California earthquakes

M2.1 earthquake 3 km NE of Penngrove, California

A magnitude 2.1 earthquake struck 3 km NE of Penngrove, California on Mon, Jan 5, 1981, 6:00 PM PST (02:00 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M3.0 9 km SW of Brentwood, California. This one was a foreshock.

Penngrove 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
2.1 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1981-01-06 02:00:13 UTC
Depth
5.3 km (3.3 mi), shallow
Epicenter
38.320° N, 122.638° W
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 0.5 km horizontally, 3.0 km in depth
Magnitude uncertainty
±0.21
Depth from
From location
Station coverage gap
71°
Stations used
14

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 123 in the 60 days after this one and 89 in the 30 days before it.

After

  1. 2.23 km NE of Penngrove, California · 16708 days ago · 5 km deep · 0 km away
  2. 1.73 km NE of Penngrove, California · 16708 days ago · 4 km deep · 0 km away
  3. 2.14 km SSE of Pittsburg, California · 16707 days ago · 14 km deep · 77 km away
  4. 2.12 km NNE of San Leandro, California · 16706 days ago · 3 km deep · 78 km away
  5. 2.17 km W of Cobb, California · 16706 days ago · 1 km deep · 58 km away
  6. 1.64 km WSW of Cobb, California · 16706 days ago · 1 km deep · 55 km away
  7. 2.67 km WSW of Cobb, California · 16705 days ago · 0 km deep · 56 km away
  8. 1.611 km W of Cobb, California · 16705 days ago · 2 km deep · 59 km away
  9. 1.610 km SW of Brentwood, California · 16705 days ago · 16 km deep · 91 km away
  10. 1.57 km WSW of Cobb, California · 16705 days ago · 3 km deep · 56 km away
  11. 1.812 km E of Lower Lake, California · 16704 days ago · 4 km deep · 68 km away
  12. 1.86 km W of Cobb, California · 16703 days ago · 0 km deep · 56 km away
  13. 2.36 km W of Cobb, California · 16703 days ago · 4 km deep · 57 km away
  14. 1.83 km SE of Clear Lake Riviera, California · 16703 days ago · 6 km deep · 68 km away
  15. 1.96 km WSW of Cobb, California · 16703 days ago · 1 km deep · 56 km away
  16. 1.94 km SE of Clear Lake Riviera, California · 16702 days ago · 5 km deep · 67 km away
  17. 2.54 km ENE of Penngrove, California · 16702 days ago · 0 km deep · 2 km away
  18. 1.62 km SSW of Moskowite Corner, California · 16701 days ago · 11 km deep · 40 km away
  19. 2.28 km ESE of Hidden Valley Lake, California · 16701 days ago · 8 km deep · 54 km away
  20. 1.56 km WSW of Cobb, California · 16701 days ago · 1 km deep · 55 km away
  21. 2.57 km WSW of Cobb, California · 16700 days ago · 1 km deep · 56 km away
  22. 1.81 km ESE of Pittsburg, California · 16699 days ago · 17 km deep · 74 km away
  23. 1.63 km E of Lucerne, California · 16698 days ago · 5 km deep · 86 km away
  24. 1.89 km WSW of Cobb, California · 16698 days ago · 1 km deep · 56 km away
  25. 1.51 km NNW of Clear Lake Riviera, California · 16697 days ago · 8 km deep · 73 km away
  26. 1.66 km WSW of Cobb, California · 16696 days ago · 1 km deep · 56 km away
  27. 1.61 km SW of Alamo, California · 16696 days ago · 9 km deep · 75 km away
  28. 1.75 km NNE of Pittsburg, California · 16696 days ago · 12 km deep · 74 km away
  29. 1.912 km WNW of Calistoga, California · 16695 days ago · 13 km deep · 36 km away
  30. 2.36 km WSW of Cobb, California · 16695 days ago · 2 km deep · 56 km away
  31. 2.04 km WSW of Cobb, California · 16695 days ago · -1 km deep · 56 km away
  32. 2.16 km W of Cobb, California · 16694 days ago · 3 km deep · 58 km away
  33. 1.66 km W of Cobb, California · 16694 days ago · 3 km deep · 57 km away
  34. 1.66 km W of Cobb, California · 16694 days ago · 4 km deep · 57 km away
  35. 2.53 km ESE of Berkeley, California · 16694 days ago · 12 km deep · 62 km away
  36. 1.55 km WSW of Cobb, California · 16694 days ago · 0 km deep · 55 km away
  37. 2.610 km SW of Brentwood, California · 16694 days ago · 16 km deep · 92 km away
  38. 2.46 km WSW of Cobb, California · 16692 days ago · 5 km deep · 56 km away
  39. 2.26 km W of Cobb, California · 16692 days ago · 4 km deep · 57 km away
  40. 1.54 km SE of Clear Lake Riviera, California · 16692 days ago · 3 km deep · 68 km away
  41. 1.67 km WSW of Cobb, California · 16692 days ago · 2 km deep · 56 km away
  42. 1.96 km SW of Kenwood, California · 16691 days ago · 0 km deep · 7 km away
  43. 2.47 km SW of Brentwood, California · 16691 days ago · 16 km deep · 92 km away
  44. 2.69 km WSW of Cobb, California · 16690 days ago · 2 km deep · 56 km away
  45. 1.810 km SW of Brentwood, California · 16689 days ago · 14 km deep · 92 km away
  46. 1.59 km WSW of Cobb, California · 16689 days ago · 1 km deep · 56 km away
  47. 1.83 km SW of Muir Beach, California · 16688 days ago · 2 km deep · 54 km away
  48. 2.61 km N of Pleasant Hill, California · 16688 days ago · 9 km deep · 64 km away
  49. 1.72 km N of Ashland, California · 16687 days ago · 6 km deep · 82 km away
  50. 1.89 km WSW of Cobb, California · 16687 days ago · 2 km deep · 56 km away
  51. 2.44 km WSW of Cobb, California · 16685 days ago · 2 km deep · 55 km away
  52. 1.93 km NNE of Larkfield-Wikiup, California · 16685 days ago · 3 km deep · 26 km away
  53. 1.66 km W of Cobb, California · 16685 days ago · 3 km deep · 57 km away
  54. 1.76 km WSW of Cobb, California · 16683 days ago · 0 km deep · 55 km away
  55. 2.010 km SW of Brentwood, California · 16682 days ago · 14 km deep · 93 km away
  56. 1.56 km W of Cobb, California · 16682 days ago · 3 km deep · 57 km away
  57. 1.66 km NNE of Larkfield-Wikiup, California · 16681 days ago · 3 km deep · 28 km away
  58. 1.511 km E of Blackhawk, California · 16680 days ago · 5 km deep · 92 km away
  59. 1.56 km W of Cobb, California · 16679 days ago · 2 km deep · 57 km away
  60. 1.810 km W of Cobb, California · 16678 days ago · 1 km deep · 60 km away

The first 60 of 123.

Before

  1. 1.78 km N of Geyserville, California · 16708 days ago · 5 km deep · 57 km away
  2. 1.93 km NE of Penngrove, California · 16708 days ago · 5 km deep · 0 km away
  3. 2.91 km N of Pleasant Hill, California · 16709 days ago · 10 km deep · 64 km away
  4. 2.16 km WSW of Cobb, California · 16710 days ago · 1 km deep · 54 km away
  5. 1.821 km W of Bolinas, California · 16710 days ago · 4 km deep · 54 km away
  6. 1.66 km W of Cobb, California · 16711 days ago · 3 km deep · 56 km away
  7. 2.81 km WSW of Geyserville, California · 16712 days ago · 5 km deep · 49 km away
  8. 2.12 km NW of Emerald Lake Hills, California · 16713 days ago · 3 km deep · 98 km away
  9. 1.77 km WSW of Cobb, California · 16713 days ago · 1 km deep · 56 km away
  10. 1.84 km ESE of San Ramon, California · 16713 days ago · 8 km deep · 88 km away
  11. 3.51 km NNE of Ashland, California · 16713 days ago · 10 km deep · 82 km away
  12. 2.37 km WSW of Cobb, California · 16716 days ago · 1 km deep · 56 km away
  13. 2.20 km ESE of Concord, California · 16716 days ago · 15 km deep · 66 km away
  14. 2.12 km NNE of Clear Lake Riviera, California · 16716 days ago · 1 km deep · 73 km away
  15. 1.84 km ESE of San Ramon, California · 16716 days ago · 7 km deep · 88 km away
  16. 2.00 km ESE of Concord, California · 16717 days ago · 14 km deep · 66 km away
  17. 1.93 km SW of San Bruno, California · 16717 days ago · 11 km deep · 81 km away
  18. 1.69 km NNE of Hopland, California · 16718 days ago · 5 km deep · 89 km away
  19. 1.96 km WSW of Cobb, California · 16719 days ago · 1 km deep · 56 km away
  20. 1.59 km NW of Cobb, California · 16719 days ago · 0 km deep · 63 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1058913. Read Sun, Oct 4, 2026, 10:47 PM UTC.