California earthquakes

M1.5 earthquake 5 km SW of Cobb, California

A magnitude 1.5 earthquake struck 5 km SW of Cobb, California on Fri, Feb 18, 1983, 5:17 PM PST (01:17 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M1.6 23 km NE 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.

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The earthquake

Magnitude
1.5 (md), micro
Local time
UTC
1983-02-19 01:17:21 UTC
Depth
2.9 km (1.8 mi), shallow
Epicenter
38.787° N, 122.774° 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 0.4 km horizontally, 0.7 km in depth
Magnitude uncertainty
±0.16
Depth from
From location
Station coverage gap
125°
Stations used
10

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 158 in the 60 days after this one and 15 in the 30 days before it.

After

  1. 1.623 km NE of Potter Valley, California · 15921 days ago · 8 km deep · 80 km away
  2. 2.47 km W of Cobb, California · 15921 days ago · 4 km deep · 4 km away
  3. 1.96 km W of Cobb, California · 15920 days ago · 3 km deep · 5 km away
  4. 2.67 km W of Cobb, California · 15920 days ago · 3 km deep · 4 km away
  5. 1.57 km W of Cobb, California · 15920 days ago · 0 km deep · 5 km away
  6. 2.07 km W of Cobb, California · 15920 days ago · 3 km deep · 4 km away
  7. 2.411 km ENE of Comptche, California · 15920 days ago · -1 km deep · 82 km away
  8. 3.01 km SE of Calpella, California · 15919 days ago · 5 km deep · 60 km away
  9. 1.61 km SE of Calpella, California · 15919 days ago · 4 km deep · 60 km away
  10. 1.96 km WSW of Cobb, California · 15918 days ago · 2 km deep · 3 km away
  11. 1.77 km WSW of Cobb, California · 15916 days ago · 2 km deep · 3 km away
  12. 1.62 km NNE of Larkfield-Wikiup, California · 15915 days ago · 8 km deep · 28 km away
  13. 1.923 km NE of Potter Valley, California · 15915 days ago · 10 km deep · 80 km away
  14. 1.524 km NE of Potter Valley, California · 15915 days ago · 10 km deep · 79 km away
  15. 2.05 km S of Calistoga, California · 15914 days ago · 6 km deep · 33 km away
  16. 3.05 km WSW of Cobb, California · 15914 days ago · -1 km deep · 2 km away
  17. 1.76 km W of Cobb, California · 15914 days ago · 2 km deep · 4 km away
  18. 2.05 km WSW of Cobb, California · 15914 days ago · 0 km deep · 2 km away
  19. 2.07 km WSW of Cobb, California · 15913 days ago · 0 km deep · 4 km away
  20. 1.73 km NNW of Santa Rosa, California · 15913 days ago · 7 km deep · 35 km away
  21. 2.08 km WSW of Cobb, California · 15912 days ago · 0 km deep · 4 km away
  22. 2.46 km W of Cobb, California · 15912 days ago · 3 km deep · 4 km away
  23. 1.66 km WSW of Cobb, California · 15911 days ago · 2 km deep · 3 km away
  24. 1.67 km NE of Cloverdale, California · 15911 days ago · 3 km deep · 18 km away
  25. 2.43 km NNW of Larkfield-Wikiup, California · 15911 days ago · 5 km deep · 27 km away
  26. 1.66 km ESE of Santa Rosa, California · 15911 days ago · 6 km deep · 41 km away
  27. 1.56 km WSW of Cobb, California · 15909 days ago · 0 km deep · 3 km away
  28. 1.63 km ESE of Roseland, California · 15909 days ago · 6 km deep · 43 km away
  29. 2.46 km W of Cobb, California · 15908 days ago · 3 km deep · 5 km away
  30. 1.77 km WSW of Cobb, California · 15908 days ago · 1 km deep · 3 km away
  31. 1.76 km W of Cobb, California · 15908 days ago · 3 km deep · 4 km away
  32. 2.66 km W of Cobb, California · 15908 days ago · 3 km deep · 4 km away
  33. 1.57 km WSW of Cobb, California · 15908 days ago · 3 km deep · 3 km away
  34. 1.620 km ENE of Potter Valley, California · 15908 days ago · 10 km deep · 69 km away
  35. 1.620 km ENE of Potter Valley, California · 15908 days ago · 11 km deep · 69 km away
  36. 1.88 km WSW of Cobb, California · 15907 days ago · 3 km deep · 4 km away
  37. 1.77 km WSW of Cobb, California · 15907 days ago · 0 km deep · 3 km away
  38. 2.17 km WSW of Cobb, California · 15907 days ago · 4 km deep · 3 km away
  39. 1.910 km NNE of Cloverdale, California · 15906 days ago · -1 km deep · 22 km away
  40. 1.58 km WSW of Cobb, California · 15906 days ago · 2 km deep · 4 km away
  41. 2.910 km ESE of Hidden Valley Lake, California · 15906 days ago · 8 km deep · 28 km away
  42. 2.210 km ESE of Hidden Valley Lake, California · 15906 days ago · 6 km deep · 29 km away
  43. 2.14 km WSW of Cobb, California · 15906 days ago · 1 km deep · 2 km away
  44. 1.610 km ESE of Hidden Valley Lake, California · 15906 days ago · 6 km deep · 28 km away
  45. 2.39 km ESE of Hidden Valley Lake, California · 15906 days ago · 7 km deep · 28 km away
  46. 2.57 km W of Cobb, California · 15904 days ago · 3 km deep · 4 km away
  47. 2.37 km WSW of Cobb, California · 15903 days ago · 6 km deep · 3 km away
  48. 3.07 km WSW of Cobb, California · 15903 days ago · 4 km deep · 4 km away
  49. 1.67 km W of Cobb, California · 15902 days ago · 3 km deep · 4 km away
  50. 1.97 km NNE of Clearlake, California · 15902 days ago · -1 km deep · 30 km away
  51. 2.47 km E of Clearlake Oaks, California · 15902 days ago · -1 km deep · 31 km away
  52. 1.96 km W of Cobb, California · 15901 days ago · 3 km deep · 4 km away
  53. 1.86 km W of Cobb, California · 15901 days ago · 1 km deep · 4 km away
  54. 1.66 km W of Cobb, California · 15901 days ago · 4 km deep · 4 km away
  55. 1.77 km NE of Clearlake, California · 15901 days ago · -1 km deep · 30 km away
  56. 3.06 km W of Cobb, California · 15900 days ago · 3 km deep · 4 km away
  57. 1.87 km WSW of Cobb, California · 15900 days ago · 1 km deep · 3 km away
  58. 1.79 km NE of Hidden Valley Lake, California · 15900 days ago · 4 km deep · 27 km away
  59. 2.56 km WSW of Cobb, California · 15900 days ago · 3 km deep · 3 km away
  60. 2.07 km W of Cobb, California · 15900 days ago · 3 km deep · 4 km away

The first 60 of 158.

Before

  1. 1.75 km SSW of Calistoga, California · 15922 days ago · 4 km deep · 31 km away
  2. 2.07 km E of Larkfield-Wikiup, California · 15922 days ago · 5 km deep · 32 km away
  3. 1.87 km W of Cobb, California · 15922 days ago · 3 km deep · 4 km away
  4. 1.98 km WSW of Cobb, California · 15922 days ago · 3 km deep · 4 km away
  5. 1.53 km N of Healdsburg, California · 15923 days ago · 3 km deep · 18 km away
  6. 1.723 km NE of Potter Valley, California · 15923 days ago · 9 km deep · 77 km away
  7. 1.63 km WSW of Cobb, California · 15924 days ago · 1 km deep · 3 km away
  8. 1.79 km SE of Willits, California · 15924 days ago · 5 km deep · 77 km away
  9. 1.57 km WSW of Cobb, California · 15924 days ago · 2 km deep · 4 km away
  10. 1.87 km W of Cobb, California · 15924 days ago · 3 km deep · 5 km away
  11. 1.87 km W of Cobb, California · 15925 days ago · 3 km deep · 4 km away
  12. 2.56 km WSW of Cobb, California · 15925 days ago · 0 km deep · 2 km away
  13. 2.85 km SW of Cobb, California · 15927 days ago · -1 km deep · 1 km away
  14. 1.75 km SW of Cobb, California · 15927 days ago · 0 km deep · 0 km away
  15. 2.66 km W of Cobb, California · 15928 days ago · 0 km deep · 3 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1088030. Read Tue, Sep 22, 2026, 8:45 PM UTC.