M2.3 earthquake 9km E of Gilroy, CA
A magnitude 2.3 earthquake struck 9km E of Gilroy, CA on Sun, Mar 21, 2021, 11:09 PM PDT (06:09 UTC), 8 km (5 mi) below the surface.
A larger quake followed: M3.6 15km N of Morgan Hill, 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
- 2021-03-22 06:09:50 UTC
- Depth
- 8.1 km (5.1 mi), shallow
- Epicenter
- 36.999° N, 121.464° W
- Region
- California
- Felt reports
- 1
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
1 person reported to the USGS what they felt; the strongest reported shaking was II, weak shaking.

How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 0.1 km horizontally, 0.4 km in depth
- Magnitude uncertainty
- ±0.17
- Depth from
- From location
- Station coverage gap
- 36°
- Stations used
- 74
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 136 in the 60 days after this one and 69 in the 30 days before it.
After
- 2.04km NNW of Pinnacles, CA · 2023 days ago · 4 km deep · 55 km away
- 2.010km E of Gilroy, CA · 2023 days ago · 8 km deep · 0 km away
- 2.110km E of Gilroy, CA · 2023 days ago · 8 km deep · 0 km away · felt by 1
- 1.810km E of Gilroy, CA · 2023 days ago · 9 km deep · 1 km away · felt by 1
- 1.75km WSW of Hollister, CA · 2023 days ago · 4 km deep · 19 km away
- 1.710km E of Gilroy, CA · 2023 days ago · 9 km deep · 1 km away
- 2.727km SSW of South Dos Palos, CA · 2022 days ago · 4 km deep · 70 km away · felt by 4
- 2.126km SSW of South Dos Palos, CA · 2022 days ago · 2 km deep · 70 km away
- 1.710km SE of Sunol, CA · 2022 days ago · 5 km deep · 67 km away
- 2.515km ENE of Alum Rock, CA · 2021 days ago · 5 km deep · 51 km away · felt by 2
- 1.78km NE of Ridgemark, CA · 2021 days ago · 7 km deep · 20 km away
- 3.210km E of Gilroy, CA · 2021 days ago · 8 km deep · 1 km away · felt by 34
- 2.88km NE of Ridgemark, CA · 2021 days ago · 7 km deep · 20 km away · felt by 15
- 1.98km NE of Ridgemark, CA · 2020 days ago · 7 km deep · 20 km away
- 1.811km SW of Ridgemark, CA · 2020 days ago · 8 km deep · 30 km away
- 1.89km NNW of Pinnacles, CA · 2020 days ago · 7 km deep · 50 km away
- 1.910km E of Gilroy, CA · 2020 days ago · 9 km deep · 1 km away
- 2.612km NW of Pinnacles, CA · 2018 days ago · 5 km deep · 47 km away · felt by 3
- 1.712km NNE of Hollister, CA · 2016 days ago · 7 km deep · 14 km away
- 2.026km SSW of Los Banos, CA · 2016 days ago · 1 km deep · 51 km away
- 2.027km SSW of Los Banos, CA · 2016 days ago · 3 km deep · 50 km away
- 1.921km SSW of South Dos Palos, CA · 2016 days ago · 2 km deep · 71 km away
- 2.67km E of Alum Rock, CA · 2015 days ago · 8 km deep · 48 km away · felt by 90
- 2.123km NE of King City, CA · 2015 days ago · 11 km deep · 83 km away · felt by 1
- 1.99km NNE of Alum Rock, CA · 2015 days ago · 6 km deep · 57 km away
- 2.312km NNE of Hollister, CA · 2015 days ago · 6 km deep · 14 km away
- 3.36km SSE of San Juan Bautista, CA · 2014 days ago · 7 km deep · 23 km away · felt by 152
- 1.56km S of San Juan Bautista, CA · 2014 days ago · 6 km deep · 23 km away
- 2.56km S of San Juan Bautista, CA · 2014 days ago · 7 km deep · 24 km away · felt by 3
- 1.96km S of San Juan Bautista, CA · 2013 days ago · 7 km deep · 24 km away
- 1.86km S of San Juan Bautista, CA · 2013 days ago · 7 km deep · 24 km away · felt by 1
- 1.66km S of San Juan Bautista, CA · 2013 days ago · 7 km deep · 23 km away · felt by 1
- 2.14km WSW of Pleasanton, CA · 2013 days ago · 8 km deep · 82 km away
- 1.610km NE of Milpitas, CA · 2012 days ago · 5 km deep · 64 km away
- 2.412km NW of Pinnacles, CA · 2012 days ago · 6 km deep · 47 km away · felt by 1
- 2.86km S of San Juan Bautista, CA · 2011 days ago · 7 km deep · 23 km away · felt by 31
- 1.95km S of San Juan Bautista, CA · 2011 days ago · 7 km deep · 23 km away
- 2.25km S of San Juan Bautista, CA · 2011 days ago · 7 km deep · 23 km away
- 1.94km N of Pinnacles, CA · 2010 days ago · 10 km deep · 56 km away
- 2.16km SSE of San Juan Bautista, CA · 2009 days ago · 4 km deep · 23 km away · felt by 1
- 1.65km ESE of Pinnacles, CA · 2009 days ago · 7 km deep · 63 km away
- 2.110km NW of Pinnacles, CA · 2009 days ago · 6 km deep · 49 km away
- 2.03km N of Pinnacles, CA · 2009 days ago · 6 km deep · 56 km away
- 2.010km NNW of Pinnacles, CA · 2009 days ago · 6 km deep · 50 km away
- 2.420km SE of Livermore, CA · 2008 days ago · 2 km deep · 65 km away
- 1.83km N of Pinnacles, CA · 2008 days ago · 6 km deep · 57 km away
- 2.010km SE of Pinnacles, CA · 2008 days ago · 7 km deep · 68 km away
- 1.82km NE of Pinnacles, CA · 2007 days ago · 6 km deep · 59 km away
- 3.323km S of South Dos Palos, CA · 2007 days ago · 4 km deep · 73 km away · felt by 8
- 1.72km WNW of Newman, CA · 2007 days ago · 1 km deep · 52 km away
- 2.32km N of Pinnacles, CA · 2007 days ago · 7 km deep · 58 km away · felt by 2
- 1.77km ESE of Pinnacles, CA · 2006 days ago · 7 km deep · 66 km away
- 1.923km WSW of New Idria, CA · 2004 days ago · 10 km deep · 87 km away
- 2.914km SE of Livermore, CA · 2004 days ago · 4 km deep · 67 km away · felt by 70
- 2.314km SE of Livermore, CA · 2003 days ago · 4 km deep · 68 km away · felt by 2
- 2.09km ENE of Milpitas, CA · 2003 days ago · 7 km deep · 61 km away
- 1.78km ESE of Greenfield, CA · 2002 days ago · 6 km deep · 83 km away · felt by 1
- 2.15km NNE of Pinnacles, CA · 2001 days ago · 8 km deep · 56 km away
- 2.19km NW of Pinnacles, CA · 2001 days ago · 7 km deep · 51 km away
- 1.615km NW of Pinnacles, CA · 2000 days ago · 8 km deep · 45 km away
The first 60 of 136.
Before
- 1.711km SSW of Tres Pinos, CA · 2024 days ago · 0 km deep · 34 km away
- 2.515km N of Morgan Hill, CA · 2024 days ago · 6 km deep · 33 km away · felt by 7
- 2.025km W of Los Banos, CA · 2024 days ago · 1 km deep · 30 km away
- 1.716km NW of Pinnacles, CA · 2025 days ago · 6 km deep · 43 km away
- 1.74km NW of New Idria, CA · 2026 days ago · 9 km deep · 91 km away
- 1.79km NNW of Pinnacles, CA · 2027 days ago · 7 km deep · 50 km away
- 2.59km NW of Pinnacles, CA · 2027 days ago · 6 km deep · 50 km away · felt by 1
- 3.410km NW of Pinnacles, CA · 2027 days ago · 7 km deep · 49 km away · felt by 12
- 2.23km N of Pinnacles, CA · 2027 days ago · 6 km deep · 56 km away
- 1.86km S of San Juan Bautista, CA · 2027 days ago · 8 km deep · 24 km away
- 1.616km N of Morgan Hill, CA · 2028 days ago · 7 km deep · 35 km away
- 2.36km S of San Juan Bautista, CA · 2028 days ago · 7 km deep · 23 km away
- 1.66km SSE of San Juan Bautista, CA · 2028 days ago · 7 km deep · 23 km away
- 1.616km SSE of Tres Pinos, CA · 2028 days ago · 5 km deep · 43 km away
- 1.94km N of Pinnacles, CA · 2028 days ago · 7 km deep · 56 km away
- 1.78km E of Gilroy, CA · 2028 days ago · 5 km deep · 2 km away
- 1.514km E of Tres Pinos, CA · 2029 days ago · 9 km deep · 37 km away
- 1.84km NNW of Pinnacles, CA · 2029 days ago · 6 km deep · 55 km away
- 2.44km N of Pinnacles, CA · 2030 days ago · 6 km deep · 56 km away · felt by 3
- 2.64km N of Pinnacles, CA · 2030 days ago · 5 km deep · 56 km away · felt by 1
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event nc73540470. Read Mon, Oct 5, 2026, 12:50 PM UTC.