California earthquakes

M2.1 earthquake 2km NNW of Simi Valley, CA

A magnitude 2.1 earthquake struck 2km NNW of Simi Valley, CA on Tue, May 16, 1978, 1:33 AM PDT (08:33 UTC), 11 km (7 mi) below the surface.

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

Simi Valley 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
2.1 (Mh), micro
Magnitude from
Southern California Seismic Network
Local time
UTC
1978-05-16 08:33:16 UTC
Depth
11.1 km (6.9 mi), shallow
Epicenter
34.287° N, 118.749° 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 0.6 km horizontally, 1.4 km in depth
Magnitude uncertainty
±0.15
Depth from
From location
Station coverage gap
85°
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: 97 in the 60 days after this one and 43 in the 30 days before it.

After

  1. 2.28km NNW of Malibu, CA · 17670 days ago · 6 km deep · 26 km away
  2. 3.928km S of Port Hueneme, CA · 17667 days ago · 13 km deep · 57 km away
  3. 1.827km S of Port Hueneme, CA · 17667 days ago · 2 km deep · 57 km away
  4. 2.826km S of Port Hueneme, CA · 17667 days ago · 1 km deep · 56 km away
  5. 2.325km S of Port Hueneme, CA · 17667 days ago · 6 km deep · 54 km away
  6. 2.527km S of Port Hueneme, CA · 17667 days ago · 0 km deep · 57 km away
  7. 2.229km S of Port Hueneme, CA · 17667 days ago · 0 km deep · 58 km away
  8. 2.627km S of Port Hueneme, CA · 17667 days ago · 1 km deep · 56 km away
  9. 1.627km S of Port Hueneme, CA · 17667 days ago · 6 km deep · 60 km away
  10. 1.828km SSE of Port Hueneme, CA · 17667 days ago · 0 km deep · 55 km away
  11. 2.030km S of Port Hueneme, CA · 17667 days ago · 0 km deep · 60 km away
  12. 1.831km S of Port Hueneme, CA · 17667 days ago · 0 km deep · 60 km away
  13. 3.127km S of Port Hueneme, CA · 17667 days ago · 10 km deep · 56 km away
  14. 1.832km S of Port Hueneme, CA · 17666 days ago · 6 km deep · 61 km away
  15. 1.710km WNW of Neenach, CA · 17666 days ago · 6 km deep · 58 km away
  16. 2.426km S of Port Hueneme, CA · 17666 days ago · 1 km deep · 55 km away
  17. 2.627km S of Port Hueneme, CA · 17665 days ago · 0 km deep · 56 km away
  18. 2.29km NNE of Simi Valley, CA · 17662 days ago · 15 km deep · 8 km away
  19. 1.917km SSE of Carpinteria, CA · 17658 days ago · 0 km deep · 65 km away
  20. 2.136km NNW of Santa Barbara Is., CA · 17657 days ago · 0 km deep · 69 km away
  21. 1.819km SE of Arvin, CA · 17657 days ago · 11 km deep · 88 km away
  22. 1.714km W of Malibu, CA · 17657 days ago · 17 km deep · 36 km away
  23. 1.820km S of Carpinteria, CA · 17657 days ago · 13 km deep · 68 km away
  24. 2.29km NNE of Lake View Terrace, CA · 17656 days ago · 5 km deep · 41 km away
  25. 2.24km SE of Rowland Heights, CA · 17656 days ago · 9 km deep · 89 km away
  26. 3.64km NW of Yorba Linda, CA · 17655 days ago · 10 km deep · 93 km away
  27. 2.35km N of Yorba Linda, CA · 17655 days ago · 13 km deep · 94 km away
  28. 1.74km NNW of Yorba Linda, CA · 17655 days ago · 15 km deep · 94 km away
  29. 2.023km NNE of Avalon, CA · 17653 days ago · 6 km deep · 97 km away
  30. 1.810km SW of Agua Dulce, CA · 17653 days ago · 11 km deep · 37 km away
  31. 1.88km SE of Santa Clarita, CA · 17652 days ago · 13 km deep · 28 km away
  32. 1.923km S of Port Hueneme, CA · 17652 days ago · 6 km deep · 57 km away
  33. 2.417km SW of Arvin, CA · 17651 days ago · 5 km deep · 94 km away
  34. 2.217km NW of Santa Barbara Is., CA · 17651 days ago · 6 km deep · 91 km away
  35. 1.516km SSW of Lamont, CA · 17651 days ago · 7 km deep · 96 km away
  36. 1.816km SSW of Lamont, CA · 17651 days ago · 1 km deep · 96 km away
  37. 2.612km W of Grapevine, CA · 17649 days ago · 7 km deep · 77 km away
  38. 1.919km S of Carpinteria, CA · 17649 days ago · 4 km deep · 70 km away
  39. 1.820km N of Santa Cruz Is. (E end), CA · 17649 days ago · 13 km deep · 70 km away
  40. 2.44km NNE of Cerritos, CA · 17648 days ago · 12 km deep · 78 km away
  41. 1.710km E of Santa Clarita, CA · 17648 days ago · 8 km deep · 34 km away
  42. 1.56km NW of Vincent, CA · 17648 days ago · 14 km deep · 61 km away
  43. 2.18km NE of Santa Clarita, CA · 17648 days ago · 15 km deep · 34 km away
  44. 2.04km WNW of Pomona, CA · 17648 days ago · 9 km deep · 91 km away
  45. 1.95km SW of Pearblossum, CA · 17647 days ago · 12 km deep · 77 km away
  46. 2.89km SSW of Valencia, CA · 17645 days ago · 3 km deep · 16 km away
  47. 4.221km WNW of Grapevine, CA · 17643 days ago · 11 km deep · 91 km away
  48. 2.922km N of Pine Mountain Club, CA · 17643 days ago · 0 km deep · 92 km away
  49. 1.818km ESE of Arvin, CA · 17643 days ago · 8 km deep · 99 km away
  50. 1.512km SE of Arvin, CA · 17641 days ago · 6 km deep · 96 km away
  51. 2.419km S of Carpinteria, CA · 17640 days ago · 12 km deep · 69 km away
  52. 1.820km S of Carpinteria, CA · 17640 days ago · 5 km deep · 70 km away
  53. 2.419km S of Carpinteria, CA · 17640 days ago · 11 km deep · 69 km away
  54. 1.918km N of Santa Cruz Is. (E end), CA · 17640 days ago · 6 km deep · 73 km away
  55. 3.07km E of Lake Los Angeles, CA · 17640 days ago · 6 km deep · 98 km away
  56. 2.116km ENE of Ojai, CA · 17639 days ago · 18 km deep · 41 km away
  57. 2.71km WSW of Frazier Park, CA · 17637 days ago · 12 km deep · 62 km away
  58. 1.911km NNE of Lake View Terrace, CA · 17637 days ago · 4 km deep · 42 km away
  59. 2.224km W of Palos Verdes Estates, CA · 17636 days ago · 6 km deep · 58 km away
  60. 1.716km ENE of Ojai, CA · 17636 days ago · 18 km deep · 42 km away

The first 60 of 97.

Before

  1. 1.84km NNE of Baldwin Hills, CA · 17677 days ago · 11 km deep · 46 km away
  2. 1.716km SSW of Carpinteria, CA · 17678 days ago · 15 km deep · 79 km away
  3. 2.73km N of Marina del Rey, CA · 17679 days ago · 5 km deep · 41 km away
  4. 3.02km SE of View Park-Windsor Hills, CA · 17679 days ago · 8 km deep · 51 km away
  5. 1.88km NW of Fillmore, CA · 17680 days ago · 0 km deep · 28 km away
  6. 2.72km N of Garden Grove, CA · 17681 days ago · 9 km deep · 91 km away
  7. 1.616km NNW of Grapevine, CA · 17682 days ago · 6 km deep · 91 km away
  8. 2.117km SW of Thousand Oaks, CA · 17685 days ago · 12 km deep · 33 km away
  9. 1.96km NNE of Sunland, CA · 17685 days ago · 7 km deep · 43 km away
  10. 1.717km WNW of Malibu, CA · 17686 days ago · 17 km deep · 35 km away
  11. 1.619km SSE of Carpinteria, CA · 17686 days ago · 16 km deep · 66 km away
  12. 2.019km SSW of Port Hueneme, CA · 17687 days ago · 0 km deep · 58 km away
  13. 2.119km SSW of Port Hueneme, CA · 17687 days ago · 2 km deep · 58 km away
  14. 1.518km N of Santa Cruz Is. (E end), CA · 17688 days ago · 6 km deep · 70 km away
  15. 1.518km SSE of Carpinteria, CA · 17688 days ago · 6 km deep · 66 km away
  16. 2.510km SE of Malibu, CA · 17689 days ago · 9 km deep · 39 km away
  17. 2.221km NNE of Avalon, CA · 17689 days ago · 6 km deep · 95 km away
  18. 2.313km WNW of Malibu, CA · 17689 days ago · 8 km deep · 32 km away
  19. 2.520km SSW of Port Hueneme, CA · 17689 days ago · 0 km deep · 59 km away
  20. 1.82km NW of Palos Verdes Estates, CA · 17690 days ago · 6 km deep · 62 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci3339487. Read Mon, Oct 5, 2026, 11:43 AM UTC.