Mexico earthquakes

M1.8 earthquake 39km SW of Rosarito, B.C., MX

A magnitude 1.8 earthquake struck 39km SW of Rosarito, B.C., MX on Mon, Sep 21, 1981, 3:11 PM PDT (22:11 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M3.4 7km SW of Ensenada, B.C., MX. This one was a foreshock.

Rosarito forecastMore in Mexico

Map

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

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The earthquake

Magnitude
1.8 (mh), micro
Local time
UTC
1981-09-21 22:11:47 UTC
Depth
5.6 km (3.5 mi), shallow
Epicenter
32.130° N, 117.373° W
Region
Mexico
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 2.5 km horizontally, 31.6 km in depth
Depth from
Operator assigned
Station coverage gap
78°
Stations used
12

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 33 in the 60 days after this one and 9 in the 30 days before it.

After

  1. 2.595km WSW of Rosarito, B.C., MX · 16444 days ago · 6 km deep · 56 km away
  2. 2.16km ESE of La Jolla, CA · 16444 days ago · 10 km deep · 79 km away
  3. 2.031km NE of Ensenada, B.C., MX · 16440 days ago · 6 km deep · 97 km away
  4. 2.23km SE of Coronado, CA · 16439 days ago · 5 km deep · 63 km away
  5. 2.137km NE of Ensenada, B.C., MX · 16434 days ago · 6 km deep · 93 km away
  6. 1.933km NE of Ensenada, B.C., MX · 16434 days ago · 6 km deep · 93 km away
  7. 2.836km NE of Ensenada, B.C., MX · 16433 days ago · 6 km deep · 95 km away
  8. 3.07km SW of Ensenada, B.C., MX · 16428 days ago · 6 km deep · 73 km away
  9. 2.310km SSW of El Sauzal, B.C., MX · 16428 days ago · 6 km deep · 71 km away
  10. 2.04km S of El Sauzal, B.C., MX · 16428 days ago · 6 km deep · 72 km away
  11. 2.36km S of El Sauzal, B.C., MX · 16428 days ago · 6 km deep · 72 km away
  12. 2.210km SSW of El Sauzal, B.C., MX · 16427 days ago · 6 km deep · 71 km away
  13. 2.036km NE of Ensenada, B.C., MX · 16426 days ago · 6 km deep · 95 km away
  14. 1.947km ESE of San Clemente Is. (SE tip), CA · 16426 days ago · 6 km deep · 75 km away
  15. 3.47km SW of Ensenada, B.C., MX · 16426 days ago · 6 km deep · 73 km away
  16. 2.38km SSW of El Sauzal, B.C., MX · 16426 days ago · 6 km deep · 71 km away
  17. 2.311km SW of Ensenada, B.C., MX · 16426 days ago · 6 km deep · 74 km away
  18. 2.36km SSW of Ensenada, B.C., MX · 16426 days ago · 5 km deep · 76 km away
  19. 2.58km SSW of Ensenada, B.C., MX · 16425 days ago · 5 km deep · 78 km away
  20. 2.411km SW of Ensenada, B.C., MX · 16425 days ago · 5 km deep · 74 km away
  21. 2.211km SSW of Ensenada, B.C., MX · 16424 days ago · 5 km deep · 77 km away
  22. 1.914km SW of Primo Tapia, B.C., MX · 16420 days ago · 5 km deep · 35 km away
  23. 2.035km SE of San Clemente Is. (SE tip), CA · 16417 days ago · 11 km deep · 84 km away
  24. 2.734km SE of San Clemente Is. (SE tip), CA · 16417 days ago · 11 km deep · 85 km away
  25. 2.029km NE of Ensenada, B.C., MX · 16409 days ago · 6 km deep · 95 km away
  26. 2.236km WSW of Encinitas, CA · 16407 days ago · 5 km deep · 94 km away
  27. 1.98km SW of La Jolla, CA · 16407 days ago · 6 km deep · 75 km away
  28. 2.014km SW of La Jolla, CA · 16407 days ago · 5 km deep · 70 km away
  29. 1.741km WSW of Encinitas, CA · 16403 days ago · 5 km deep · 93 km away
  30. 2.028km E of Primo Tapia, B.C., MX · 16400 days ago · 5 km deep · 71 km away
  31. 1.546km WSW of Encinitas, CA · 16392 days ago · 5 km deep · 94 km away
  32. 2.337km SE of San Clemente Is. (SE tip), CA · 16391 days ago · 6 km deep · 83 km away
  33. 2.312km SE of Primo Tapia, B.C., MX · 16391 days ago · 7 km deep · 51 km away

Before

  1. 2.841km SW of Rosarito, B.C., MX · 16445 days ago · 6 km deep · 6 km away
  2. 2.118km SW of La Jolla, CA · 16447 days ago · 6 km deep · 66 km away
  3. 2.234km NE of Ensenada, B.C., MX · 16450 days ago · 6 km deep · 94 km away
  4. 2.152km WSW of Rosarito, B.C., MX · 16452 days ago · 6 km deep · 22 km away
  5. 2.024km ESE of Primo Tapia, B.C., MX · 16462 days ago · 6 km deep · 64 km away
  6. 2.337km NE of Ensenada, B.C., MX · 16465 days ago · 6 km deep · 96 km away
  7. 1.937km NE of Ensenada, B.C., MX · 16465 days ago · 6 km deep · 95 km away
  8. 3.135km NE of Ensenada, B.C., MX · 16465 days ago · 6 km deep · 95 km away
  9. 2.016km SW of La Jolla, CA · 16466 days ago · 6 km deep · 69 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci523311. Read Wed, Sep 30, 2026, 8:16 PM UTC.