California earthquakes

M1.5 earthquake Central California

A magnitude 1.5 earthquake struck in Central California on Sat, Apr 20, 1991, 10:39 AM PDT (17:39 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.1 23 km NNE of San Ardo, California. This one was a foreshock.

Coalinga 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, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1991-04-20 17:39:52 UTC
Depth
9.7 km (6.0 mi), shallow
Epicenter
36.108° N, 120.267° 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, 1.1 km in depth
Magnitude uncertainty
±0.03
Depth from
From location
Station coverage gap
130°
Stations used
13

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 87 in the 60 days after this one and 69 in the 30 days before it.

After

  1. 2.421 km NE of Soledad, California · 12951 days ago · 5 km deep · 92 km away
  2. 1.512 km NNE of Shandon, California · 12951 days ago · 8 km deep · 40 km away
  3. 1.85 km SE of Coalinga, California · 12951 days ago · 10 km deep · 4 km away
  4. 2.022 km ENE of Soledad, California · 12950 days ago · 2 km deep · 89 km away
  5. 2.43 km SSW of Cayucos, California · 12948 days ago · 3 km deep · 97 km away
  6. 1.521 km NE of Soledad, California · 12947 days ago · 7 km deep · 92 km away
  7. 2.321 km NE of Soledad, California · 12947 days ago · 3 km deep · 95 km away
  8. 2.522 km ENE of Soledad, California · 12946 days ago · 3 km deep · 90 km away
  9. 1.711 km NW of Parkfield, California · 12946 days ago · 10 km deep · 27 km away
  10. 1.722 km NE of San Ardo, California · 12944 days ago · 7 km deep · 45 km away
  11. 1.823 km NE of King City, California · 12944 days ago · 4 km deep · 66 km away
  12. 1.64 km ESE of Coalinga, California · 12941 days ago · 11 km deep · 4 km away
  13. 1.713 km SSW of Lockwood, California · 12940 days ago · 8 km deep · 85 km away
  14. 1.522 km ENE of Soledad, California · 12940 days ago · 3 km deep · 89 km away
  15. 1.812 km W of Huron, California · 12939 days ago · 0 km deep · 10 km away
  16. 1.65 km ESE of Coalinga, California · 12937 days ago · 9 km deep · 3 km away
  17. 1.7Central California · 12936 days ago · 9 km deep · 4 km away
  18. 2.010 km NW of Parkfield, California · 12936 days ago · 10 km deep · 28 km away
  19. 1.67 km S of Huron, California · 12936 days ago · 8 km deep · 15 km away
  20. 1.621 km NE of Soledad, California · 12935 days ago · 2 km deep · 97 km away
  21. 2.021 km NW of Parkfield, California · 12935 days ago · 4 km deep · 30 km away
  22. 2.124 km ENE of Soledad, California · 12935 days ago · 3 km deep · 84 km away
  23. 2.05 km ESE of Coalinga, California · 12934 days ago · 9 km deep · 4 km away
  24. 2.16 km NW of Parkfield, California · 12933 days ago · 10 km deep · 27 km away
  25. 3.123 km NNE of San Ardo, California · 12931 days ago · 8 km deep · 45 km away
  26. 2.811 km E of Coalinga, California · 12930 days ago · 11 km deep · 6 km away
  27. 1.56 km NE of Coalinga, California · 12928 days ago · 7 km deep · 9 km away
  28. 1.521 km NNE of Soledad, California · 12928 days ago · 6 km deep · 99 km away
  29. 1.712 km N of Coalinga, California · 12928 days ago · 9 km deep · 18 km away
  30. 1.812 km N of Coalinga, California · 12927 days ago · 8 km deep · 18 km away
  31. 2.027 km NE of Soledad, California · 12927 days ago · 7 km deep · 93 km away
  32. 1.55 km SE of Coalinga, California · 12926 days ago · 8 km deep · 4 km away
  33. 1.76 km SE of Coalinga, California · 12926 days ago · 8 km deep · 4 km away
  34. 2.55 km ENE of Lemoore Station, California · 12925 days ago · 18 km deep · 42 km away
  35. 1.79 km SE of Coalinga, California · 12924 days ago · 9 km deep · 3 km away
  36. 1.811 km E of Coalinga, California · 12924 days ago · 6 km deep · 5 km away
  37. 1.622 km NNE of Soledad, California · 12923 days ago · 1 km deep · 100 km away
  38. 1.721 km NW of Parkfield, California · 12923 days ago · 4 km deep · 30 km away
  39. 1.923 km SW of South Dos Palos, California · 12921 days ago · 5 km deep · 92 km away
  40. 1.623 km ENE of Soledad, California · 12920 days ago · 8 km deep · 87 km away
  41. 2.323 km SE of Tres Pinos, California · 12920 days ago · 8 km deep · 98 km away
  42. 3.020 km WSW of Three Rocks, California · 12920 days ago · 12 km deep · 47 km away
  43. 1.620 km WSW of Three Rocks, California · 12919 days ago · 14 km deep · 47 km away
  44. 1.521 km NE of Soledad, California · 12919 days ago · 3 km deep · 95 km away
  45. 1.624 km NE of Soledad, California · 12916 days ago · 10 km deep · 93 km away
  46. 1.75 km ESE of Coalinga, California · 12915 days ago · 10 km deep · 4 km away
  47. 1.823 km NE of King City, California · 12914 days ago · 5 km deep · 66 km away
  48. 2.023 km NE of King City, California · 12914 days ago · 5 km deep · 66 km away
  49. 1.624 km NE of Soledad, California · 12914 days ago · 7 km deep · 96 km away
  50. 1.623 km ENE of Soledad, California · 12914 days ago · 4 km deep · 86 km away
  51. 2.017 km NNW of San Simeon, California · 12913 days ago · 3 km deep · 100 km away
  52. 2.310 km NE of San Simeon, California · 12913 days ago · 6 km deep · 88 km away
  53. 2.821 km NE of Soledad, California · 12913 days ago · 2 km deep · 97 km away
  54. 1.624 km ENE of Greenfield, California · 12913 days ago · 8 km deep · 75 km away
  55. 1.511km N of Delano, CA · 12913 days ago · 5 km deep · 97 km away
  56. 2.30 km W of Parkfield, California · 12912 days ago · 6 km deep · 28 km away
  57. 2.26 km SW of Atascadero, California · 12912 days ago · 4 km deep · 84 km away
  58. 1.622 km NE of Soledad, California · 12910 days ago · 2 km deep · 90 km away
  59. 1.78 km W of Huron, California · 12910 days ago · 5 km deep · 13 km away
  60. 1.89 km NNW of Avenal, California · 12907 days ago · 2 km deep · 8 km away

The first 60 of 87.

Before

  1. 1.624 km NE of Greenfield, California · 12953 days ago · 7 km deep · 82 km away
  2. 1.921 km NE of Soledad, California · 12953 days ago · 5 km deep · 96 km away
  3. 2.012 km NE of Coalinga, California · 12954 days ago · 13 km deep · 11 km away
  4. 2.319 km SE of Kettleman City, California · 12955 days ago · 23 km deep · 48 km away
  5. 1.721 km NE of Soledad, California · 12957 days ago · 3 km deep · 94 km away
  6. 2.322 km NNE of Soledad, California · 12958 days ago · 5 km deep · 99 km away
  7. 1.725 km SW of Firebaugh, California · 12958 days ago · 0 km deep · 75 km away
  8. 1.912 km NNW of San Simeon, California · 12959 days ago · 7 km deep · 98 km away
  9. 2.211 km NW of Parkfield, California · 12960 days ago · 11 km deep · 28 km away
  10. 2.414km SE of Hanford, CA · 12960 days ago · 5 km deep · 69 km away
  11. 2.010 km NW of Parkfield, California · 12960 days ago · 10 km deep · 28 km away
  12. 2.421 km NE of Soledad, California · 12962 days ago · 6 km deep · 96 km away
  13. 1.65 km SSE of Parkfield, California · 12962 days ago · 4 km deep · 30 km away
  14. 2.25 km SSE of Parkfield, California · 12962 days ago · 4 km deep · 30 km away
  15. 3.0Central California · 12962 days ago · 4 km deep · 31 km away
  16. 2.219 km NNE of Soledad, California · 12963 days ago · 12 km deep · 99 km away
  17. 1.519 km NNE of Soledad, California · 12963 days ago · 12 km deep · 99 km away
  18. 1.719 km NNE of Soledad, California · 12963 days ago · 12 km deep · 99 km away
  19. 2.219 km NNE of Soledad, California · 12963 days ago · 12 km deep · 99 km away
  20. 2.018 km N of Coalinga, California · 12963 days ago · 9 km deep · 24 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc210977. Read Sun, Oct 4, 2026, 10:39 PM UTC.