California earthquakes

M1.6 earthquake 7 km WSW of Cobb, California

A magnitude 1.6 earthquake struck 7 km WSW of Cobb, California on Sat, May 27, 1978, 1:16 PM PDT (20:16 UTC), 2 km (1 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.

Open the live map with earthquakes

The earthquake

Magnitude
1.6 (md), micro
Local time
UTC
1978-05-27 20:16:59 UTC
Depth
1.6 km (1.0 mi), shallow
Epicenter
38.802° N, 122.807° 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
±0.15
Depth from
From location
Station coverage gap
74°
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: 67 in the 60 days after this one and 58 in the 30 days before it.

After

  1. 2.3near the coast of Northern California · 17653 days ago · 6 km deep · 78 km away
  2. 1.69 km SW of Hopland, California · 17652 days ago · -1 km deep · 35 km away
  3. 1.52 km N of Deer Park, California · 17652 days ago · 13 km deep · 40 km away
  4. 1.75 km NE of Ukiah, California · 17651 days ago · 8 km deep · 52 km away
  5. 2.69 km WNW of Healdsburg, California · 17650 days ago · 6 km deep · 24 km away
  6. 2.216 km ENE of Potter Valley, California · 17650 days ago · 0 km deep · 62 km away
  7. 1.812 km S of Willows, California · 17648 days ago · 24 km deep · 86 km away
  8. 1.83 km E of Calpella, California · 17647 days ago · 6 km deep · 57 km away
  9. 1.53 km SE of Calpella, California · 17646 days ago · 6 km deep · 56 km away
  10. 1.77 km W of Cobb, California · 17645 days ago · 0 km deep · 2 km away
  11. 1.86 km ENE of Santa Rosa, California · 17645 days ago · 9 km deep · 41 km away
  12. 1.67 km W of Cobb, California · 17644 days ago · 3 km deep · 1 km away
  13. 2.310 km SW of Suisun, California · 17644 days ago · 6 km deep · 94 km away
  14. 1.93 km E of Calpella, California · 17643 days ago · 6 km deep · 57 km away
  15. 1.85 km E of Lower Lake, California · 17643 days ago · 4 km deep · 25 km away
  16. 1.65 km NE of Upper Lake, California · 17642 days ago · 8 km deep · 44 km away
  17. 1.812 km NE of Upper Lake, California · 17640 days ago · 1 km deep · 49 km away
  18. 1.63 km NNE of Nice, California · 17639 days ago · 7 km deep · 39 km away
  19. 1.73 km E of Calpella, California · 17637 days ago · 4 km deep · 57 km away
  20. 1.7Northern California · 17637 days ago · 11 km deep · 53 km away
  21. 1.56 km W of Cobb, California · 17636 days ago · 3 km deep · 2 km away
  22. 1.86 km W of Cobb, California · 17636 days ago · 3 km deep · 2 km away
  23. 2.87 km W of Cobb, California · 17633 days ago · 4 km deep · 2 km away
  24. 1.69 km W of Cobb, California · 17633 days ago · 1 km deep · 2 km away
  25. 1.611 km NW of Moskowite Corner, California · 17633 days ago · 16 km deep · 55 km away
  26. 2.413 km N of Potter Valley, California · 17632 days ago · 8 km deep · 77 km away
  27. 1.74 km E of Calpella, California · 17631 days ago · 4 km deep · 56 km away
  28. 2.66 km W of Cobb, California · 17628 days ago · 3 km deep · 2 km away
  29. 1.6Northern California · 17628 days ago · 4 km deep · 2 km away
  30. 1.5Northern California · 17628 days ago · 5 km deep · 20 km away
  31. 2.36 km W of Cobb, California · 17626 days ago · 4 km deep · 2 km away
  32. 1.63 km NNE of Cloverdale, California · 17624 days ago · 5 km deep · 18 km away
  33. 2.48 km W of Cobb, California · 17624 days ago · -1 km deep · 2 km away
  34. 1.66 km E of Calpella, California · 17624 days ago · 4 km deep · 54 km away
  35. 1.96 km WNW of Cobb, California · 17623 days ago · 2 km deep · 4 km away
  36. 1.68 km WSW of Cobb, California · 17621 days ago · 1 km deep · 1 km away
  37. 1.97 km W of Cobb, California · 17620 days ago · 3 km deep · 2 km away
  38. 1.65 km N of Larkfield-Wikiup, California · 17620 days ago · 5 km deep · 27 km away
  39. 2.11 km WNW of Moskowite Corner, California · 17620 days ago · 12 km deep · 65 km away
  40. 2.610 km ENE of Healdsburg, California · 17618 days ago · 7 km deep · 16 km away
  41. 2.317 km NNE of Nice, California · 17618 days ago · 11 km deep · 51 km away
  42. 1.817 km NNE of Nice, California · 17618 days ago · 9 km deep · 51 km away
  43. 1.711 km NE of Healdsburg, California · 17618 days ago · 6 km deep · 15 km away
  44. 1.511 km NE of Healdsburg, California · 17618 days ago · 4 km deep · 14 km away
  45. 1.57 km W of Cobb, California · 17617 days ago · 1 km deep · 1 km away
  46. 1.67 km W of Cobb, California · 17616 days ago · 4 km deep · 1 km away
  47. 1.611 km ENE of Healdsburg, California · 17615 days ago · 5 km deep · 16 km away
  48. 2.16 km NE of Inverness, California · 17613 days ago · 0 km deep · 74 km away
  49. 1.74 km WSW of Cobb, California · 17612 days ago · 4 km deep · 3 km away
  50. 2.07 km WSW of Cobb, California · 17610 days ago · -1 km deep · 0 km away
  51. 1.97 km WSW of Cobb, California · 17610 days ago · 2 km deep · 0 km away
  52. 2.07 km W of Cobb, California · 17609 days ago · 4 km deep · 2 km away
  53. 2.33 km SW of Oakville, California · 17607 days ago · 9 km deep · 55 km away
  54. 1.74 km SE of Calpella, CA · 17607 days ago · 5 km deep · 55 km away
  55. 2.9Northern California · 17606 days ago · 0 km deep · 2 km away
  56. 1.7Northern California · 17605 days ago · 1 km deep · 3 km away
  57. 1.88 km WSW of Cobb, California · 17605 days ago · 3 km deep · 1 km away
  58. 2.45 km WSW of Cobb, California · 17605 days ago · -1 km deep · 2 km away
  59. 2.39 km E of Comptche, California · 17604 days ago · 8 km deep · 77 km away
  60. 1.98 km ENE of Willits, California · 17603 days ago · 4 km deep · 79 km away

The first 60 of 67.

Before

  1. 3.8Northern California · 17655 days ago · 7 km deep · 29 km away
  2. 2.37 km WSW of Cobb, California · 17656 days ago · 4 km deep · 1 km away
  3. 2.46 km WSW of Cobb, California · 17660 days ago · 2 km deep · 1 km away
  4. 2.22 km WSW of Green Valley, California · 17660 days ago · 6 km deep · 82 km away
  5. 1.67 km W of Cobb, California · 17662 days ago · 4 km deep · 1 km away
  6. 1.74 km WSW of Cobb, California · 17662 days ago · 3 km deep · 3 km away
  7. 2.12 km WSW of Green Valley, California · 17662 days ago · 0 km deep · 82 km away
  8. 2.87 km WSW of Cobb, California · 17663 days ago · 0 km deep · 0 km away
  9. 1.72 km NE of Talmage, California · 17664 days ago · 1 km deep · 49 km away
  10. 2.921 km NE of Potter Valley, California · 17665 days ago · 12 km deep · 75 km away
  11. 2.722 km NE of Potter Valley, California · 17665 days ago · 9 km deep · 74 km away
  12. 2.12 km NW of Redwood Valley, California · 17667 days ago · 9 km deep · 64 km away
  13. 1.73 km ESE of Calpella, California · 17668 days ago · 2 km deep · 56 km away
  14. 1.93 km ESE of Calpella, California · 17669 days ago · 4 km deep · 56 km away
  15. 1.97 km WSW of Cobb, California · 17669 days ago · 4 km deep · 1 km away
  16. 1.99 km ENE of Manchester, California · 17671 days ago · 13 km deep · 70 km away
  17. 1.98 km W of Cobb, California · 17671 days ago · 2 km deep · 1 km away
  18. 3.024 km WNW of Elk Creek, California · 17672 days ago · 11 km deep · 99 km away
  19. 2.815 km ESE of Hidden Valley Lake, California · 17673 days ago · 6 km deep · 36 km away
  20. 1.88 km SSW of Guinda, California · 17673 days ago · 10 km deep · 49 km away

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1040439. Read Sun, Sep 27, 2026, 11:03 PM UTC.