California earthquakes

M1.6 earthquake 5 km W of Cobb, California

A magnitude 1.6 earthquake struck 5 km W of Cobb, California on Sat, Jan 21, 1978, 3:21 AM PST (11:21 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M2.4 6 km ESE of Willits, 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.

Open the live map with earthquakes

The earthquake

Magnitude
1.6 (md), micro
Local time
UTC
1978-01-21 11:21:54 UTC
Depth
3.0 km (1.9 mi), shallow
Epicenter
38.814° N, 122.780° 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, 0.8 km in depth
Magnitude uncertainty
±0.19
Depth from
From location
Station coverage gap
90°
Stations used
8

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 73 in the 60 days after this one and 55 in the 30 days before it.

After

  1. 1.68 km WSW of Cobb, California · 17774 days ago · 1 km deep · 3 km away
  2. 2.46 km ESE of Willits, California · 17772 days ago · -1 km deep · 77 km away
  3. 1.511 km WNW of Cobb, California · 17772 days ago · 15 km deep · 8 km away
  4. 1.68 km W of Cobb, California · 17772 days ago · 0 km deep · 3 km away
  5. 2.07 km W of Cobb, California · 17772 days ago · 0 km deep · 3 km away
  6. 1.611 km ENE of Healdsburg, California · 17772 days ago · 5 km deep · 17 km away
  7. 1.93 km E of Saint Helena, California · 17770 days ago · 11 km deep · 46 km away
  8. 2.95 km ENE of Willits, California · 17770 days ago · 0 km deep · 82 km away
  9. 1.97 km SW of Calistoga, California · 17768 days ago · 5 km deep · 34 km away
  10. 1.56 km WSW of Cobb, California · 17768 days ago · 0 km deep · 2 km away
  11. 3.017 km NE of Lucerne, California · 17768 days ago · 6 km deep · 45 km away
  12. 1.96 km W of Cobb, California · 17767 days ago · 4 km deep · 2 km away
  13. 3.15 km ESE of Willits, California · 17766 days ago · 2 km deep · 79 km away
  14. 2.08 km S of Calistoga, California · 17766 days ago · 7 km deep · 39 km away
  15. 1.86 km W of Cobb, California · 17764 days ago · 0 km deep · 2 km away
  16. 2.29 km NNW of Redwood Valley, California · 17763 days ago · 7 km deep · 72 km away
  17. 2.31 km W of Angwin, California · 17762 days ago · 8 km deep · 38 km away
  18. 2.89 km NNE of Brooktrails, California · 17762 days ago · 4 km deep · 91 km away
  19. 2.418 km NE of Upper Lake, California · 17762 days ago · 3 km deep · 54 km away
  20. 1.84 km WSW of Cobb, California · 17761 days ago · 1 km deep · 1 km away
  21. 2.27 km NNE of Hopland, California · 17761 days ago · 1 km deep · 35 km away
  22. 2.27 km NE of Hopland, California · 17761 days ago · 2 km deep · 35 km away
  23. 1.67 km W of Cobb, California · 17760 days ago · 0 km deep · 2 km away
  24. 2.74 km ESE of Willits, California · 17759 days ago · 2 km deep · 79 km away
  25. 2.54 km ESE of Willits, California · 17759 days ago · 2 km deep · 79 km away
  26. 2.012 km ESE of Hidden Valley Lake, California · 17756 days ago · 3 km deep · 31 km away
  27. 1.66 km WSW of Cobb, California · 17755 days ago · 4 km deep · 1 km away
  28. 2.08 km ESE of Talmage, California · 17755 days ago · 8 km deep · 41 km away
  29. 2.37 km NNE of Nice, California · 17754 days ago · 7 km deep · 42 km away
  30. 2.46 km W of Cobb, California · 17754 days ago · 2 km deep · 1 km away
  31. 2.16 km W of Cobb, California · 17754 days ago · -1 km deep · 1 km away
  32. 2.56 km W of Cobb, California · 17753 days ago · 3 km deep · 2 km away
  33. 2.85 km ESE of Santa Rosa, California · 17752 days ago · 9 km deep · 45 km away
  34. 2.55 km ESE of Santa Rosa, California · 17752 days ago · 9 km deep · 45 km away
  35. 2.09 km ESE of Black Point-Green Point, California · 17751 days ago · 11 km deep · 87 km away
  36. 1.66 km W of Cobb, California · 17750 days ago · 1 km deep · 1 km away
  37. 1.811 km NE of Healdsburg, California · 17749 days ago · 4 km deep · 16 km away
  38. 1.610 km ESE of Hidden Valley Lake, California · 17749 days ago · 4 km deep · 29 km away
  39. 1.77 km W of Cobb, California · 17748 days ago · 3 km deep · 2 km away
  40. 1.76 km W of Cobb, California · 17747 days ago · -1 km deep · 2 km away
  41. 2.319 km SW of Stonyford, California · 17745 days ago · 9 km deep · 51 km away
  42. 2.48 km NNE of Hopland, California · 17744 days ago · 3 km deep · 37 km away
  43. 1.88 km S of Calistoga, California · 17743 days ago · 6 km deep · 39 km away
  44. 2.416 km NE of Nice, California · 17742 days ago · 7 km deep · 47 km away
  45. 2.46 km ESE of Willits, California · 17741 days ago · 6 km deep · 77 km away
  46. 2.111 km NE of Healdsburg, California · 17741 days ago · 5 km deep · 16 km away
  47. 1.610 km NE of Healdsburg, California · 17739 days ago · 4 km deep · 16 km away
  48. 2.411 km NNW of Potter Valley, California · 17739 days ago · 1 km deep · 75 km away
  49. 1.820 km WSW of Stonyford, CA · 17739 days ago · -1 km deep · 58 km away
  50. 1.83 km S of Clear Lake Riviera, California · 17738 days ago · 2 km deep · 14 km away
  51. 1.6Northern California · 17738 days ago · 3 km deep · 3 km away
  52. 1.66 km W of Cobb, California · 17738 days ago · 3 km deep · 2 km away
  53. 2.13 km SW of Calpella, California · 17737 days ago · 11 km deep · 59 km away
  54. 2.03 km SW of Calpella, California · 17737 days ago · 8 km deep · 60 km away
  55. 2.19 km NNW of Redwood Valley, California · 17737 days ago · 5 km deep · 72 km away
  56. 1.87 km W of Cobb, California · 17733 days ago · 0 km deep · 3 km away
  57. 1.66 km SSE of Boonville, California · 17733 days ago · 6 km deep · 50 km away
  58. 1.96 km W of Cobb, California · 17733 days ago · 3 km deep · 2 km away
  59. 2.53 km ENE of Willits, California · 17731 days ago · 3 km deep · 82 km away
  60. 1.82 km E of Forestville, California · 17730 days ago · 2 km deep · 39 km away

The first 60 of 73.

Before

  1. 1.710 km NW of Cobb, California · 17777 days ago · 1 km deep · 8 km away
  2. 3.010 km ESE of Willits, California · 17777 days ago · 5 km deep · 75 km away
  3. 2.58 km W of Cobb, California · 17777 days ago · 1 km deep · 3 km away
  4. 2.16 km W of Cobb, California · 17779 days ago · 1 km deep · 1 km away
  5. 1.99 km E of Hidden Valley Lake, California · 17779 days ago · 8 km deep · 29 km away
  6. 2.06 km W of Cobb, California · 17780 days ago · 3 km deep · 2 km away
  7. 3.34 km WNW of Ukiah, California · 17780 days ago · 11 km deep · 57 km away
  8. 3.44 km NW of Ukiah, California · 17782 days ago · 7 km deep · 57 km away
  9. 2.23 km WNW of Ukiah, California · 17782 days ago · 9 km deep · 56 km away
  10. 2.54 km WNW of Ukiah, California · 17782 days ago · 10 km deep · 56 km away
  11. 1.66 km WSW of Cobb, California · 17783 days ago · -1 km deep · 2 km away
  12. 3.16 km WSW of Cobb, California · 17783 days ago · 0 km deep · 2 km away
  13. 1.97 km WSW of Cobb, California · 17783 days ago · 0 km deep · 2 km away
  14. 2.47 km W of Cobb, California · 17783 days ago · 3 km deep · 3 km away
  15. 1.58 km W of Cobb, California · 17784 days ago · 1 km deep · 4 km away
  16. 3.08 km WSW of Cobb, California · 17784 days ago · 0 km deep · 3 km away
  17. 2.36 km W of Cobb, California · 17784 days ago · 3 km deep · 2 km away
  18. 2.28 km W of Cobb, California · 17784 days ago · 0 km deep · 4 km away
  19. 2.78 km W of Cobb, California · 17784 days ago · 0 km deep · 4 km away
  20. 1.76 km WSW of Cobb, California · 17784 days ago · 1 km deep · 1 km away

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1038670. Read Tue, Sep 22, 2026, 8:45 PM UTC.