California earthquakes

M1.6 earthquake 9 km W of Cobb, California

A magnitude 1.6 earthquake struck 9 km W of Cobb, California on Sun, Jun 18, 1978, 9:46 AM PDT (16:46 UTC), 1 km (1 mi) below the surface.

A larger quake followed: M2.4 13 km N of Potter Valley, 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
1978-06-18 16:46:11 UTC
Depth
0.9 km (0.5 mi), shallow
Epicenter
38.813° N, 122.828° 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 0.2 km horizontally, 0.5 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
67°
Stations used
13

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 62 in the 60 days after this one and 32 in the 30 days before it.

After

  1. 1.611 km NW of Moskowite Corner, California · 17628 days ago · 16 km deep · 58 km away
  2. 2.413 km N of Potter Valley, California · 17627 days ago · 8 km deep · 75 km away
  3. 1.74 km E of Calpella, California · 17626 days ago · 4 km deep · 54 km away
  4. 2.66 km W of Cobb, California · 17624 days ago · 3 km deep · 3 km away
  5. 1.6Northern California · 17623 days ago · 4 km deep · 1 km away
  6. 1.5Northern California · 17623 days ago · 5 km deep · 22 km away
  7. 2.36 km W of Cobb, California · 17622 days ago · 4 km deep · 3 km away
  8. 1.63 km NNE of Cloverdale, California · 17619 days ago · 5 km deep · 16 km away
  9. 2.48 km W of Cobb, California · 17619 days ago · -1 km deep · 0 km away
  10. 1.66 km E of Calpella, California · 17619 days ago · 4 km deep · 52 km away
  11. 1.96 km WNW of Cobb, California · 17618 days ago · 2 km deep · 4 km away
  12. 1.68 km WSW of Cobb, California · 17616 days ago · 1 km deep · 1 km away
  13. 1.97 km W of Cobb, California · 17616 days ago · 3 km deep · 2 km away
  14. 1.65 km N of Larkfield-Wikiup, California · 17616 days ago · 5 km deep · 29 km away
  15. 2.11 km WNW of Moskowite Corner, California · 17615 days ago · 12 km deep · 67 km away
  16. 2.610 km ENE of Healdsburg, California · 17613 days ago · 7 km deep · 18 km away
  17. 2.317 km NNE of Nice, California · 17613 days ago · 11 km deep · 50 km away
  18. 1.817 km NNE of Nice, California · 17613 days ago · 9 km deep · 50 km away
  19. 1.711 km NE of Healdsburg, California · 17613 days ago · 6 km deep · 17 km away
  20. 1.511 km NE of Healdsburg, California · 17613 days ago · 4 km deep · 16 km away
  21. 1.57 km W of Cobb, California · 17612 days ago · 1 km deep · 1 km away
  22. 1.67 km W of Cobb, California · 17611 days ago · 4 km deep · 2 km away
  23. 1.611 km ENE of Healdsburg, California · 17610 days ago · 5 km deep · 17 km away
  24. 2.16 km NE of Inverness, California · 17608 days ago · 0 km deep · 75 km away
  25. 1.74 km WSW of Cobb, California · 17607 days ago · 4 km deep · 5 km away
  26. 2.07 km WSW of Cobb, California · 17605 days ago · -1 km deep · 2 km away
  27. 1.97 km WSW of Cobb, California · 17605 days ago · 2 km deep · 2 km away
  28. 2.07 km W of Cobb, California · 17604 days ago · 4 km deep · 2 km away
  29. 2.33 km SW of Oakville, California · 17602 days ago · 9 km deep · 57 km away
  30. 1.74 km SE of Calpella, CA · 17602 days ago · 5 km deep · 53 km away
  31. 2.9Northern California · 17602 days ago · 0 km deep · 4 km away
  32. 1.7Northern California · 17600 days ago · 1 km deep · 5 km away
  33. 1.88 km WSW of Cobb, California · 17600 days ago · 3 km deep · 2 km away
  34. 2.45 km WSW of Cobb, California · 17600 days ago · -1 km deep · 4 km away
  35. 2.39 km E of Comptche, California · 17599 days ago · 8 km deep · 75 km away
  36. 1.98 km ENE of Willits, California · 17598 days ago · 4 km deep · 78 km away
  37. 2.17 km NE of Inverness, California · 17597 days ago · 1 km deep · 74 km away
  38. 2.00 km N of Kelseyville, California · 17597 days ago · 3 km deep · 19 km away
  39. 1.68 km ENE of Willits, California · 17596 days ago · 4 km deep · 78 km away
  40. 2.34 km WSW of Cobb, California · 17596 days ago · 1 km deep · 5 km away
  41. 1.58 km WSW of Cobb, California · 17595 days ago · 1 km deep · 2 km away
  42. 1.67 km W of Cobb, California · 17595 days ago · 0 km deep · 2 km away
  43. 1.74 km WSW of Cobb, California · 17593 days ago · 3 km deep · 5 km away
  44. 1.57 km W of Cobb, California · 17590 days ago · 4 km deep · 1 km away
  45. 2.04 km WSW of Cobb, California · 17589 days ago · 2 km deep · 5 km away
  46. 1.81 km NNE of Inverness, California · 17588 days ago · 5 km deep · 78 km away
  47. 1.93 km SE of Willows, California · 17588 days ago · 20 km deep · 95 km away
  48. 1.911 km SE of Boonville, California · 17586 days ago · 4 km deep · 42 km away
  49. 1.77 km WSW of Cobb, California · 17585 days ago · 2 km deep · 2 km away
  50. 2.26 km W of Cobb, California · 17583 days ago · 3 km deep · 2 km away
  51. 1.710 km ENE of Clearlake Oaks, California · 17582 days ago · -1 km deep · 36 km away
  52. 2.320 km WNW of Jenner, California · 17580 days ago · 0 km deep · 52 km away
  53. 2.08 km NE of Inverness, California · 17577 days ago · 0 km deep · 74 km away
  54. 1.85 km NNE of Crockett, California · 17576 days ago · 1 km deep · 97 km away
  55. 1.82 km ESE of Clear Lake Riviera, California · 17573 days ago · 1 km deep · 18 km away
  56. 1.52 km ESE of Clear Lake Riviera, California · 17573 days ago · 1 km deep · 19 km away
  57. 1.75 km WNW of Cobb, California · 17572 days ago · 3 km deep · 4 km away
  58. 2.08 km W of Lakeport, California · 17570 days ago · 4 km deep · 30 km away
  59. 2.17 km W of Cobb, California · 17570 days ago · 4 km deep · 2 km away
  60. 2.59 km NNW of Redwood Valley, California · 17570 days ago · 2 km deep · 69 km away

The first 60 of 62.

Before

  1. 2.87 km W of Cobb, California · 17629 days ago · 4 km deep · 2 km away
  2. 1.86 km W of Cobb, California · 17631 days ago · 3 km deep · 3 km away
  3. 1.56 km W of Cobb, California · 17632 days ago · 3 km deep · 2 km away
  4. 1.7Northern California · 17632 days ago · 11 km deep · 52 km away
  5. 1.73 km E of Calpella, California · 17632 days ago · 4 km deep · 55 km away
  6. 1.63 km NNE of Nice, California · 17634 days ago · 7 km deep · 38 km away
  7. 1.812 km NE of Upper Lake, California · 17636 days ago · 1 km deep · 47 km away
  8. 1.65 km NE of Upper Lake, California · 17637 days ago · 8 km deep · 43 km away
  9. 1.85 km E of Lower Lake, California · 17638 days ago · 4 km deep · 27 km away
  10. 1.93 km E of Calpella, California · 17638 days ago · 6 km deep · 55 km away
  11. 2.310 km SW of Suisun, California · 17639 days ago · 6 km deep · 96 km away
  12. 1.67 km W of Cobb, California · 17640 days ago · 3 km deep · 2 km away
  13. 1.86 km ENE of Santa Rosa, California · 17640 days ago · 9 km deep · 43 km away
  14. 1.77 km W of Cobb, California · 17640 days ago · 0 km deep · 1 km away
  15. 1.53 km SE of Calpella, California · 17641 days ago · 6 km deep · 54 km away
  16. 1.83 km E of Calpella, California · 17643 days ago · 6 km deep · 55 km away
  17. 1.812 km S of Willows, California · 17643 days ago · 24 km deep · 87 km away
  18. 2.216 km ENE of Potter Valley, California · 17645 days ago · 0 km deep · 61 km away
  19. 2.69 km WNW of Healdsburg, California · 17645 days ago · 6 km deep · 24 km away
  20. 1.75 km NE of Ukiah, California · 17646 days ago · 8 km deep · 50 km away

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1040713. Read Wed, Sep 23, 2026, 3:34 AM UTC.