California earthquakes

M2.3 earthquake 6 km W of Cobb, California

A magnitude 2.3 earthquake struck 6 km W of Cobb, California on Sun, Jun 25, 1978, 7:33 AM PDT (14:33 UTC), 4 km (2 mi) below the surface.

A larger quake followed: M2.9 Northern California. This one was a foreshock.

Cobb 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
2.3 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1978-06-25 14:33:15 UTC
Depth
3.8 km (2.4 mi), shallow
Epicenter
38.820° N, 122.796° 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 0.2 km horizontally, 0.6 km in depth
Magnitude uncertainty
±0.17
Depth from
From location
Station coverage gap
37°
Stations used
21

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 66 in the 60 days after this one and 33 in the 30 days before it.

After

  1. 1.63 km NNE of Cloverdale, California · 17630 days ago · 5 km deep · 18 km away
  2. 2.48 km W of Cobb, California · 17630 days ago · -1 km deep · 3 km away
  3. 1.66 km E of Calpella, California · 17629 days ago · 4 km deep · 53 km away
  4. 1.96 km WNW of Cobb, California · 17629 days ago · 2 km deep · 2 km away
  5. 1.68 km WSW of Cobb, California · 17626 days ago · 1 km deep · 2 km away
  6. 1.97 km W of Cobb, California · 17626 days ago · 3 km deep · 1 km away
  7. 1.65 km N of Larkfield-Wikiup, California · 17626 days ago · 5 km deep · 29 km away
  8. 2.11 km WNW of Moskowite Corner, California · 17625 days ago · 12 km deep · 66 km away
  9. 2.610 km ENE of Healdsburg, California · 17624 days ago · 7 km deep · 18 km away
  10. 2.317 km NNE of Nice, California · 17624 days ago · 11 km deep · 49 km away
  11. 1.817 km NNE of Nice, California · 17624 days ago · 9 km deep · 49 km away
  12. 1.711 km NE of Healdsburg, California · 17624 days ago · 6 km deep · 17 km away
  13. 1.511 km NE of Healdsburg, California · 17623 days ago · 4 km deep · 16 km away
  14. 1.57 km W of Cobb, California · 17622 days ago · 1 km deep · 2 km away
  15. 1.67 km W of Cobb, California · 17622 days ago · 4 km deep · 2 km away
  16. 1.611 km ENE of Healdsburg, California · 17620 days ago · 5 km deep · 17 km away
  17. 2.16 km NE of Inverness, California · 17619 days ago · 0 km deep · 76 km away
  18. 1.74 km WSW of Cobb, California · 17617 days ago · 4 km deep · 3 km away
  19. 2.07 km WSW of Cobb, California · 17616 days ago · -1 km deep · 2 km away
  20. 1.97 km WSW of Cobb, California · 17616 days ago · 2 km deep · 2 km away
  21. 2.07 km W of Cobb, California · 17614 days ago · 4 km deep · 1 km away
  22. 2.33 km SW of Oakville, California · 17613 days ago · 9 km deep · 56 km away
  23. 1.74 km SE of Calpella, CA · 17612 days ago · 5 km deep · 54 km away
  24. 2.9Northern California · 17612 days ago · 0 km deep · 2 km away
  25. 1.7Northern California · 17611 days ago · 1 km deep · 3 km away
  26. 1.88 km WSW of Cobb, California · 17610 days ago · 3 km deep · 2 km away
  27. 2.45 km WSW of Cobb, California · 17610 days ago · -1 km deep · 3 km away
  28. 2.39 km E of Comptche, California · 17610 days ago · 8 km deep · 77 km away
  29. 1.98 km ENE of Willits, California · 17609 days ago · 4 km deep · 78 km away
  30. 2.17 km NE of Inverness, California · 17608 days ago · 1 km deep · 75 km away
  31. 2.00 km N of Kelseyville, California · 17607 days ago · 3 km deep · 18 km away
  32. 1.68 km ENE of Willits, California · 17607 days ago · 4 km deep · 78 km away
  33. 2.34 km WSW of Cobb, California · 17606 days ago · 1 km deep · 3 km away
  34. 1.58 km WSW of Cobb, California · 17606 days ago · 1 km deep · 2 km away
  35. 1.67 km W of Cobb, California · 17605 days ago · 0 km deep · 1 km away
  36. 1.74 km WSW of Cobb, California · 17603 days ago · 3 km deep · 2 km away
  37. 1.57 km W of Cobb, California · 17600 days ago · 4 km deep · 1 km away
  38. 2.04 km WSW of Cobb, California · 17599 days ago · 2 km deep · 3 km away
  39. 1.81 km NNE of Inverness, California · 17599 days ago · 5 km deep · 79 km away
  40. 1.93 km SE of Willows, California · 17598 days ago · 20 km deep · 93 km away
  41. 1.911 km SE of Boonville, California · 17596 days ago · 4 km deep · 44 km away
  42. 1.77 km WSW of Cobb, California · 17595 days ago · 2 km deep · 2 km away
  43. 2.26 km W of Cobb, California · 17593 days ago · 3 km deep · 1 km away
  44. 1.710 km ENE of Clearlake Oaks, California · 17592 days ago · -1 km deep · 34 km away
  45. 2.320 km WNW of Jenner, California · 17590 days ago · 0 km deep · 55 km away
  46. 2.08 km NE of Inverness, California · 17588 days ago · 0 km deep · 75 km away
  47. 1.85 km NNE of Crockett, California · 17587 days ago · 1 km deep · 96 km away
  48. 1.82 km ESE of Clear Lake Riviera, California · 17584 days ago · 1 km deep · 16 km away
  49. 1.52 km ESE of Clear Lake Riviera, California · 17584 days ago · 1 km deep · 16 km away
  50. 1.75 km WNW of Cobb, California · 17582 days ago · 3 km deep · 2 km away
  51. 2.08 km W of Lakeport, California · 17581 days ago · 4 km deep · 31 km away
  52. 2.17 km W of Cobb, California · 17580 days ago · 4 km deep · 1 km away
  53. 2.59 km NNW of Redwood Valley, California · 17580 days ago · 2 km deep · 70 km away
  54. 1.56 km ESE of Hidden Valley Lake, California · 17580 days ago · 2 km deep · 27 km away
  55. 2.715 km E of Angwin, California · 17579 days ago · 0 km deep · 53 km away
  56. 2.0Northern California · 17579 days ago · 0 km deep · 26 km away
  57. 1.68 km W of Cobb, California · 17578 days ago · 1 km deep · 2 km away
  58. 1.88 km W of Cobb, California · 17578 days ago · 0 km deep · 2 km away
  59. 2.06 km NE of Willits, California · 17577 days ago · 4 km deep · 82 km away
  60. 1.86 km NE of Willits, California · 17577 days ago · 4 km deep · 83 km away

The first 60 of 66.

Before

  1. 1.5Northern California · 17634 days ago · 5 km deep · 22 km away
  2. 1.6Northern California · 17634 days ago · 4 km deep · 2 km away
  3. 2.66 km W of Cobb, California · 17634 days ago · 3 km deep · 0 km away
  4. 1.74 km E of Calpella, California · 17636 days ago · 4 km deep · 55 km away
  5. 2.413 km N of Potter Valley, California · 17637 days ago · 8 km deep · 75 km away
  6. 1.611 km NW of Moskowite Corner, California · 17639 days ago · 16 km deep · 56 km away
  7. 1.69 km W of Cobb, California · 17639 days ago · 1 km deep · 3 km away
  8. 2.87 km W of Cobb, California · 17639 days ago · 4 km deep · 1 km away
  9. 1.86 km W of Cobb, California · 17642 days ago · 3 km deep · 1 km away
  10. 1.56 km W of Cobb, California · 17642 days ago · 3 km deep · 0 km away
  11. 1.7Northern California · 17642 days ago · 11 km deep · 51 km away
  12. 1.73 km E of Calpella, California · 17642 days ago · 4 km deep · 56 km away
  13. 1.63 km NNE of Nice, California · 17644 days ago · 7 km deep · 37 km away
  14. 1.812 km NE of Upper Lake, California · 17646 days ago · 1 km deep · 47 km away
  15. 1.65 km NE of Upper Lake, California · 17647 days ago · 8 km deep · 43 km away
  16. 1.85 km E of Lower Lake, California · 17648 days ago · 4 km deep · 24 km away
  17. 1.93 km E of Calpella, California · 17649 days ago · 6 km deep · 56 km away
  18. 2.310 km SW of Suisun, California · 17649 days ago · 6 km deep · 95 km away
  19. 1.67 km W of Cobb, California · 17650 days ago · 3 km deep · 1 km away
  20. 1.86 km ENE of Santa Rosa, California · 17651 days ago · 9 km deep · 42 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1040797. Read Sat, Oct 3, 2026, 1:27 PM UTC.