California earthquakes

M1.6 earthquake 6 km W of Cobb, California

A magnitude 1.6 earthquake struck 6 km W of Cobb, California on Tue, Feb 28, 1978, 9:27 PM PST (05:27 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M2.2 4 km SE of Calpella, 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
1978-03-01 05:27:02 UTC
Depth
3.3 km (2.1 mi), shallow
Epicenter
38.825° N, 122.802° 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 0.3 km horizontally, 0.4 km in depth
Magnitude uncertainty
±0.05
Depth from
From location
Station coverage gap
94°
Stations used
11

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 199 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 2.24 km SE of Calpella, California · 17712 days ago · 6 km deep · 53 km away
  2. 2.13 km ESE of Calpella, California · 17712 days ago · 0 km deep · 54 km away
  3. 3.05 km SE of Calpella, California · 17712 days ago · 9 km deep · 52 km away
  4. 2.8near the coast of Northern California · 17712 days ago · 6 km deep · 53 km away
  5. 3.75 km SE of Calpella, California · 17712 days ago · 11 km deep · 52 km away
  6. 2.94 km SE of Calpella, California · 17712 days ago · 6 km deep · 52 km away
  7. 2.43 km ESE of Calpella, California · 17712 days ago · 6 km deep · 54 km away
  8. 2.33 km SE of Calpella, California · 17712 days ago · 3 km deep · 54 km away
  9. 3.53 km ESE of Calpella, California · 17712 days ago · 12 km deep · 54 km away
  10. 2.31 km ENE of Calpella, California · 17712 days ago · 2 km deep · 57 km away
  11. 3.26 km SE of Calpella, California · 17712 days ago · 9 km deep · 51 km away
  12. 2.63 km ESE of Calpella, California · 17712 days ago · 7 km deep · 54 km away
  13. 2.45 km NE of Ukiah, California · 17712 days ago · 4 km deep · 51 km away
  14. 3.74 km SE of Calpella, California · 17712 days ago · 12 km deep · 53 km away
  15. 2.52 km SE of Calpella, California · 17712 days ago · 4 km deep · 55 km away
  16. 1.92 km ESE of Calpella, California · 17712 days ago · 2 km deep · 55 km away
  17. 1.95 km SE of Calpella, California · 17712 days ago · 1 km deep · 52 km away
  18. 2.53 km SE of Calpella, California · 17712 days ago · 7 km deep · 54 km away
  19. 1.6Northern California · 17712 days ago · 7 km deep · 40 km away
  20. 2.96 km SE of Calpella, California · 17712 days ago · 8 km deep · 51 km away
  21. 2.4near the coast of Northern California · 17712 days ago · 8 km deep · 54 km away
  22. 2.05 km NE of Ukiah, California · 17712 days ago · 0 km deep · 51 km away
  23. 2.03 km ESE of Calpella, California · 17712 days ago · 6 km deep · 54 km away
  24. 2.02 km E of Calpella, California · 17712 days ago · 10 km deep · 56 km away
  25. 2.65 km SE of Calpella, California · 17712 days ago · 6 km deep · 52 km away
  26. 2.22 km E of Calpella, California · 17712 days ago · 5 km deep · 56 km away
  27. 2.54 km SSE of Calpella, California · 17712 days ago · 3 km deep · 53 km away
  28. 2.05 km SE of Calpella, California · 17712 days ago · 0 km deep · 52 km away
  29. 2.11 km ESE of Calpella, California · 17712 days ago · 6 km deep · 56 km away
  30. 2.34 km SE of Calpella, California · 17712 days ago · 2 km deep · 52 km away
  31. 2.15 km SE of Calpella, California · 17712 days ago · 3 km deep · 52 km away
  32. 2.23 km SE of Calpella, California · 17712 days ago · 2 km deep · 53 km away
  33. 2.44 km SE of Calpella, California · 17712 days ago · 4 km deep · 53 km away
  34. 2.33 km SE of Calpella, California · 17712 days ago · 4 km deep · 54 km away
  35. 2.86 km NE of Ukiah, California · 17712 days ago · 6 km deep · 51 km away
  36. 2.15 km SE of Calpella, California · 17712 days ago · 2 km deep · 52 km away
  37. 2.11 km ENE of Calpella, California · 17712 days ago · 6 km deep · 56 km away
  38. 2.83 km SE of Calpella, California · 17712 days ago · 4 km deep · 54 km away
  39. 2.55 km NE of Ukiah, California · 17712 days ago · -1 km deep · 51 km away
  40. 1.77 km WSW of Cobb, California · 17712 days ago · 1 km deep · 3 km away
  41. 2.14 km SE of Calpella, California · 17712 days ago · 3 km deep · 53 km away
  42. 1.70 km W of Redwood Valley, California · 17712 days ago · -1 km deep · 60 km away
  43. 3.14 km SE of Calpella, California · 17712 days ago · 12 km deep · 52 km away
  44. 1.82 km ESE of Calpella, California · 17712 days ago · -1 km deep · 55 km away
  45. 2.43 km ESE of Calpella, California · 17712 days ago · 8 km deep · 54 km away
  46. 2.54 km SE of Calpella, California · 17712 days ago · 8 km deep · 53 km away
  47. 1.88 km NNE of Hopland, California · 17712 days ago · 0 km deep · 35 km away
  48. 2.22 km SE of Calpella, California · 17712 days ago · 4 km deep · 55 km away
  49. 2.03 km ESE of Calpella, California · 17712 days ago · 8 km deep · 54 km away
  50. 2.43 km ESE of Calpella, California · 17712 days ago · 5 km deep · 54 km away
  51. 2.84 km SSE of Calpella, California · 17711 days ago · 3 km deep · 52 km away
  52. 2.03 km SE of Calpella, California · 17711 days ago · 4 km deep · 54 km away
  53. 3.25 km SE of Calpella, California · 17711 days ago · 11 km deep · 51 km away
  54. 2.95 km SE of Calpella, California · 17711 days ago · 10 km deep · 52 km away
  55. 2.03 km SE of Calpella, California · 17711 days ago · 7 km deep · 53 km away
  56. 1.94 km SE of Calpella, California · 17711 days ago · 10 km deep · 53 km away
  57. 2.94 km SSE of Calpella, California · 17711 days ago · 11 km deep · 53 km away
  58. 2.24 km SE of Calpella, California · 17711 days ago · 9 km deep · 53 km away
  59. 1.83 km ESE of Calpella, California · 17711 days ago · 8 km deep · 54 km away
  60. 2.23 km SE of Calpella, California · 17711 days ago · 9 km deep · 53 km away

The first 60 of 199.

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1039124. Read Tue, Sep 22, 2026, 11:19 AM UTC.