California earthquakes

M1.6 earthquake 5 km WSW of Cobb, California

A magnitude 1.6 earthquake struck 5 km WSW of Cobb, California on Sat, Apr 30, 1988, 4:43 AM PDT (11:43 UTC), 1 km (0 mi) below the surface.

A larger quake followed: M3.6 7 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.

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The earthquake

Magnitude
1.6 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1988-04-30 11:43:11 UTC
Depth
0.7 km (0.4 mi), shallow
Epicenter
38.796° N, 122.778° 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, 0.4 km in depth
Magnitude uncertainty
±0.23
Depth from
From location
Station coverage gap
39°
Stations used
21

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 162 in the 60 days after this one and 70 in the 30 days before it.

After

  1. 1.56 km W of Cobb, California · 14035 days ago · 4 km deep · 3 km away
  2. 1.86 km SE of Santa Rosa, California · 14034 days ago · 8 km deep · 44 km away
  3. 1.68 km SE of Hopland, California · 14034 days ago · 1 km deep · 27 km away
  4. 1.95 km WSW of Cobb, California · 14034 days ago · 0 km deep · 0 km away
  5. 1.89 km WSW of Cobb, California · 14032 days ago · 2 km deep · 4 km away
  6. 1.59 km WSW of Cobb, California · 14032 days ago · 2 km deep · 4 km away
  7. 2.15 km WSW of Cobb, California · 14032 days ago · 3 km deep · 1 km away
  8. 1.54 km WSW of Cobb, California · 14031 days ago · 1 km deep · 1 km away
  9. 2.429 km SE of Covelo, California · 14030 days ago · 14 km deep · 93 km away
  10. 2.24 km N of Cobb, California · 14030 days ago · 2 km deep · 9 km away
  11. 2.68 km SE of Potter Valley, California · 14029 days ago · 4 km deep · 57 km away
  12. 1.85 km ESE of Potter Valley, California · 14029 days ago · 4 km deep · 61 km away
  13. 1.98 km ESE of Moskowite Corner, California · 14029 days ago · 5 km deep · 73 km away
  14. 2.52 km WSW of Clearlake Oaks, California · 14028 days ago · 2 km deep · 25 km away
  15. 2.34 km WSW of Cobb, California · 14028 days ago · 1 km deep · 1 km away
  16. 1.93 km SSW of Cobb, California · 14028 days ago · 1 km deep · 3 km away
  17. 2.19 km W of Cobb, California · 14028 days ago · -1 km deep · 6 km away
  18. 2.420 km W of Williams, California · 14027 days ago · 0 km deep · 50 km away
  19. 1.65 km E of Hidden Valley Lake, California · 14026 days ago · 5 km deep · 25 km away
  20. 1.94 km WNW of Cobb, California · 14026 days ago · 3 km deep · 4 km away
  21. 2.65 km W of Cobb, California · 14026 days ago · 0 km deep · 2 km away
  22. 2.84 km W of Cobb, California · 14025 days ago · 0 km deep · 3 km away
  23. 1.64 km W of Cobb, California · 14025 days ago · 0 km deep · 3 km away
  24. 2.415 km ESE of Comptche, California · 14024 days ago · 7 km deep · 73 km away
  25. 1.710 km SE of Hidden Valley Lake, California · 14024 days ago · 3 km deep · 28 km away
  26. 1.68 km ENE of Larkfield-Wikiup, California · 14023 days ago · 5 km deep · 30 km away
  27. 2.06 km W of Cobb, California · 14023 days ago · 4 km deep · 4 km away
  28. 1.96 km W of Cobb, California · 14023 days ago · 3 km deep · 4 km away
  29. 1.67 km WSW of Cobb, California · 14022 days ago · 3 km deep · 3 km away
  30. 1.94 km SE of Larkfield-Wikiup, California · 14022 days ago · 5 km deep · 35 km away
  31. 2.24 km WSW of Cobb, California · 14022 days ago · 1 km deep · 1 km away
  32. 1.76 km N of Geyserville, California · 14022 days ago · 4 km deep · 12 km away
  33. 2.16 km WNW of Cobb, California · 14021 days ago · -1 km deep · 4 km away
  34. 1.75 km W of Cobb, California · 14021 days ago · 0 km deep · 3 km away
  35. 1.86 km WSW of Cobb, California · 14021 days ago · 0 km deep · 1 km away
  36. 1.95 km NNW of Cloverdale, California · 14021 days ago · 1 km deep · 24 km away
  37. 1.65 km WNW of Cobb, California · 14021 days ago · 0 km deep · 5 km away
  38. 2.021 km ENE of Potter Valley, California · 14021 days ago · 9 km deep · 64 km away
  39. 1.79 km WNW of Cobb, California · 14021 days ago · 1 km deep · 8 km away
  40. 1.821 km ENE of Potter Valley, California · 14020 days ago · 9 km deep · 64 km away
  41. 1.96 km SW of Cobb, California · 14020 days ago · 3 km deep · 1 km away
  42. 2.34 km W of Cobb, California · 14019 days ago · 2 km deep · 3 km away
  43. 1.77 km W of Cobb, California · 14019 days ago · 3 km deep · 4 km away
  44. 1.710 km W of Cobb, California · 14019 days ago · 1 km deep · 6 km away
  45. 1.87 km WSW of Cobb, California · 14019 days ago · 0 km deep · 2 km away
  46. 3.47 km WSW of Cobb, California · 14019 days ago · 0 km deep · 2 km away
  47. 1.79 km W of Cobb, California · 14019 days ago · 1 km deep · 5 km away
  48. 1.78 km W of Cobb, California · 14019 days ago · 1 km deep · 4 km away
  49. 1.77 km W of Cobb, California · 14019 days ago · 1 km deep · 3 km away
  50. 1.96 km SW of Cobb, California · 14018 days ago · 2 km deep · 1 km away
  51. 1.818 km ENE of Potter Valley, California · 14018 days ago · 6 km deep · 67 km away
  52. 1.76 km W of Cobb, California · 14018 days ago · 1 km deep · 4 km away
  53. 1.510 km WSW of Cobb, California · 14018 days ago · 2 km deep · 6 km away
  54. 2.16 km W of Cobb, California · 14018 days ago · 3 km deep · 3 km away
  55. 1.94 km NNW of Cloverdale, California · 14017 days ago · 0 km deep · 23 km away
  56. 1.57 km SW of Cobb, California · 14017 days ago · -1 km deep · 2 km away
  57. 2.65 km WNW of Cobb, California · 14017 days ago · 2 km deep · 5 km away
  58. 2.28 km WSW of Cobb, California · 14016 days ago · 2 km deep · 4 km away
  59. 2.515 km NNW of Potter Valley, California · 14016 days ago · 3 km deep · 80 km away
  60. 2.36 km W of Cobb, California · 14016 days ago · 3 km deep · 3 km away

The first 60 of 162.

Before

  1. 2.28 km WSW of Cobb, California · 14035 days ago · 3 km deep · 3 km away
  2. 1.66 km W of Cobb, California · 14035 days ago · 4 km deep · 3 km away
  3. 1.67 km ENE of Larkfield-Wikiup, California · 14036 days ago · 1 km deep · 29 km away
  4. 2.37 km ENE of Larkfield-Wikiup, California · 14036 days ago · 2 km deep · 29 km away
  5. 3.05 km SW of Cobb, California · 14037 days ago · 2 km deep · 1 km away
  6. 1.95 km W of Cobb, California · 14037 days ago · 0 km deep · 2 km away
  7. 1.98 km ESE of Hidden Valley Lake, California · 14037 days ago · 6 km deep · 28 km away
  8. 1.64 km SSW of Cobb, California · 14037 days ago · 1 km deep · 2 km away
  9. 1.66 km W of Cobb, California · 14038 days ago · -1 km deep · 4 km away
  10. 1.86 km WSW of Cobb, California · 14038 days ago · 3 km deep · 2 km away
  11. 1.65 km WNW of Cobb, California · 14038 days ago · 3 km deep · 5 km away
  12. 1.68 km W of Cobb, California · 14039 days ago · 1 km deep · 6 km away
  13. 2.16 km W of Cobb, California · 14039 days ago · 3 km deep · 3 km away
  14. 2.05 km SSW of Cobb, California · 14039 days ago · 1 km deep · 3 km away
  15. 1.95 km ENE of Rohnert Park, California · 14039 days ago · 6 km deep · 51 km away
  16. 1.610 km N of Cloverdale, California · 14040 days ago · 3 km deep · 22 km away
  17. 2.48 km WSW of Hopland, California · 14042 days ago · 5 km deep · 41 km away
  18. 2.07 km W of Cobb, California · 14042 days ago · 3 km deep · 4 km away
  19. 1.58 km W of Cobb, California · 14042 days ago · 2 km deep · 6 km away
  20. 2.16 km WSW of Cobb, California · 14043 days ago · 3 km deep · 2 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc116608. Read Fri, Oct 2, 2026, 11:45 PM UTC.