of Pacheco, CA · 1681 days ago · 16 km deep · 30 km away · felt by 4
Before
- 1.85km NNE of Alum Rock, CA · 1745 days ago · 0 km deep · 37 km away · felt by 5
- 1.62km NE of San Ramon, CA · 1746 days ago · 10 km deep · 11 km away · felt by 2
- 1.91km NW of Danville, CA · 1747 days ago · 8 km deep · 13 km away · felt by 3
- 1.71km WNW of Danville, CA · 1748 days ago · 8 km deep · 13 km away · felt by 2
- 2.01km N of Pacifica, CA · 1750 days ago · 8 km deep · 43 km away · felt by 14
- 2.010km E of Alum Rock, CA · 1751 days ago · 9 km deep · 47 km away
- 1.89km NE of Morgan Hill, CA · 1755 days ago · 2 km deep · 70 km away
- 1.63km SSW of Half Moon Bay, CA · 1755 days ago · 10 km deep · 48 km away
- 2.32km SW of Discovery Bay, CA · 1756 days ago · 18 km deep · 41 km away
- 2.23km SSW of Half Moon Bay, CA · 1756 days ago · 10 km deep · 48 km away
- 1.63km SE of Concord, CA · 1756 days ago · 12 km deep · 27 km away
- 1.67km WSW of Lagunitas-Forest Knolls, CA · 1756 days ago · 5 km deep · 73 km away
- 1.63km SSW of Half Moon Bay, CA · 1757 days ago · 10 km deep · 48 km away
- 1.87km ENE of Gilroy, CA · 1759 days ago · 9 km deep · 89 km away
- 2.22km E of Pacheco, CA · 1761 days ago · 16 km deep · 31 km away
- 1.66km WSW of Colma, CA · 1761 days ago · 9 km deep · 45 km away · felt by 2
- 2.54km N of San Leandro, CA · 1765 days ago · 3 km deep · 14 km away · felt by 150
- 1.81km NE of San Ramon, CA · 1766 days ago · 9 km deep · 10 km away · felt by 1
- 1.74km S of Portola Valley, CA · 1767 days ago · 6 km deep · 45 km away · felt by 1
- 1.74km S of Portola Valley, CA · 1767 days ago · 6 km deep · 45 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event nc73669046. Read Sun, Oct 4, 2026, 8:50 PM UTC.