California earthquakes

M1.6 earthquake 4 km WSW of Cobb, California

A magnitude 1.6 earthquake struck 4 km WSW of Cobb, California on Mon, Jul 18, 1983, 1:31 AM PDT (08:31 UTC), 4 km (2 mi) below the surface.

A larger quake followed: M3.1 5 km SW 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.

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The earthquake

Magnitude
1.6 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1983-07-18 08:31:53 UTC
Depth
3.7 km (2.3 mi), shallow
Epicenter
38.812° N, 122.775° 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, 1.4 km in depth
Magnitude uncertainty
±0.11
Depth from
From location
Station coverage gap
84°
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: 169 in the 60 days after this one and 98 in the 30 days before it.

After

  1. 1.63 km ESE of Calpella, California · 15784 days ago · 4 km deep · 57 km away
  2. 1.92 km S of Geyserville, California · 15784 days ago · 4 km deep · 18 km away
  3. 1.58 km WSW of Cobb, California · 15784 days ago · 4 km deep · 4 km away
  4. 2.010 km W of Plumas Lake, California · 15783 days ago · 6 km deep · 97 km away
  5. 1.65 km S of Cobb, California · 15783 days ago · 1 km deep · 6 km away
  6. 1.611 km SE of Hidden Valley Lake, California · 15782 days ago · 2 km deep · 29 km away
  7. 1.63 km WSW of Calpella, California · 15782 days ago · 8 km deep · 61 km away
  8. 1.8Northern California · 15781 days ago · 3 km deep · 2 km away
  9. 1.88 km S of Cobb, California · 15781 days ago · 0 km deep · 9 km away
  10. 1.95 km S of Cobb, California · 15781 days ago · -1 km deep · 7 km away
  11. 1.79 km W of Cobb, California · 15781 days ago · 2 km deep · 5 km away
  12. 1.77 km WSW of Cobb, California · 15780 days ago · 3 km deep · 3 km away
  13. 1.77 km S of Cobb, California · 15780 days ago · -1 km deep · 8 km away
  14. 2.07 km W of Kenwood, California · 15780 days ago · 6 km deep · 46 km away
  15. 1.911 km ESE of Hidden Valley Lake, California · 15779 days ago · 6 km deep · 29 km away
  16. 1.85 km WSW of Cobb, California · 15779 days ago · 0 km deep · 2 km away
  17. 1.84 km WSW of Moskowite Corner, California · 15779 days ago · 7 km deep · 63 km away
  18. 2.17 km ESE of Santa Rosa, California · 15779 days ago · 6 km deep · 45 km away
  19. 1.75 km SW of Cobb, California · 15779 days ago · -1 km deep · 2 km away
  20. 1.86 km WSW of Cobb, California · 15779 days ago · 1 km deep · 2 km away
  21. 1.65 km WSW of Cobb, California · 15779 days ago · 0 km deep · 1 km away
  22. 1.55 km WSW of Cobb, California · 15779 days ago · 0 km deep · 1 km away
  23. 2.37 km WSW of Moskowite Corner, California · 15778 days ago · 8 km deep · 62 km away
  24. 1.511 km SE of Hidden Valley Lake, California · 15778 days ago · 3 km deep · 29 km away
  25. 1.71 km SSW of Redwood Valley, California · 15777 days ago · 0 km deep · 62 km away
  26. 1.65 km NE of Ukiah, California · 15777 days ago · 6 km deep · 54 km away
  27. 1.97 km WSW of Cobb, California · 15777 days ago · 1 km deep · 3 km away
  28. 2.06 km WSW of Cobb, California · 15777 days ago · 0 km deep · 3 km away
  29. 2.46 km W of Cobb, California · 15776 days ago · 2 km deep · 3 km away
  30. 1.86 km W of Cobb, California · 15775 days ago · 3 km deep · 2 km away
  31. 1.86 km W of Cobb, California · 15775 days ago · 3 km deep · 2 km away
  32. 1.97 km W of Cobb, California · 15774 days ago · 3 km deep · 3 km away
  33. 1.65 km W of Cobb, California · 15774 days ago · -1 km deep · 1 km away
  34. 1.76 km W of Cobb, California · 15774 days ago · 1 km deep · 2 km away
  35. 1.69 km SW of Kelseyville, California · 15774 days ago · 11 km deep · 18 km away
  36. 1.69 km ESE of Hidden Valley Lake, California · 15773 days ago · 6 km deep · 28 km away
  37. 1.68 km W of Calistoga, California · 15773 days ago · 7 km deep · 27 km away
  38. 2.65 km SW of Cobb, California · 15773 days ago · 0 km deep · 3 km away
  39. 2.55 km SW of Cobb, California · 15773 days ago · -1 km deep · 2 km away
  40. 1.68 km WSW of Cobb, California · 15772 days ago · 1 km deep · 4 km away
  41. 1.96 km WSW of Cobb, California · 15772 days ago · 2 km deep · 2 km away
  42. 1.910 km NE of Cazadero, California · 15772 days ago · 1 km deep · 31 km away
  43. 1.67 km W of Cobb, California · 15772 days ago · 0 km deep · 3 km away
  44. 1.97 km W of Cobb, California · 15771 days ago · 3 km deep · 3 km away
  45. 2.99 km E of Hidden Valley Lake, California · 15771 days ago · 8 km deep · 28 km away
  46. 1.59 km NW of Redwood Valley, California · 15771 days ago · 6 km deep · 72 km away
  47. 1.95 km NNE of Cobb, California · 15770 days ago · 1 km deep · 9 km away
  48. 1.85 km WSW of Cobb, California · 15770 days ago · 0 km deep · 2 km away
  49. 2.27 km W of Cobb, California · 15770 days ago · 3 km deep · 3 km away
  50. 1.67 km WSW of Cobb, California · 15770 days ago · 3 km deep · 3 km away
  51. 2.36 km ESE of Santa Rosa, California · 15770 days ago · 0 km deep · 45 km away
  52. 2.17 km WSW of Cobb, California · 15768 days ago · 2 km deep · 3 km away
  53. 1.914 km N of Potter Valley, California · 15767 days ago · 8 km deep · 77 km away
  54. 2.57 km W of Cobb, California · 15767 days ago · 3 km deep · 3 km away
  55. 1.67 km W of Cobb, California · 15767 days ago · 3 km deep · 3 km away
  56. 1.66 km WSW of Cobb, California · 15767 days ago · 4 km deep · 2 km away
  57. 1.67 km ENE of Brooktrails, California · 15766 days ago · 8 km deep · 87 km away
  58. 2.16 km W of Cobb, California · 15766 days ago · 1 km deep · 2 km away
  59. 1.78 km NW of Redwood Valley, California · 15766 days ago · 5 km deep · 71 km away
  60. 3.15 km SW of Cobb, California · 15765 days ago · 0 km deep · 3 km away

The first 60 of 169.

Before

  1. 2.77 km W of Cobb, California · 15785 days ago · 3 km deep · 3 km away
  2. 1.62 km SE of Redwood Valley, California · 15786 days ago · 6 km deep · 60 km away
  3. 1.54 km SSE of Kelseyville, California · 15786 days ago · 2 km deep · 15 km away
  4. 1.818 km ENE of Potter Valley, California · 15786 days ago · 0 km deep · 63 km away
  5. 2.35 km ESE of Manchester, California · 15787 days ago · 2 km deep · 75 km away
  6. 1.75 km WSW of Moskowite Corner, California · 15787 days ago · 14 km deep · 63 km away
  7. 1.519 km ENE of Potter Valley, California · 15787 days ago · 9 km deep · 64 km away
  8. 1.818 km ENE of Potter Valley, California · 15787 days ago · 5 km deep · 63 km away
  9. 3.62 km SSE of Point Arena, California · 15787 days ago · 10 km deep · 78 km away
  10. 1.818 km ENE of Potter Valley, California · 15787 days ago · 7 km deep · 64 km away
  11. 2.020 km NNE of Upper Lake, California · 15788 days ago · 5 km deep · 58 km away
  12. 1.611 km ENE of Hidden Valley Lake, California · 15789 days ago · 8 km deep · 30 km away
  13. 1.56 km NE of Rohnert Park, California · 15789 days ago · 4 km deep · 50 km away
  14. 1.96 km WSW of Cobb, California · 15789 days ago · 1 km deep · 2 km away
  15. 1.816 km ENE of Potter Valley, California · 15790 days ago · 10 km deep · 66 km away
  16. 2.27 km W of Cobb, California · 15790 days ago · 2 km deep · 3 km away
  17. 1.86 km W of Cobb, California · 15790 days ago · 1 km deep · 2 km away
  18. 1.54 km NW of Redwood Valley, California · 15790 days ago · 6 km deep · 68 km away
  19. 1.522 km WNW of Elk Creek, California · 15790 days ago · 4 km deep · 93 km away
  20. 2.222 km W of Elk Creek, California · 15790 days ago · 4 km deep · 92 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1098760. Read Sun, Oct 4, 2026, 7:47 PM UTC.