California earthquakes

M1.6 earthquake 1 km ENE of Alamo, California

A magnitude 1.6 earthquake struck 1 km ENE of Alamo, California on Fri, Nov 30, 1990, 12:30 PM PST (20:30 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M2.8 2 km NNE of San Leandro, California. This one was a foreshock.

Alamo 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
1990-11-30 20:30:36 UTC
Depth
6.2 km (3.8 mi), shallow
Epicenter
37.853° N, 122.017° 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, 0.3 km in depth
Magnitude uncertainty
±0.08
Depth from
From location
Station coverage gap
69°
Stations used
20

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 59 in the 60 days after this one and 41 in the 30 days before it.

After

  1. 1.75 km ESE of Seven Trees, California · 13091 days ago · 0 km deep · 69 km away
  2. 1.814 km N of Morgan Hill, California · 13090 days ago · 5 km deep · 74 km away
  3. 2.41 km ENE of Alamo, California · 13090 days ago · 7 km deep · 0 km away
  4. 1.55 km SW of Davenport, California · 13090 days ago · 5 km deep · 99 km away
  5. 1.83 km NNW of Seacliff, California · 13090 days ago · 4 km deep · 95 km away
  6. 1.62 km SSW of Green Valley, California · 13089 days ago · 11 km deep · 44 km away
  7. 1.66 km NE of Day Valley, California · 13088 days ago · 7 km deep · 89 km away
  8. 1.66 km NE of Day Valley, California · 13087 days ago · 7 km deep · 89 km away
  9. 1.62 km SSW of Davenport, California · 13087 days ago · 12 km deep · 98 km away
  10. 1.92 km SSW of Davenport, California · 13087 days ago · 11 km deep · 98 km away
  11. 1.86 km WSW of Glen Ellen, California · 13081 days ago · 9 km deep · 73 km away
  12. 1.63 km ESE of Union City, California · 13080 days ago · 3 km deep · 30 km away
  13. 2.52 km ENE of Pacheco, California · 13080 days ago · 16 km deep · 16 km away
  14. 2.31 km ENE of Alamo, California · 13080 days ago · 7 km deep · 0 km away
  15. 2.010 km ESE of East Foothills, California · 13080 days ago · 7 km deep · 63 km away
  16. 1.51 km E of Alamo, California · 13079 days ago · 7 km deep · 0 km away
  17. 1.71 km E of Alamo, California · 13079 days ago · 6 km deep · 0 km away
  18. 2.71 km ENE of Alamo, California · 13079 days ago · 7 km deep · 0 km away
  19. 1.611 km ESE of East Foothills, California · 13076 days ago · 7 km deep · 64 km away
  20. 1.611 km ESE of East Foothills, California · 13076 days ago · 7 km deep · 64 km away
  21. 1.82 km NNE of Day Valley, California · 13074 days ago · 12 km deep · 90 km away
  22. 1.80 km SE of Larkfield-Wikiup, California · 13072 days ago · 2 km deep · 97 km away
  23. 2.813 km N of Morgan Hill, California · 13071 days ago · 4 km deep · 75 km away
  24. 1.99 km NW of Daly City, California · 13071 days ago · 12 km deep · 48 km away
  25. 2.41 km N of Pleasant Hill, California · 13070 days ago · 9 km deep · 13 km away
  26. 1.613 km N of Morgan Hill, California · 13069 days ago · 3 km deep · 75 km away
  27. 2.76 km E of East Foothills, California · 13068 days ago · 5 km deep · 57 km away
  28. 1.61 km S of Los Altos Hills, California · 13068 days ago · 5 km deep · 55 km away
  29. 1.89 km E of San Martin, California · 13068 days ago · 8 km deep · 97 km away
  30. 1.82 km W of Monte Sereno, California · 13063 days ago · 8 km deep · 69 km away
  31. 2.213 km N of Morgan Hill, California · 13062 days ago · 4 km deep · 75 km away
  32. 1.915 km SSE of Livermore, California · 13062 days ago · 8 km deep · 44 km away
  33. 2.112 km ESE of East Foothills, California · 13061 days ago · 6 km deep · 65 km away
  34. 2.18 km NE of Milpitas, California · 13060 days ago · 8 km deep · 45 km away
  35. 1.67 km NNW of Day Valley, California · 13057 days ago · 12 km deep · 85 km away
  36. 1.53 km ENE of Santa Rosa, California · 13056 days ago · 9 km deep · 88 km away
  37. 1.91 km W of American Canyon, California · 13054 days ago · 3 km deep · 42 km away
  38. 2.16 km E of East Foothills, California · 13053 days ago · 6 km deep · 57 km away
  39. 1.53 km E of Corralitos, California · 13053 days ago · 14 km deep · 98 km away
  40. 1.913 km N of Morgan Hill, California · 13050 days ago · 3 km deep · 75 km away
  41. 1.73 km SSW of Saratoga, California · 13050 days ago · 8 km deep · 68 km away
  42. 1.513 km N of Morgan Hill, California · 13049 days ago · 3 km deep · 75 km away
  43. 1.57 km ENE of Larkfield-Wikiup, California · 13047 days ago · 23 km deep · 95 km away
  44. 2.112 km W of Davenport, California · 13045 days ago · 8 km deep · 98 km away
  45. 1.711 km W of Davenport, California · 13045 days ago · 6 km deep · 98 km away
  46. 1.96 km SW of Calistoga, California · 13045 days ago · 6 km deep · 92 km away
  47. 2.48 km ENE of Milpitas, California · 13044 days ago · 6 km deep · 47 km away
  48. 1.812 km NNE of Angwin, California · 13043 days ago · 6 km deep · 98 km away
  49. 2.82 km NNE of San Leandro, California · 13043 days ago · 4 km deep · 16 km away
  50. 1.83 km SE of Pittsburg, California · 13042 days ago · 17 km deep · 21 km away
  51. 1.61 km W of Cambrian Park, California · 13042 days ago · 3 km deep · 67 km away
  52. 2.413 km WNW of Rio Vista, California · 13041 days ago · 17 km deep · 45 km away
  53. 2.29 km ESE of East Foothills, California · 13040 days ago · 7 km deep · 62 km away
  54. 1.83 km E of Berkeley, California · 13040 days ago · 10 km deep · 19 km away
  55. 2.36 km W of Glen Ellen, California · 13037 days ago · 2 km deep · 76 km away
  56. 2.46 km W of Glen Ellen, California · 13037 days ago · 3 km deep · 76 km away
  57. 2.120 km ESE of East Foothills, California · 13035 days ago · 5 km deep · 70 km away
  58. 1.58 km W of Calistoga, California · 13033 days ago · 6 km deep · 99 km away
  59. 2.113 km SE of Sunol, California · 13032 days ago · 4 km deep · 44 km away

Before

  1. 1.81 km NE of Ashland, California · 13092 days ago · 5 km deep · 18 km away
  2. 1.918 km SSE of Livermore, California · 13092 days ago · 6 km deep · 47 km away
  3. 1.76 km SE of Seven Trees, California · 13093 days ago · 1 km deep · 70 km away
  4. 1.93 km NNW of Seacliff, California · 13094 days ago · 4 km deep · 95 km away
  5. 1.712 km N of Morgan Hill, California · 13095 days ago · 3 km deep · 76 km away
  6. 2.01 km ENE of Alamo, California · 13096 days ago · 7 km deep · 0 km away
  7. 3.211 km NNE of Morgan Hill, California · 13097 days ago · 5 km deep · 78 km away
  8. 2.41 km ENE of Alamo, California · 13097 days ago · 7 km deep · 0 km away
  9. 1.67 km N of Day Valley, California · 13098 days ago · 5 km deep · 85 km away
  10. 1.910 km ESE of East Foothills, California · 13099 days ago · 7 km deep · 63 km away
  11. 1.715 km W of Davenport, California · 13099 days ago · 11 km deep · 98 km away
  12. 1.69 km WNW of American Canyon, California · 13100 days ago · 8 km deep · 51 km away
  13. 1.64 km WSW of Kenwood, California · 13102 days ago · 7 km deep · 79 km away
  14. 1.69 km NE of San Martin, California · 13102 days ago · 8 km deep · 89 km away
  15. 1.71 km SSE of Saratoga, California · 13102 days ago · 5 km deep · 67 km away
  16. 1.66 km SE of Seven Trees, California · 13103 days ago · 1 km deep · 70 km away
  17. 2.83 km W of Roseland, California · 13106 days ago · 6 km deep · 92 km away
  18. 2.48 km ESE of East Foothills, California · 13107 days ago · 7 km deep · 60 km away
  19. 1.73 km SW of Broadmoor, California · 13107 days ago · 8 km deep · 48 km away
  20. 2.13 km N of Lexington Hills, California · 13107 days ago · 4 km deep · 74 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc201539. Read Sun, Oct 4, 2026, 4:31 PM UTC.