California earthquakes

M2.1 earthquake 9km ENE of Milpitas, CA

A magnitude 2.1 earthquake struck 9km ENE of Milpitas, CA on Sat, Jan 2, 2021, 5:44 AM PST (13:44 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M4.2 4km SE of Aromas, CA. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
2.1 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
2021-01-02 13:44:36 UTC
Depth
6.3 km (3.9 mi), shallow
Epicenter
37.454° N, 121.808° W
Felt reports
2
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

2 people reported to the USGS what they felt; the strongest reported shaking was II, weak shaking.

Did You Feel It? map: shaking reported by the public
Shaking reported by the public, by area. Map: USGS Did You Feel It?

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 0.1 km horizontally, 0.3 km in depth
Magnitude uncertainty
±0.24
Depth from
From location
Station coverage gap
32°
Stations used
79

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 98 in the 60 days after this one and 49 in the 30 days before it.

After

  1. 1.810km ESE of Livermore, CA · 2100 days ago · 3 km deep · 25 km away
  2. 1.53km NNE of Vine Hill, CA · 2097 days ago · 6 km deep · 69 km away · felt by 2
  3. 1.89km ENE of Milpitas, CA · 2097 days ago · 8 km deep · 2 km away
  4. 2.63km WNW of Concord, CA · 2096 days ago · 16 km deep · 62 km away · felt by 84
  5. 1.92km SE of Pacheco, CA · 2096 days ago · 14 km deep · 62 km away · felt by 3
  6. 3.08km NE of Alum Rock, CA · 2095 days ago · 10 km deep · 4 km away · felt by 442
  7. 2.34km ENE of Walnut Creek, CA · 2095 days ago · 10 km deep · 55 km away · felt by 28
  8. 1.916km E of Seven Trees, CA · 2092 days ago · 7 km deep · 22 km away
  9. 1.716km E of Seven Trees, CA · 2092 days ago · 6 km deep · 22 km away
  10. 1.63km ESE of Union City, CA · 2092 days ago · 6 km deep · 22 km away
  11. 1.611km SW of Ridgemark, CA · 2091 days ago · 7 km deep · 85 km away
  12. 2.02km NNW of Kensington, CA · 2090 days ago · 11 km deep · 67 km away · felt by 15
  13. 2.810km SSE of San Juan Bautista, CA · 2089 days ago · 5 km deep · 82 km away · felt by 26
  14. 3.62km W of Concord, CA · 2088 days ago · 15 km deep · 61 km away · felt by 3,784
  15. 2.12km WNW of Concord, CA · 2088 days ago · 13 km deep · 61 km away · felt by 106
  16. 1.73km S of Los Altos Hills, CA · 2088 days ago · 5 km deep · 31 km away
  17. 1.815km NNE of Morgan Hill, CA · 2087 days ago · 8 km deep · 27 km away
  18. 4.24km SE of Aromas, CA · 2086 days ago · 8 km deep · 68 km away · felt by 13,081 · tsunami flag
  19. 2.03km ESE of Aromas, CA · 2086 days ago · 8 km deep · 66 km away · felt by 10
  20. 3.04km SE of Aromas, CA · 2086 days ago · 8 km deep · 68 km away · felt by 483
  21. 1.94km SE of Aromas, CA · 2086 days ago · 7 km deep · 68 km away · felt by 64
  22. 1.65km SE of Aromas, CA · 2086 days ago · 6 km deep · 68 km away · felt by 9
  23. 2.22km S of Los Altos Hills, CA · 2084 days ago · 5 km deep · 31 km away · felt by 10
  24. 1.52km ESE of Aromas, CA · 2084 days ago · 8 km deep · 66 km away
  25. 1.610km ESE of Alum Rock, CA · 2084 days ago · 2 km deep · 15 km away
  26. 1.64km ESE of Aromas, CA · 2084 days ago · 6 km deep · 67 km away
  27. 1.811km ENE of Tres Pinos, CA · 2084 days ago · 8 km deep · 88 km away · felt by 3
  28. 1.56km SW of Gilroy, CA · 2083 days ago · 2 km deep · 57 km away
  29. 2.37km NW of San Francisco Zoo, CA · 2083 days ago · 5 km deep · 75 km away · felt by 6
  30. 1.87km NW of San Francisco Zoo, CA · 2083 days ago · 6 km deep · 75 km away
  31. 1.93km ESE of Aromas, CA · 2083 days ago · 7 km deep · 66 km away
  32. 1.83km ESE of Aromas, CA · 2083 days ago · 7 km deep · 66 km away
  33. 2.18km ENE of Alum Rock, CA · 2083 days ago · 7 km deep · 9 km away
  34. 1.63km ENE of Walnut Creek, CA · 2082 days ago · 10 km deep · 56 km away
  35. 1.86km E of Milpitas, CA · 2082 days ago · 2 km deep · 4 km away
  36. 1.85km SW of Gilroy, CA · 2082 days ago · 4 km deep · 57 km away
  37. 2.06km WNW of San Francisco Zoo, CA · 2082 days ago · 9 km deep · 74 km away
  38. 2.16km S of Gilroy, CA · 2082 days ago · 4 km deep · 59 km away
  39. 1.96km S of Gilroy, CA · 2082 days ago · 4 km deep · 59 km away
  40. 1.613km SSW of Ridgemark, CA · 2081 days ago · 7 km deep · 88 km away
  41. 1.93km S of Los Altos Hills, CA · 2081 days ago · 6 km deep · 32 km away · felt by 13
  42. 3.01km W of Concord, CA · 2081 days ago · 15 km deep · 60 km away · felt by 728
  43. 1.913km E of Tres Pinos, CA · 2077 days ago · 10 km deep · 94 km away
  44. 2.05km SW of Danville, CA · 2075 days ago · 9 km deep · 43 km away · felt by 1
  45. 1.79km NW of San Francisco Zoo, CA · 2074 days ago · 8 km deep · 77 km away
  46. 1.92km NW of Orinda, CA · 2073 days ago · 8 km deep · 60 km away · felt by 2
  47. 2.12km WNW of Castro Valley, CA · 2070 days ago · 5 km deep · 38 km away · felt by 12
  48. 1.75km N of Aromas, CA · 2070 days ago · 6 km deep · 60 km away
  49. 1.912km ESE of Gilroy, CA · 2069 days ago · 5 km deep · 64 km away
  50. 2.63km ESE of Berkeley, CA · 2069 days ago · 10 km deep · 59 km away · felt by 661
  51. 1.53km ESE of Berkeley, CA · 2068 days ago · 10 km deep · 59 km away · felt by 6
  52. 1.79km NNW of Hollister, CA · 2068 days ago · 6 km deep · 68 km away
  53. 1.812km ESE of Gilroy, CA · 2068 days ago · 6 km deep · 64 km away
  54. 1.912km ESE of Gilroy, CA · 2067 days ago · 6 km deep · 64 km away
  55. 2.212km WSW of Saratoga, CA · 2067 days ago · 10 km deep · 39 km away · felt by 2
  56. 1.610km SSW of Tres Pinos, CA · 2066 days ago · 2 km deep · 92 km away
  57. 2.09km E of Alum Rock, CA · 2065 days ago · 9 km deep · 11 km away
  58. 2.29km SSW of Tres Pinos, CA · 2065 days ago · 1 km deep · 91 km away
  59. 3.210km NE of Milpitas, CA · 2064 days ago · 5 km deep · 5 km away · felt by 436
  60. 1.810km NE of Milpitas, CA · 2064 days ago · 4 km deep · 5 km away · felt by 2

The first 60 of 98.

Before

  1. 1.96km NE of Aromas, CA · 2101 days ago · 5 km deep · 61 km away · felt by 1
  2. 1.910km SW of Tres Pinos, CA · 2101 days ago · 1 km deep · 89 km away
  3. 3.37km S of Muir Beach, CA · 2102 days ago · 13 km deep · 79 km away · felt by 3,865
  4. 2.60km E of San Pablo, CA · 2102 days ago · 5 km deep · 74 km away · felt by 271
  5. 2.014km SE of Livermore, CA · 2103 days ago · 4 km deep · 18 km away · felt by 2
  6. 2.04km NE of Tres Pinos, CA · 2103 days ago · 7 km deep · 85 km away
  7. 2.12km SSW of Los Altos Hills, CA · 2103 days ago · 5 km deep · 32 km away · felt by 13
  8. 2.83km S of Los Altos Hills, CA · 2104 days ago · 6 km deep · 32 km away · felt by 403
  9. 1.813km S of Tres Pinos, CA · 2105 days ago · 2 km deep · 98 km away
  10. 1.82km S of Los Altos Hills, CA · 2106 days ago · 5 km deep · 31 km away · felt by 5
  11. 3.23km W of San Juan Bautista, CA · 2106 days ago · 4 km deep · 71 km away · felt by 88
  12. 2.61km WNW of Bay Point, CA · 2107 days ago · 8 km deep · 66 km away · felt by 102
  13. 2.616km E of Seven Trees, CA · 2107 days ago · 6 km deep · 23 km away · felt by 22
  14. 1.92km NNE of San Leandro, CA · 2107 days ago · 7 km deep · 44 km away · felt by 1
  15. 1.911km SSE of San Juan Bautista, CA · 2108 days ago · 7 km deep · 82 km away
  16. 1.82km ESE of Aromas, CA · 2108 days ago · 8 km deep · 66 km away
  17. 1.58km ENE of Alum Rock, CA · 2108 days ago · 7 km deep · 10 km away
  18. 1.62km NW of Bay Point, CA · 2108 days ago · 0 km deep · 67 km away · felt by 1
  19. 1.710km NNE of San Martin, CA · 2109 days ago · 4 km deep · 40 km away
  20. 1.72km E of Berkeley, CA · 2109 days ago · 9 km deep · 61 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc73506020. Read Sat, Oct 3, 2026, 6:22 PM UTC.