California earthquakes

M1.5 earthquake 7 km W of Cobb, California

A magnitude 1.5 earthquake struck 7 km W of Cobb, California on Wed, Jul 5, 1978, 12:31 AM PDT (07:31 UTC), 1 km (1 mi) below the surface.

A larger quake followed: M3.2 0 km WSW of Monument Hills, 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
1.5 (md), micro
Local time
UTC
1978-07-05 07:31:14 UTC
Depth
1.2 km (0.8 mi), shallow
Epicenter
38.813° N, 122.811° 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 0.4 km horizontally, 0.4 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
52°
Stations used
12

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 69 in the 60 days after this one and 36 in the 30 days before it.

After

  1. 1.67 km W of Cobb, California · 17619 days ago · 4 km deep · 0 km away
  2. 1.611 km ENE of Healdsburg, California · 17618 days ago · 5 km deep · 17 km away
  3. 2.16 km NE of Inverness, California · 17616 days ago · 0 km deep · 75 km away
  4. 1.74 km WSW of Cobb, California · 17615 days ago · 4 km deep · 4 km away
  5. 2.07 km WSW of Cobb, California · 17613 days ago · -1 km deep · 1 km away
  6. 1.97 km WSW of Cobb, California · 17613 days ago · 2 km deep · 1 km away
  7. 2.07 km W of Cobb, California · 17612 days ago · 4 km deep · 1 km away
  8. 2.33 km SW of Oakville, California · 17610 days ago · 9 km deep · 56 km away
  9. 1.74 km SE of Calpella, CA · 17610 days ago · 5 km deep · 54 km away
  10. 2.9Northern California · 17609 days ago · 0 km deep · 2 km away
  11. 1.7Northern California · 17608 days ago · 1 km deep · 4 km away
  12. 1.88 km WSW of Cobb, California · 17608 days ago · 3 km deep · 1 km away
  13. 2.45 km WSW of Cobb, California · 17608 days ago · -1 km deep · 3 km away
  14. 2.39 km E of Comptche, California · 17607 days ago · 8 km deep · 76 km away
  15. 1.98 km ENE of Willits, California · 17606 days ago · 4 km deep · 78 km away
  16. 2.17 km NE of Inverness, California · 17605 days ago · 1 km deep · 74 km away
  17. 2.00 km N of Kelseyville, California · 17604 days ago · 3 km deep · 19 km away
  18. 1.68 km ENE of Willits, California · 17604 days ago · 4 km deep · 78 km away
  19. 2.34 km WSW of Cobb, California · 17603 days ago · 1 km deep · 4 km away
  20. 1.58 km WSW of Cobb, California · 17603 days ago · 1 km deep · 1 km away
  21. 1.67 km W of Cobb, California · 17603 days ago · 0 km deep · 1 km away
  22. 1.74 km WSW of Cobb, California · 17601 days ago · 3 km deep · 3 km away
  23. 1.57 km W of Cobb, California · 17597 days ago · 4 km deep · 0 km away
  24. 2.04 km WSW of Cobb, California · 17596 days ago · 2 km deep · 4 km away
  25. 1.81 km NNE of Inverness, California · 17596 days ago · 5 km deep · 78 km away
  26. 1.93 km SE of Willows, California · 17595 days ago · 20 km deep · 95 km away
  27. 1.911 km SE of Boonville, California · 17594 days ago · 4 km deep · 43 km away
  28. 1.77 km WSW of Cobb, California · 17592 days ago · 2 km deep · 2 km away
  29. 2.26 km W of Cobb, California · 17590 days ago · 3 km deep · 1 km away
  30. 1.710 km ENE of Clearlake Oaks, California · 17590 days ago · -1 km deep · 35 km away
  31. 2.320 km WNW of Jenner, California · 17587 days ago · 0 km deep · 54 km away
  32. 2.08 km NE of Inverness, California · 17585 days ago · 0 km deep · 74 km away
  33. 1.85 km NNE of Crockett, California · 17584 days ago · 1 km deep · 96 km away
  34. 1.82 km ESE of Clear Lake Riviera, California · 17581 days ago · 1 km deep · 18 km away
  35. 1.52 km ESE of Clear Lake Riviera, California · 17581 days ago · 1 km deep · 18 km away
  36. 1.75 km WNW of Cobb, California · 17580 days ago · 3 km deep · 3 km away
  37. 2.08 km W of Lakeport, California · 17578 days ago · 4 km deep · 31 km away
  38. 2.17 km W of Cobb, California · 17577 days ago · 4 km deep · 0 km away
  39. 2.59 km NNW of Redwood Valley, California · 17577 days ago · 2 km deep · 70 km away
  40. 1.56 km ESE of Hidden Valley Lake, California · 17577 days ago · 2 km deep · 28 km away
  41. 2.715 km E of Angwin, California · 17576 days ago · 0 km deep · 54 km away
  42. 2.0Northern California · 17576 days ago · 0 km deep · 24 km away
  43. 1.68 km W of Cobb, California · 17576 days ago · 1 km deep · 1 km away
  44. 1.88 km W of Cobb, California · 17576 days ago · 0 km deep · 1 km away
  45. 2.06 km NE of Willits, California · 17574 days ago · 4 km deep · 82 km away
  46. 1.86 km NE of Willits, California · 17574 days ago · 4 km deep · 83 km away
  47. 1.86 km NE of Willits, California · 17574 days ago · 4 km deep · 82 km away
  48. 2.814 km E of Angwin, California · 17573 days ago · 7 km deep · 53 km away
  49. 1.58 km W of Cobb, California · 17572 days ago · 0 km deep · 1 km away
  50. 1.59 km W of Cobb, California · 17572 days ago · 0 km deep · 2 km away
  51. 1.510 km W of Cobb, California · 17570 days ago · 0 km deep · 3 km away
  52. 1.87 km W of Cobb, California · 17570 days ago · 3 km deep · 1 km away
  53. 1.53 km ENE of Calpella, California · 17569 days ago · 5 km deep · 57 km away
  54. 2.37 km WSW of Cobb, California · 17569 days ago · 1 km deep · 1 km away
  55. 1.98 km WSW of Cobb, California · 17569 days ago · 3 km deep · 2 km away
  56. 2.63 km WSW of Moskowite Corner, California · 17567 days ago · 5 km deep · 66 km away
  57. 2.43 km W of Moskowite Corner, California · 17567 days ago · 8 km deep · 65 km away
  58. 3.20 km WSW of Monument Hills, California · 17566 days ago · 8 km deep · 82 km away
  59. 2.22 km SSE of Monument Hills, California · 17564 days ago · 9 km deep · 84 km away
  60. 1.88 km E of Hopland, California · 17563 days ago · 6 km deep · 26 km away

The first 60 of 69.

Before

  1. 1.511 km NE of Healdsburg, California · 17620 days ago · 4 km deep · 15 km away
  2. 1.711 km NE of Healdsburg, California · 17621 days ago · 6 km deep · 16 km away
  3. 1.817 km NNE of Nice, California · 17621 days ago · 9 km deep · 50 km away
  4. 2.317 km NNE of Nice, California · 17621 days ago · 11 km deep · 50 km away
  5. 2.610 km ENE of Healdsburg, California · 17621 days ago · 7 km deep · 17 km away
  6. 2.11 km WNW of Moskowite Corner, California · 17623 days ago · 12 km deep · 66 km away
  7. 1.65 km N of Larkfield-Wikiup, California · 17623 days ago · 5 km deep · 29 km away
  8. 1.97 km W of Cobb, California · 17623 days ago · 3 km deep · 1 km away
  9. 1.68 km WSW of Cobb, California · 17623 days ago · 1 km deep · 1 km away
  10. 1.96 km WNW of Cobb, California · 17626 days ago · 2 km deep · 3 km away
  11. 1.66 km E of Calpella, California · 17626 days ago · 4 km deep · 53 km away
  12. 2.48 km W of Cobb, California · 17627 days ago · -1 km deep · 1 km away
  13. 1.63 km NNE of Cloverdale, California · 17627 days ago · 5 km deep · 17 km away
  14. 2.36 km W of Cobb, California · 17629 days ago · 4 km deep · 2 km away
  15. 1.5Northern California · 17631 days ago · 5 km deep · 21 km away
  16. 1.6Northern California · 17631 days ago · 4 km deep · 0 km away
  17. 2.66 km W of Cobb, California · 17631 days ago · 3 km deep · 1 km away
  18. 1.74 km E of Calpella, California · 17634 days ago · 4 km deep · 55 km away
  19. 2.413 km N of Potter Valley, California · 17634 days ago · 8 km deep · 75 km away
  20. 1.611 km NW of Moskowite Corner, California · 17636 days ago · 16 km deep · 56 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1040925. Read Wed, Sep 30, 2026, 7:13 PM UTC.