California earthquakes

M2.1 earthquake 3km NW of Palomar Observatory, CA

A magnitude 2.1 earthquake struck 3km NW of Palomar Observatory, CA on Wed, Dec 22, 2021, 8:21 PM PST (04:21 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M4.0 5km WSW of Palomar Observatory, 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
2.1 (ML, local (Richter)), micro
Magnitude from
Southern California Seismic Network
Local time
UTC
2021-12-23 04:21:09 UTC
Depth
4.9 km (3.0 mi), shallow
Epicenter
33.376° N, 116.881° 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 0.1 km horizontally, 0.4 km in depth
Magnitude uncertainty
±0.14
Depth from
From location
Station coverage gap
18°
Stations used
92

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 156 in the 60 days after this one and 58 in the 30 days before it.

After

  1. 2.13km NW of Palomar Observatory, CA · 1746 days ago · 6 km deep · 0 km away
  2. 2.13km NNW of Palomar Observatory, CA · 1746 days ago · 6 km deep · 0 km away
  3. 1.76km E of Calimesa, CA · 1746 days ago · 17 km deep · 70 km away
  4. 1.77km SE of Valle Vista, CA · 1746 days ago · 15 km deep · 38 km away · felt by 1
  5. 3.13km NW of Palomar Observatory, CA · 1746 days ago · 5 km deep · 1 km away · felt by 37
  6. 2.03km NW of Palomar Observatory, CA · 1746 days ago · 5 km deep · 0 km away
  7. 1.717km NNE of Indio, CA · 1746 days ago · 4 km deep · 86 km away
  8. 2.03km NW of Palomar Observatory, CA · 1746 days ago · 5 km deep · 0 km away
  9. 1.811km NNE of Banning, CA · 1744 days ago · 18 km deep · 72 km away
  10. 1.612km SSW of Borrego Springs, CA · 1744 days ago · 14 km deep · 47 km away
  11. 2.111km SSW of Borrego Springs, CA · 1744 days ago · 12 km deep · 47 km away
  12. 1.511km SSW of Borrego Springs, CA · 1744 days ago · 13 km deep · 47 km away
  13. 1.910km S of Big Bear City, CA · 1743 days ago · 7 km deep · 89 km away
  14. 1.53km NNW of Palomar Observatory, CA · 1742 days ago · 5 km deep · 0 km away
  15. 2.210km N of Borrego Springs, CA · 1742 days ago · 12 km deep · 46 km away
  16. 1.917km ESE of Julian, CA · 1741 days ago · 10 km deep · 57 km away
  17. 1.716km E of Ocotillo Wells, CA · 1741 days ago · 9 km deep · 90 km away
  18. 2.913km N of Indio, CA · 1741 days ago · 9 km deep · 82 km away · felt by 50
  19. 1.56km E of Ocotillo Wells, CA · 1740 days ago · 10 km deep · 80 km away
  20. 2.022km SSW of La Quinta, CA · 1740 days ago · 9 km deep · 44 km away
  21. 1.718km WSW of La Jolla, CA · 1739 days ago · 13 km deep · 85 km away
  22. 2.03km NNW of Palomar Observatory, CA · 1739 days ago · 5 km deep · 0 km away · felt by 1
  23. 1.814km SE of Anza, CA · 1739 days ago · 10 km deep · 29 km away
  24. 1.910km W of Palomar Observatory, CA · 1738 days ago · 8 km deep · 9 km away
  25. 1.69km W of Palomar Observatory, CA · 1738 days ago · 6 km deep · 8 km away
  26. 2.010km E of Pala, CA · 1738 days ago · 7 km deep · 9 km away
  27. 3.02km NW of Palomar Observatory, CA · 1738 days ago · 5 km deep · 0 km away · felt by 27
  28. 1.83km NNW of Palomar Observatory, CA · 1738 days ago · 5 km deep · 0 km away
  29. 2.62km NW of Palomar Observatory, CA · 1738 days ago · 5 km deep · 0 km away · felt by 2
  30. 1.93km NNW of Palomar Observatory, CA · 1738 days ago · 6 km deep · 0 km away
  31. 1.75km N of Cabazon, CA · 1738 days ago · 12 km deep · 65 km away
  32. 3.43km SW of Redlands, CA · 1738 days ago · 14 km deep · 79 km away · felt by 509
  33. 2.12km NNW of Palomar Observatory, CA · 1737 days ago · 5 km deep · 1 km away
  34. 1.63km W of Redlands, CA · 1737 days ago · 14 km deep · 81 km away
  35. 1.612km NE of Ocotillo Wells, CA · 1737 days ago · 10 km deep · 80 km away
  36. 1.614km SSE of Valle Vista, CA · 1736 days ago · 13 km deep · 29 km away
  37. 1.810km S of Idyllwild, CA · 1735 days ago · 15 km deep · 33 km away
  38. 2.410km SSW of Idyllwild, CA · 1735 days ago · 15 km deep · 33 km away
  39. 1.62km NNW of Palomar Observatory, CA · 1735 days ago · 5 km deep · 1 km away
  40. 1.81km WSW of Valle Vista, CA · 1734 days ago · 5 km deep · 41 km away
  41. 1.914km NNE of Borrego Springs, CA · 1734 days ago · 11 km deep · 54 km away
  42. 1.716km NE of Borrego Springs, CA · 1734 days ago · 12 km deep · 60 km away
  43. 1.716km S of San Clemente, CA · 1733 days ago · 11 km deep · 67 km away
  44. 1.712km N of Borrego Springs, CA · 1731 days ago · 2 km deep · 49 km away
  45. 1.812km N of Borrego Springs, CA · 1731 days ago · 4 km deep · 49 km away
  46. 1.730km WSW of La Jolla, CA · 1731 days ago · 16 km deep · 96 km away · felt by 1
  47. 2.03km NW of Palomar Observatory, CA · 1729 days ago · 5 km deep · 0 km away
  48. 3.23km NW of Palomar Observatory, CA · 1729 days ago · 5 km deep · 1 km away · felt by 67
  49. 1.92km NNW of Palomar Observatory, CA · 1729 days ago · 6 km deep · 0 km away
  50. 2.13km NW of Palomar Observatory, CA · 1729 days ago · 5 km deep · 0 km away
  51. 2.22km NW of Palomar Observatory, CA · 1729 days ago · 5 km deep · 0 km away · felt by 1
  52. 2.012km SSW of Salton City, CA · 1729 days ago · 8 km deep · 82 km away · felt by 1
  53. 1.615km E of Ocotillo Wells, CA · 1729 days ago · 9 km deep · 88 km away · felt by 1
  54. 1.711km NNE of Ocotillo Wells, CA · 1729 days ago · 10 km deep · 76 km away
  55. 1.610km NW of Anza, CA · 1728 days ago · 16 km deep · 31 km away
  56. 1.97km NNE of Borrego Springs, CA · 1727 days ago · 12 km deep · 51 km away
  57. 2.612km N of Borrego Springs, CA · 1726 days ago · 3 km deep · 48 km away · felt by 2
  58. 2.010km NNE of Ocotillo Wells, CA · 1726 days ago · 11 km deep · 76 km away
  59. 1.91km SE of Loma Linda, CA · 1726 days ago · 15 km deep · 81 km away · felt by 1
  60. 3.923km ESE of Anza, CA · 1725 days ago · 14 km deep · 42 km away · felt by 2,570

The first 60 of 156.

Before

  1. 2.511km ENE of Borrego Springs, CA · 1746 days ago · 5 km deep · 59 km away · felt by 3
  2. 2.73km NW of Palomar Observatory, CA · 1747 days ago · 5 km deep · 0 km away · felt by 53
  3. 1.78km SSE of Redlands, CA · 1747 days ago · 11 km deep · 73 km away
  4. 2.13km NNW of Palomar Observatory, CA · 1747 days ago · 5 km deep · 0 km away
  5. 1.86km ESE of Valle Vista, CA · 1748 days ago · 16 km deep · 38 km away
  6. 1.97km ESE of Cabazon, CA · 1748 days ago · 16 km deep · 61 km away
  7. 1.85km WNW of Beaumont, CA · 1748 days ago · 15 km deep · 65 km away
  8. 1.912km ENE of Borrego Springs, CA · 1749 days ago · 5 km deep · 59 km away
  9. 1.76km NNE of Lake Henshaw, CA · 1749 days ago · 12 km deep · 16 km away
  10. 1.53km NNW of Palomar Observatory, CA · 1750 days ago · 5 km deep · 0 km away
  11. 1.85km SSW of Idyllwild, CA · 1750 days ago · 16 km deep · 38 km away
  12. 2.92km N of Yucaipa, CA · 1751 days ago · 11 km deep · 76 km away · felt by 37
  13. 1.917km NNE of Borrego Springs, CA · 1751 days ago · 9 km deep · 53 km away
  14. 1.926km SSW of Ocotillo Wells, CA · 1751 days ago · 13 km deep · 76 km away
  15. 2.25km ENE of Calimesa, CA · 1751 days ago · 16 km deep · 70 km away
  16. 2.224km ENE of Thermal, CA · 1752 days ago · 7 km deep · 99 km away
  17. 1.811km ENE of Borrego Springs, CA · 1752 days ago · 4 km deep · 59 km away
  18. 2.511km E of Borrego Springs, CA · 1752 days ago · 5 km deep · 59 km away
  19. 1.623km ESE of Anza, CA · 1752 days ago · 13 km deep · 41 km away
  20. 1.924km ENE of Thermal, CA · 1752 days ago · 6 km deep · 99 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci39894375. Read Sun, Oct 4, 2026, 7:45 AM UTC.