California earthquakes

M2.0 earthquake 1km N of Pacifica, CA

A magnitude 2.0 earthquake struck 1km N of Pacifica, CA on Sun, Dec 19, 2021, 10:02 PM PST (06:02 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M3.2 2km NNE of San Leandro, CA. This one was a foreshock.

Pacifica forecastMore in California

Map

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

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The earthquake

Magnitude
2.0 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
2021-12-20 06:02:34 UTC
Depth
7.5 km (4.7 mi), shallow
Epicenter
37.627° N, 122.487° W
Felt reports
14
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

14 people reported to the USGS what they felt; the strongest reported shaking was III, 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 0.2 km horizontally, 0.3 km in depth
Magnitude uncertainty
±0.15
Depth from
From location
Station coverage gap
113°
Stations used
65

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 45 in the 60 days after this one and 24 in the 30 days before it.

After

  1. 1.71km WNW of Danville, CA · 1748 days ago · 8 km deep · 48 km away · felt by 2
  2. 1.91km NW of Danville, CA · 1747 days ago · 8 km deep · 48 km away · felt by 3
  3. 1.62km NE of San Ramon, CA · 1746 days ago · 10 km deep · 50 km away · felt by 2
  4. 1.85km NNE of Alum Rock, CA · 1745 days ago · 0 km deep · 64 km away · felt by 5
  5. 2.34km NE of Fairview, CA · 1741 days ago · 7 km deep · 43 km away · felt by 27
  6. 1.52km S of Alamo, CA · 1739 days ago · 10 km deep · 46 km away · felt by 3
  7. 1.56km W of Kenwood, CA · 1739 days ago · 6 km deep · 88 km away
  8. 2.19km E of Alum Rock, CA · 1736 days ago · 9 km deep · 72 km away
  9. 1.510km ENE of Milpitas, CA · 1735 days ago · 8 km deep · 62 km away
  10. 2.62km SW of Colma, CA · 1735 days ago · 8 km deep · 4 km away
  11. 2.16km ENE of Kenwood, CA · 1733 days ago · 9 km deep · 90 km away
  12. 2.05km W of Yountville, CA · 1731 days ago · 6 km deep · 86 km away
  13. 1.711km NE of Milpitas, CA · 1730 days ago · 4 km deep · 60 km away
  14. 1.52km NE of Union City, CA · 1730 days ago · 5 km deep · 43 km away
  15. 1.75km WSW of Pacheco, CA · 1728 days ago · 9 km deep · 49 km away
  16. 1.54km WSW of Colma, CA · 1726 days ago · 9 km deep · 5 km away
  17. 1.61km NE of San Ramon, CA · 1726 days ago · 10 km deep · 49 km away
  18. 2.111km SSW of Brentwood, CA · 1725 days ago · 18 km deep · 67 km away
  19. 2.46km N of Diablo, CA · 1725 days ago · 13 km deep · 54 km away · felt by 25
  20. 1.62km NNE of San Ramon, CA · 1723 days ago · 11 km deep · 49 km away · felt by 2
  21. 1.98km E of Fremont, CA · 1723 days ago · 7 km deep · 53 km away · felt by 3
  22. 1.65km N of Lafayette, CA · 1717 days ago · 6 km deep · 47 km away
  23. 1.64km N of Lafayette, CA · 1717 days ago · 5 km deep · 46 km away · felt by 1
  24. 2.25km WNW of Dublin, CA · 1717 days ago · 6 km deep · 45 km away · felt by 12
  25. 1.96km WNW of Dublin, CA · 1717 days ago · 8 km deep · 45 km away · felt by 2
  26. 1.61km NE of Byron, CA · 1715 days ago · 4 km deep · 80 km away
  27. 1.51km SE of Pacifica, CA · 1714 days ago · 8 km deep · 3 km away
  28. 1.52km NNW of Green Valley, CA · 1714 days ago · 6 km deep · 77 km away
  29. 1.612km SW of Mountain House, CA · 1713 days ago · 18 km deep · 77 km away
  30. 1.512km SW of Mountain House, CA · 1713 days ago · 18 km deep · 76 km away
  31. 1.93km WSW of American Canyon, CA · 1713 days ago · 7 km deep · 62 km away
  32. 1.610km NNE of Morgan Hill, CA · 1712 days ago · 3 km deep · 91 km away · felt by 1
  33. 1.916km E of Seven Trees, CA · 1711 days ago · 4 km deep · 82 km away
  34. 2.23km NNW of Diablo, CA · 1701 days ago · 9 km deep · 52 km away · felt by 5
  35. 3.12km ENE of San Leandro, CA · 1701 days ago · 4 km deep · 33 km away · felt by 1,429
  36. 1.85km NW of Pittsburg, CA · 1701 days ago · 21 km deep · 70 km away · felt by 2
  37. 2.716km E of Seven Trees, CA · 1700 days ago · 5 km deep · 82 km away · felt by 37
  38. 1.95km SE of Brentwood, CA · 1697 days ago · 16 km deep · 76 km away
  39. 1.75km WNW of Byron, CA · 1697 days ago · 15 km deep · 76 km away
  40. 1.65km WNW of Byron, CA · 1697 days ago · 16 km deep · 76 km away
  41. 3.22km NNE of San Leandro, CA · 1696 days ago · 4 km deep · 32 km away · felt by 1,117
  42. 1.62km ENE of Pacifica, CA · 1695 days ago · 12 km deep · 2 km away
  43. 1.64km N of Inverness, CA · 1692 days ago · 13 km deep · 65 km away
  44. 2.93km ENE of San Leandro, CA · 1691 days ago · 6 km deep · 34 km away · felt by 414
  45. 1.83km ENE of San Leandro, CA · 1691 days ago · 6 km deep · 34 km away

Before

  1. 2.010km E of Alum Rock, CA · 1751 days ago · 9 km deep · 74 km away
  2. 1.89km NE of Morgan Hill, CA · 1755 days ago · 2 km deep · 94 km away
  3. 1.63km SSW of Half Moon Bay, CA · 1756 days ago · 10 km deep · 21 km away
  4. 2.32km SW of Discovery Bay, CA · 1756 days ago · 18 km deep · 83 km away
  5. 2.23km SSW of Half Moon Bay, CA · 1756 days ago · 10 km deep · 22 km away
  6. 1.63km SE of Concord, CA · 1756 days ago · 12 km deep · 56 km away
  7. 1.67km WSW of Lagunitas-Forest Knolls, CA · 1756 days ago · 5 km deep · 47 km away
  8. 1.63km SSW of Half Moon Bay, CA · 1758 days ago · 10 km deep · 22 km away
  9. 2.22km E of Pacheco, CA · 1761 days ago · 16 km deep · 55 km away
  10. 1.66km WSW of Colma, CA · 1761 days ago · 9 km deep · 5 km away · felt by 2
  11. 2.54km N of San Leandro, CA · 1765 days ago · 3 km deep · 33 km away · felt by 150
  12. 1.81km NE of San Ramon, CA · 1766 days ago · 9 km deep · 49 km away · felt by 1
  13. 1.74km S of Portola Valley, CA · 1767 days ago · 6 km deep · 39 km away · felt by 1
  14. 1.74km S of Portola Valley, CA · 1767 days ago · 6 km deep · 39 km away
  15. 2.79km ENE of Morgan Hill, CA · 1769 days ago · 2 km deep · 97 km away · felt by 38
  16. 2.01km W of Kensington, CA · 1770 days ago · 5 km deep · 36 km away · felt by 43
  17. 2.51km W of Kensington, CA · 1770 days ago · 5 km deep · 36 km away · felt by 965
  18. 1.723km WNW of Bonny Doon, CA · 1772 days ago · 7 km deep · 57 km away
  19. 1.67km ENE of Kenwood, CA · 1772 days ago · 7 km deep · 90 km away
  20. 1.97km ESE of Bethel Island, CA · 1779 days ago · 9 km deep · 89 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc73666026. Read Sun, Oct 4, 2026, 10:52 PM UTC.