California earthquakes

M1.8 earthquake 2 km NE of Ukiah, California

A magnitude 1.8 earthquake struck 2 km NE of Ukiah, California on Sat, Apr 18, 1981, 6:30 AM PST (14:30 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M2.9 6 km W of Cobb, California. This one was a foreshock.

Ukiah 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
1.8 (md), micro
Local time
UTC
1981-04-18 14:30:56 UTC
Depth
7.7 km (4.8 mi), shallow
Epicenter
39.168° N, 123.183° 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, 0.9 km in depth
Magnitude uncertainty
±0.25
Depth from
From location
Station coverage gap
68°
Stations used
17

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 125 in the 60 days after this one and 60 in the 30 days before it.

After

  1. 1.715 km W of Calpella, California · 16593 days ago · 4 km deep · 19 km away
  2. 2.96 km W of Cobb, California · 16592 days ago · 3 km deep · 52 km away
  3. 1.84 km E of Clear Lake Riviera, California · 16592 days ago · 0 km deep · 50 km away
  4. 2.33 km E of Laytonville, California · 16591 days ago · 5 km deep · 62 km away
  5. 1.87 km W of Cobb, California · 16590 days ago · 1 km deep · 50 km away
  6. 1.611 km NE of Healdsburg, California · 16589 days ago · 5 km deep · 66 km away
  7. 1.86 km W of Cobb, California · 16588 days ago · 2 km deep · 52 km away
  8. 2.34 km WSW of Cobb, California · 16588 days ago · 2 km deep · 54 km away
  9. 1.64 km WSW of Cobb, California · 16588 days ago · 2 km deep · 54 km away
  10. 1.76 km W of Cobb, California · 16587 days ago · 4 km deep · 51 km away
  11. 1.79 km WSW of Cobb, California · 16585 days ago · 2 km deep · 51 km away
  12. 2.16 km WSW of Cobb, California · 16585 days ago · 1 km deep · 54 km away
  13. 1.86 km WSW of Cobb, California · 16585 days ago · 1 km deep · 54 km away
  14. 2.18 km E of Hidden Valley Lake, California · 16585 days ago · 7 km deep · 75 km away
  15. 1.95 km WNW of Laytonville, California · 16583 days ago · 2 km deep · 68 km away
  16. 1.66 km WSW of Cobb, California · 16582 days ago · 0 km deep · 53 km away
  17. 2.95 km SW of Cobb, California · 16582 days ago · 0 km deep · 55 km away
  18. 1.85 km SW of Cobb, California · 16582 days ago · 0 km deep · 55 km away
  19. 1.56 km W of Cobb, California · 16581 days ago · 4 km deep · 52 km away
  20. 1.910 km ESE of Willits, California · 16580 days ago · 6 km deep · 23 km away
  21. 1.66 km WSW of Cobb, California · 16580 days ago · 0 km deep · 53 km away
  22. 1.612 km S of Guinda, California · 16580 days ago · 4 km deep · 100 km away
  23. 1.5near the coast of Northern California · 16580 days ago · 7 km deep · 29 km away
  24. 1.89 km WSW of Cobb, California · 16579 days ago · 2 km deep · 51 km away
  25. 1.917 km ENE of Willits, California · 16579 days ago · 6 km deep · 36 km away
  26. 2.26 km WSW of Cobb, California · 16577 days ago · -1 km deep · 52 km away
  27. 1.94 km WSW of Cobb, California · 16577 days ago · 1 km deep · 54 km away
  28. 1.69 km NE of Cloverdale, California · 16577 days ago · 3 km deep · 38 km away
  29. 1.88 km W of Cobb, California · 16576 days ago · 1 km deep · 50 km away
  30. 2.18 km W of Cobb, California · 16576 days ago · 0 km deep · 50 km away
  31. 1.611 km W of Cobb, California · 16576 days ago · -1 km deep · 47 km away
  32. 1.78 km WSW of Cobb, California · 16575 days ago · 4 km deep · 52 km away
  33. 1.925 km SE of Covelo, California · 16575 days ago · 5 km deep · 50 km away
  34. 1.63 km ESE of Calpella, California · 16575 days ago · 3 km deep · 6 km away
  35. 1.59 km N of Cloverdale, California · 16574 days ago · 2 km deep · 34 km away
  36. 1.97 km S of Calistoga, California · 16573 days ago · 8 km deep · 90 km away
  37. 3.27 km SW of Artois, California · 16573 days ago · 19 km deep · 91 km away
  38. 2.59 km W of Cobb, California · 16573 days ago · 1 km deep · 50 km away
  39. 1.54 km WSW of Cobb, California · 16573 days ago · 2 km deep · 54 km away
  40. 2.110 km NNE of Covelo, California · 16573 days ago · 9 km deep · 80 km away
  41. 2.66 km WSW of Cobb, California · 16573 days ago · 1 km deep · 53 km away
  42. 2.57 km SW of Calistoga, California · 16572 days ago · 6 km deep · 85 km away
  43. 1.65 km NNE of Clearlake, California · 16572 days ago · 1 km deep · 54 km away
  44. 1.78 km ESE of Willits, California · 16572 days ago · 1 km deep · 24 km away
  45. 1.817 km NNE of Upper Lake, California · 16571 days ago · 13 km deep · 34 km away
  46. 1.913 km WSW of Maxwell, California · 16571 days ago · -1 km deep · 74 km away
  47. 1.714 km NNE of Clearlake Oaks, California · 16571 days ago · 8 km deep · 48 km away
  48. 3.06 km WSW of Lower Lake, California · 16570 days ago · 5 km deep · 53 km away
  49. 2.018 km NE of Upper Lake, California · 16570 days ago · 7 km deep · 38 km away
  50. 1.61 km SE of Clearlake, California · 16570 days ago · 11 km deep · 55 km away
  51. 1.612 km SE of Hidden Valley Lake, California · 16570 days ago · 8 km deep · 80 km away
  52. 2.36 km W of Cobb, California · 16570 days ago · 3 km deep · 51 km away
  53. 1.62 km NE of Potter Valley, California · 16570 days ago · 4 km deep · 20 km away
  54. 1.77 km N of Hopland, California · 16570 days ago · 6 km deep · 16 km away
  55. 1.75 km WSW of Lower Lake, California · 16569 days ago · 4 km deep · 54 km away
  56. 1.916 km WSW of Williams, California · 16569 days ago · 2 km deep · 74 km away
  57. 2.16 km NE of Hidden Valley Lake, California · 16568 days ago · 57 km deep · 69 km away
  58. 2.011 km E of Geyserville, California · 16568 days ago · 6 km deep · 63 km away
  59. 1.86 km ENE of Brooktrails, California · 16568 days ago · 7 km deep · 35 km away
  60. 2.314 km S of Guinda, California · 16567 days ago · 4 km deep · 98 km away

The first 60 of 125.

Before

  1. 2.61 km NNW of Ukiah, California · 16594 days ago · 4 km deep · 3 km away
  2. 2.33 km ESE of Talmage, California · 16594 days ago · 5 km deep · 7 km away
  3. 2.028 km NNE of Potter Valley, California · 16594 days ago · 14 km deep · 46 km away
  4. 2.821 km NNE of Potter Valley, California · 16596 days ago · 8 km deep · 39 km away
  5. 1.69 km WSW of Cobb, California · 16596 days ago · 2 km deep · 51 km away
  6. 2.66 km NW of Laytonville, California · 16596 days ago · 7 km deep · 69 km away
  7. 1.821 km NNE of Potter Valley, California · 16596 days ago · 8 km deep · 39 km away
  8. 2.29 km WSW of Cobb, California · 16597 days ago · 2 km deep · 51 km away
  9. 2.27 km WSW of Cobb, California · 16597 days ago · 1 km deep · 52 km away
  10. 2.36 km WSW of Cobb, California · 16597 days ago · 1 km deep · 52 km away
  11. 2.120 km ENE of Brooktrails, California · 16597 days ago · 8 km deep · 40 km away
  12. 2.031 km WSW of Paskenta, California · 16598 days ago · 4 km deep · 70 km away
  13. 1.89 km NE of Brooktrails, California · 16598 days ago · 8 km deep · 38 km away
  14. 2.1near the coast of Northern California · 16598 days ago · 5 km deep · 79 km away
  15. 1.9near the coast of Northern California · 16598 days ago · 10 km deep · 37 km away
  16. 2.417 km NE of Nice, California · 16599 days ago · 8 km deep · 41 km away
  17. 1.76 km WSW of Cobb, California · 16600 days ago · 3 km deep · 52 km away
  18. 1.96 km W of Cobb, California · 16601 days ago · 4 km deep · 51 km away
  19. 2.76 km W of Cobb, California · 16601 days ago · 3 km deep · 52 km away
  20. 2.27 km WSW of Cobb, California · 16602 days ago · 2 km deep · 52 km away

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1062690. Read Tue, Sep 22, 2026, 9:33 PM UTC.