California earthquakes

M2.2 earthquake 9km NNE of Simi Valley, CA

A magnitude 2.2 earthquake struck 9km NNE of Simi Valley, CA on Sat, May 27, 1978, 5:17 PM PDT (00:17 UTC), 15 km (9 mi) below the surface.

A larger quake followed: M4.2 21km WNW of Grapevine, CA. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
2.2 (Mh), micro
Magnitude from
Southern California Seismic Network
Local time
UTC
1978-05-28 00:17:39 UTC
Depth
14.6 km (9.1 mi), shallow
Epicenter
34.345° N, 118.696° 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 0.5 km horizontally, 0.8 km in depth
Magnitude uncertainty
±0.18
Depth from
From location
Station coverage gap
40°
Stations used
28

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 96 in the 60 days after this one and 41 in the 30 days before it.

After

  1. 1.917km SSE of Carpinteria, CA · 17656 days ago · 0 km deep · 71 km away
  2. 2.136km NNW of Santa Barbara Is., CA · 17655 days ago · 0 km deep · 77 km away
  3. 1.819km SE of Arvin, CA · 17655 days ago · 11 km deep · 81 km away
  4. 1.714km W of Malibu, CA · 17655 days ago · 17 km deep · 44 km away
  5. 1.820km S of Carpinteria, CA · 17655 days ago · 13 km deep · 74 km away
  6. 2.29km NNE of Lake View Terrace, CA · 17654 days ago · 5 km deep · 36 km away
  7. 2.24km SE of Rowland Heights, CA · 17654 days ago · 9 km deep · 88 km away
  8. 3.64km NW of Yorba Linda, CA · 17653 days ago · 10 km deep · 92 km away
  9. 2.35km N of Yorba Linda, CA · 17653 days ago · 13 km deep · 93 km away
  10. 1.74km NNW of Yorba Linda, CA · 17653 days ago · 15 km deep · 93 km away
  11. 1.810km SW of Agua Dulce, CA · 17651 days ago · 11 km deep · 30 km away
  12. 1.88km SE of Santa Clarita, CA · 17651 days ago · 13 km deep · 22 km away
  13. 1.923km S of Port Hueneme, CA · 17650 days ago · 6 km deep · 65 km away
  14. 2.417km SW of Arvin, CA · 17649 days ago · 5 km deep · 89 km away
  15. 2.217km NW of Santa Barbara Is., CA · 17649 days ago · 6 km deep · 99 km away
  16. 1.516km SSW of Lamont, CA · 17649 days ago · 7 km deep · 91 km away
  17. 1.816km SSW of Lamont, CA · 17649 days ago · 1 km deep · 91 km away
  18. 2.612km W of Grapevine, CA · 17647 days ago · 7 km deep · 73 km away
  19. 1.919km S of Carpinteria, CA · 17647 days ago · 4 km deep · 76 km away
  20. 1.820km N of Santa Cruz Is. (E end), CA · 17647 days ago · 13 km deep · 76 km away
  21. 2.44km NNE of Cerritos, CA · 17646 days ago · 12 km deep · 78 km away
  22. 1.710km E of Santa Clarita, CA · 17646 days ago · 8 km deep · 28 km away
  23. 1.56km NW of Vincent, CA · 17646 days ago · 14 km deep · 54 km away
  24. 2.18km NE of Santa Clarita, CA · 17646 days ago · 15 km deep · 26 km away
  25. 2.04km WNW of Pomona, CA · 17646 days ago · 9 km deep · 88 km away
  26. 1.95km SW of Pearblossum, CA · 17645 days ago · 12 km deep · 71 km away
  27. 2.89km SSW of Valencia, CA · 17643 days ago · 3 km deep · 8 km away
  28. 4.221km WNW of Grapevine, CA · 17641 days ago · 11 km deep · 87 km away
  29. 2.922km N of Pine Mountain Club, CA · 17641 days ago · 0 km deep · 88 km away
  30. 1.818km ESE of Arvin, CA · 17641 days ago · 8 km deep · 92 km away
  31. 1.512km SE of Arvin, CA · 17639 days ago · 6 km deep · 89 km away
  32. 2.419km S of Carpinteria, CA · 17638 days ago · 12 km deep · 75 km away
  33. 1.820km S of Carpinteria, CA · 17638 days ago · 5 km deep · 76 km away
  34. 2.419km S of Carpinteria, CA · 17638 days ago · 11 km deep · 74 km away
  35. 1.918km N of Santa Cruz Is. (E end), CA · 17638 days ago · 6 km deep · 79 km away
  36. 3.07km E of Lake Los Angeles, CA · 17638 days ago · 6 km deep · 91 km away
  37. 2.116km ENE of Ojai, CA · 17637 days ago · 18 km deep · 41 km away
  38. 2.71km WSW of Frazier Park, CA · 17635 days ago · 12 km deep · 58 km away
  39. 1.911km NNE of Lake View Terrace, CA · 17635 days ago · 4 km deep · 36 km away
  40. 2.224km W of Palos Verdes Estates, CA · 17634 days ago · 6 km deep · 64 km away
  41. 1.716km ENE of Ojai, CA · 17634 days ago · 18 km deep · 42 km away
  42. 2.017km N of Santa Cruz Is. (E end), CA · 17634 days ago · 14 km deep · 80 km away
  43. 2.030km SE of Santa Cruz Is. (E end), CA · 17633 days ago · 6 km deep · 78 km away
  44. 2.87km SSE of Santa Barbara, CA · 17632 days ago · 11 km deep · 90 km away
  45. 1.91km ENE of Placentia, CA · 17631 days ago · 10 km deep · 93 km away
  46. 1.718km N of Santa Cruz Is. (E end), CA · 17631 days ago · 15 km deep · 79 km away
  47. 1.712km N of Pine Mountain Club, CA · 17631 days ago · 13 km deep · 78 km away
  48. 1.717km N of Santa Cruz Is. (E end), CA · 17631 days ago · 7 km deep · 81 km away
  49. 2.37km SSW of Westlake Village, CA · 17630 days ago · 12 km deep · 31 km away
  50. 1.69km NE of Santa Clarita, CA · 17630 days ago · 15 km deep · 27 km away
  51. 1.98km NNE of Sunland, CA · 17629 days ago · 8 km deep · 40 km away
  52. 1.53km SE of Santa Clarita, CA · 17629 days ago · 16 km deep · 20 km away
  53. 1.62km SE of Santa Clarita, CA · 17629 days ago · 16 km deep · 20 km away
  54. 3.06km WNW of Castaic, CA · 17629 days ago · 18 km deep · 18 km away
  55. 1.72km SSE of Paramount, CA · 17629 days ago · 15 km deep · 73 km away
  56. 1.86km SSE of Santa Barbara, CA · 17626 days ago · 15 km deep · 90 km away
  57. 1.613km SW of Carpinteria, CA · 17626 days ago · 6 km deep · 84 km away
  58. 1.815km NNE of Grapevine, CA · 17623 days ago · 11 km deep · 82 km away
  59. 1.623km SE of Santa Cruz Is. (E end), CA · 17623 days ago · 6 km deep · 77 km away
  60. 1.619km SSE of Malibu, CA · 17618 days ago · 10 km deep · 54 km away

The first 60 of 96.

Before

  1. 1.512km SW of Lamont, CA · 17661 days ago · 6 km deep · 99 km away
  2. 2.627km S of Port Hueneme, CA · 17663 days ago · 0 km deep · 64 km away
  3. 2.426km S of Port Hueneme, CA · 17664 days ago · 1 km deep · 63 km away
  4. 1.710km WNW of Neenach, CA · 17664 days ago · 6 km deep · 52 km away
  5. 1.832km S of Port Hueneme, CA · 17665 days ago · 6 km deep · 69 km away
  6. 3.127km S of Port Hueneme, CA · 17665 days ago · 10 km deep · 65 km away
  7. 1.831km S of Port Hueneme, CA · 17665 days ago · 0 km deep · 68 km away
  8. 2.030km S of Port Hueneme, CA · 17665 days ago · 0 km deep · 68 km away
  9. 1.828km SSE of Port Hueneme, CA · 17665 days ago · 0 km deep · 63 km away
  10. 1.627km S of Port Hueneme, CA · 17665 days ago · 6 km deep · 68 km away
  11. 2.627km S of Port Hueneme, CA · 17665 days ago · 1 km deep · 64 km away
  12. 2.229km S of Port Hueneme, CA · 17665 days ago · 0 km deep · 66 km away
  13. 2.527km S of Port Hueneme, CA · 17665 days ago · 0 km deep · 65 km away
  14. 2.325km S of Port Hueneme, CA · 17665 days ago · 6 km deep · 62 km away
  15. 2.826km S of Port Hueneme, CA · 17665 days ago · 1 km deep · 64 km away
  16. 1.827km S of Port Hueneme, CA · 17665 days ago · 2 km deep · 65 km away
  17. 3.928km S of Port Hueneme, CA · 17665 days ago · 13 km deep · 65 km away
  18. 2.28km NNW of Malibu, CA · 17668 days ago · 6 km deep · 34 km away
  19. 2.12km NNW of Simi Valley, CA · 17672 days ago · 11 km deep · 8 km away
  20. 1.84km NNE of Baldwin Hills, CA · 17675 days ago · 11 km deep · 47 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci3339694. Read Sat, Oct 3, 2026, 12:52 PM UTC.