California earthquakes

M1.7 earthquake 6 km W of Cobb, California

A magnitude 1.7 earthquake struck 6 km W of Cobb, California on Fri, May 5, 1978, 4:25 AM PDT (11:25 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M2.6 6 km W of Cobb, 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
1.7 (md), micro
Local time
UTC
1978-05-05 11:25:27 UTC
Depth
3.0 km (1.9 mi), shallow
Epicenter
38.820° N, 122.803° 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, 0.6 km in depth
Magnitude uncertainty
±0.14
Depth from
From location
Station coverage gap
80°
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: 76 in the 60 days after this one and 105 in the 30 days before it.

After

  1. 2.66 km W of Cobb, California · 17672 days ago · 4 km deep · 0 km away
  2. 1.95 km SE of Calpella, California · 17672 days ago · 5 km deep · 52 km away
  3. 2.23 km ESE of Calpella, California · 17672 days ago · 6 km deep · 55 km away
  4. 2.53 km ESE of Calpella, California · 17670 days ago · 4 km deep · 55 km away
  5. 1.93 km ESE of Calpella, California · 17670 days ago · 2 km deep · 55 km away
  6. 2.54 km E of Calpella, California · 17670 days ago · 2 km deep · 55 km away
  7. 1.64 km ESE of Calpella, California · 17669 days ago · 5 km deep · 54 km away
  8. 2.524 km ENE of Potter Valley, California · 17669 days ago · 0 km deep · 69 km away
  9. 1.84 km ESE of Calpella, California · 17669 days ago · 3 km deep · 54 km away
  10. 1.714 km SSW of Cloverdale, California · 17669 days ago · 0 km deep · 28 km away
  11. 1.88 km SSW of Guinda, California · 17668 days ago · 10 km deep · 49 km away
  12. 2.815 km ESE of Hidden Valley Lake, California · 17668 days ago · 6 km deep · 36 km away
  13. 3.323 km WNW of Elk Creek, California · 17667 days ago · 4 km deep · 99 km away
  14. 3.024 km WNW of Elk Creek, California · 17667 days ago · 11 km deep · 97 km away
  15. 1.98 km W of Cobb, California · 17666 days ago · 2 km deep · 2 km away
  16. 1.99 km ENE of Manchester, California · 17665 days ago · 13 km deep · 70 km away
  17. 1.97 km WSW of Cobb, California · 17664 days ago · 4 km deep · 3 km away
  18. 1.93 km ESE of Calpella, California · 17664 days ago · 4 km deep · 55 km away
  19. 1.73 km ESE of Calpella, California · 17663 days ago · 2 km deep · 55 km away
  20. 2.12 km NW of Redwood Valley, California · 17662 days ago · 9 km deep · 63 km away
  21. 2.722 km NE of Potter Valley, California · 17660 days ago · 9 km deep · 72 km away
  22. 2.921 km NE of Potter Valley, California · 17660 days ago · 12 km deep · 73 km away
  23. 1.72 km NE of Talmage, California · 17659 days ago · 1 km deep · 48 km away
  24. 2.87 km WSW of Cobb, California · 17658 days ago · 0 km deep · 2 km away
  25. 2.12 km WSW of Green Valley, California · 17657 days ago · 0 km deep · 83 km away
  26. 1.74 km WSW of Cobb, California · 17657 days ago · 3 km deep · 3 km away
  27. 1.67 km W of Cobb, California · 17657 days ago · 4 km deep · 1 km away
  28. 2.22 km WSW of Green Valley, California · 17655 days ago · 6 km deep · 84 km away
  29. 2.46 km WSW of Cobb, California · 17655 days ago · 2 km deep · 1 km away
  30. 2.37 km WSW of Cobb, California · 17651 days ago · 4 km deep · 3 km away
  31. 3.8Northern California · 17650 days ago · 7 km deep · 31 km away
  32. 1.67 km WSW of Cobb, California · 17650 days ago · 2 km deep · 2 km away
  33. 2.3near the coast of Northern California · 17648 days ago · 6 km deep · 77 km away
  34. 1.69 km SW of Hopland, California · 17647 days ago · -1 km deep · 35 km away
  35. 1.52 km N of Deer Park, California · 17647 days ago · 13 km deep · 41 km away
  36. 1.75 km NE of Ukiah, California · 17646 days ago · 8 km deep · 51 km away
  37. 2.69 km WNW of Healdsburg, California · 17645 days ago · 6 km deep · 26 km away
  38. 2.216 km ENE of Potter Valley, California · 17645 days ago · 0 km deep · 60 km away
  39. 1.812 km S of Willows, California · 17643 days ago · 24 km deep · 85 km away
  40. 1.83 km E of Calpella, California · 17642 days ago · 6 km deep · 55 km away
  41. 1.53 km SE of Calpella, California · 17641 days ago · 6 km deep · 54 km away
  42. 1.77 km W of Cobb, California · 17640 days ago · 0 km deep · 1 km away
  43. 1.86 km ENE of Santa Rosa, California · 17640 days ago · 9 km deep · 43 km away
  44. 1.67 km W of Cobb, California · 17639 days ago · 3 km deep · 1 km away
  45. 2.310 km SW of Suisun, California · 17639 days ago · 6 km deep · 95 km away
  46. 1.93 km E of Calpella, California · 17638 days ago · 6 km deep · 55 km away
  47. 1.85 km E of Lower Lake, California · 17638 days ago · 4 km deep · 24 km away
  48. 1.65 km NE of Upper Lake, California · 17637 days ago · 8 km deep · 43 km away
  49. 1.812 km NE of Upper Lake, California · 17635 days ago · 1 km deep · 47 km away
  50. 1.63 km NNE of Nice, California · 17634 days ago · 7 km deep · 37 km away
  51. 1.73 km E of Calpella, California · 17632 days ago · 4 km deep · 56 km away
  52. 1.7Northern California · 17632 days ago · 11 km deep · 51 km away
  53. 1.56 km W of Cobb, California · 17631 days ago · 3 km deep · 0 km away
  54. 1.86 km W of Cobb, California · 17631 days ago · 3 km deep · 0 km away
  55. 2.87 km W of Cobb, California · 17628 days ago · 4 km deep · 0 km away
  56. 1.69 km W of Cobb, California · 17628 days ago · 1 km deep · 2 km away
  57. 1.611 km NW of Moskowite Corner, California · 17628 days ago · 16 km deep · 56 km away
  58. 2.413 km N of Potter Valley, California · 17627 days ago · 8 km deep · 75 km away
  59. 1.74 km E of Calpella, California · 17626 days ago · 4 km deep · 55 km away
  60. 2.66 km W of Cobb, California · 17623 days ago · 3 km deep · 1 km away

The first 60 of 76.

Before

  1. 1.58 km WSW of Cobb, California · 17672 days ago · 1 km deep · 2 km away
  2. 1.83 km ESE of Calpella, California · 17673 days ago · 4 km deep · 55 km away
  3. 1.93 km SE of Calpella, California · 17673 days ago · 6 km deep · 55 km away
  4. 2.416 km W of Elk Creek, California · 17673 days ago · 4 km deep · 87 km away
  5. 1.86 km W of Cobb, California · 17674 days ago · 3 km deep · 1 km away
  6. 2.03 km E of Calpella, California · 17674 days ago · 6 km deep · 55 km away
  7. 2.35 km SE of Calpella, California · 17675 days ago · 1 km deep · 52 km away
  8. 1.94 km SSE of Calpella, California · 17675 days ago · 4 km deep · 53 km away
  9. 2.06 km SE of Calpella, California · 17675 days ago · 3 km deep · 52 km away
  10. 2.03 km E of Calpella, California · 17675 days ago · 7 km deep · 55 km away
  11. 2.125 km NE of Potter Valley, California · 17675 days ago · 14 km deep · 75 km away
  12. 1.93 km ESE of Calpella, California · 17675 days ago · 3 km deep · 55 km away
  13. 1.83 km SE of Calpella, California · 17675 days ago · 6 km deep · 54 km away
  14. 2.54 km WSW of Cobb, California · 17675 days ago · 1 km deep · 3 km away
  15. 1.73 km ESE of Calpella, California · 17676 days ago · 2 km deep · 54 km away
  16. 2.03 km E of Calpella, California · 17676 days ago · 6 km deep · 55 km away
  17. 1.54 km E of Calpella, California · 17676 days ago · 5 km deep · 55 km away
  18. 1.63 km E of Calpella, California · 17677 days ago · 6 km deep · 55 km away
  19. 1.87 km ENE of Hidden Valley Lake, California · 17677 days ago · 6 km deep · 28 km away
  20. 1.96 km W of Cobb, California · 17678 days ago · 2 km deep · 1 km away

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1040135. Read Tue, Sep 22, 2026, 9:32 PM UTC.