M1.8 earthquake 10 km NNE of Cayucos, California

Magnitude

1.8 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Mon, Sep 28, 1981, 7:25 PM PDT

UTC

1981-09-29 02:25:41 UTC

Depth

5.4 km (3.4 mi), shallow

Epicenter

35.528° N, 120.840° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.3 km horizontally, 0.8 km in depth

Magnitude uncertainty

±0.17

Depth from

From location

Station coverage gap

139°

Stations used

24

• Cayucos, CaliforniaPopulation 2,592. Forecast11 kmNNE
• Atascadero, CaliforniaPopulation 29,819. Forecast16 kmWNW
• Santa Maria, CaliforniaPopulation 105,093. Forecast74 kmNNW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast288 kmNW

After

1. 1.623 km NE of San Lucas, CaliforniaWed, Sep 30, 6:04 AM PDT · 16441 days ago · 5 km deep · 85 km away
2. 2.514 km SSW of Lockwood, CaliforniaWed, Sep 30, 2:13 PM PDT · 16440 days ago · 6 km deep · 42 km away
3. 1.621 km NW of Parkfield, CaliforniaFri, Oct 2, 9:21 AM PDT · 16439 days ago · 2 km deep · 61 km away
4. 2.015km S of Kettleman City, CAMon, Oct 5, 2:30 PM PDT · 16435 days ago · 5 km deep · 91 km away
5. 2.08 km W of Huron, CaliforniaMon, Oct 5, 10:57 PM PDT · 16435 days ago · 9 km deep · 94 km away
6. 1.56 km WSW of Paso Robles, CaliforniaTue, Oct 6, 5:33 AM PDT · 16435 days ago · 5 km deep · 11 km away
7. 1.923 km NE of King City, CaliforniaFri, Oct 9, 6:55 AM PDT · 16432 days ago · 4 km deep · 93 km away
8. 2.423km ENE of Santa Maria, CASat, Oct 10, 2:40 PM PDT · 16430 days ago · 11 km deep · 76 km away
9. 2.1Central CaliforniaSun, Oct 11, 12:40 AM PDT · 16430 days ago · 11 km deep · 59 km away
10. 1.98 km WSW of Atascadero, CaliforniaSun, Oct 11, 2:05 PM PDT · 16429 days ago · 6 km deep · 9 km away
11. 1.68 km W of Oak Shores, CaliforniaMon, Oct 12, 12:28 PM PDT · 16429 days ago · 7 km deep · 34 km away
12. 1.822 km ENE of San Ardo, CaliforniaTue, Oct 13, 6:59 PM PDT · 16427 days ago · 2 km deep · 66 km away
13. 1.528 km NE of San Lucas, CaliforniaThu, Oct 15, 11:19 PM PDT · 16425 days ago · 9 km deep · 86 km away
14. 1.78km W of Los Alamos, CAWed, Oct 21, 6:43 AM PDT · 16420 days ago · 5 km deep · 97 km away
15. 1.922 km NW of Parkfield, CaliforniaSun, Oct 25, 12:53 PM PST · 16415 days ago · 4 km deep · 62 km away
16. 2.579km WSW of Avila Beach, CAMon, Oct 26, 1:29 AM PST · 16415 days ago · 6 km deep · 97 km away
17. 1.519 km NW of Parkfield, CaliforniaTue, Oct 27, 12:24 AM PST · 16414 days ago · 4 km deep · 60 km away
18. 2.213 km SE of Parkfield, CaliforniaTue, Oct 27, 9:52 AM PST · 16414 days ago · 10 km deep · 54 km away
19. 1.86 km NE of Cambria, CaliforniaTue, Oct 27, 3:09 PM PST · 16413 days ago · 3 km deep · 19 km away
20. 2.816 km NW of Parkfield, CaliforniaWed, Oct 28, 2:16 PM PST · 16412 days ago · 5 km deep · 59 km away
21. 1.531 km WNW of Coalinga, CaliforniaThu, Oct 29, 4:09 PM PST · 16411 days ago · 10 km deep · 81 km away
22. 1.62 km S of Parkfield, CaliforniaFri, Oct 30, 8:20 PM PST · 16410 days ago · 10 km deep · 53 km away
23. 2.424 km NE of King City, CaliforniaMon, Nov 2, 3:57 PM PST · 16407 days ago · 9 km deep · 95 km away
24. 2.411 km WSW of Huron, CaliforniaWed, Nov 4, 12:53 PM PST · 16405 days ago · 8 km deep · 90 km away
25. 1.87 km SW of Templeton, CaliforniaWed, Nov 4, 5:47 PM PST · 16405 days ago · 5 km deep · 7 km away
26. 1.62 km ESE of San Ardo, CaliforniaWed, Nov 4, 5:52 PM PST · 16405 days ago · 10 km deep · 54 km away
27. 1.524 km ENE of San Lucas, CaliforniaFri, Nov 6, 4:56 PM PST · 16403 days ago · 5 km deep · 78 km away
28. 2.022 km NE of San Lucas, CaliforniaSun, Nov 8, 7:40 PM PST · 16401 days ago · 7 km deep · 83 km away
29. 1.726 km NE of San Ardo, CaliforniaMon, Nov 9, 7:45 AM PST · 16401 days ago · 5 km deep · 75 km away
30. 1.520 km SW of Three Rocks, CaliforniaTue, Nov 10, 9:26 AM PST · 16400 days ago · 17 km deep · 98 km away
31. 1.822 km NNE of San Lucas, CaliforniaWed, Nov 11, 6:31 PM PST · 16398 days ago · 4 km deep · 87 km away
32. 1.625 km NE of San Lucas, CaliforniaThu, Nov 19, 11:24 PM PST · 16390 days ago · 7 km deep · 84 km away
33. 1.921 km NW of San Simeon, CaliforniaSat, Nov 21, 12:34 PM PST · 16388 days ago · 1 km deep · 56 km away
34. 1.822 km SW of Three Rocks, CaliforniaSun, Nov 22, 3:26 AM PST · 16388 days ago · 16 km deep · 97 km away
35. 2.116 km NW of Parkfield, CaliforniaThu, Nov 26, 2:58 AM PST · 16384 days ago · 5 km deep · 59 km away
36. 2.423 km ENE of San Lucas, CaliforniaThu, Nov 26, 10:48 AM PST · 16384 days ago · 5 km deep · 77 km away
37. 2.023 km NE of King City, CaliforniaFri, Nov 27, 7:52 AM PST · 16383 days ago · 4 km deep · 93 km away
38. 2.315 km W of Guadalupe, CaliforniaFri, Nov 27, 1:09 PM PST · 16382 days ago · 1 km deep · 64 km away
39. 1.76 km WNW of San Ardo, CaliforniaFri, Nov 27, 1:21 PM PST · 16382 days ago · 6 km deep · 59 km away

Before

1. 1.927 km ENE of King City, CaliforniaSun, Sep 27, 1:01 AM PDT · 16444 days ago · 9 km deep · 91 km away
2. 3.014 km SSE of Coalinga, CaliforniaSat, Sep 26, 7:03 AM PDT · 16445 days ago · 0 km deep · 73 km away
3. 2.112 km SE of Coalinga, CaliforniaSat, Sep 26, 7:03 AM PDT · 16445 days ago · 9 km deep · 78 km away
4. 2.2Central CaliforniaFri, Sep 25, 3:23 PM PDT · 16445 days ago · 6 km deep · 97 km away
5. 2.123 km NE of San Lucas, CaliforniaFri, Sep 25, 12:42 PM PDT · 16446 days ago · 7 km deep · 81 km away
6. 1.725 km WSW of Coalinga, CaliforniaFri, Sep 25, 9:43 AM PDT · 16446 days ago · 2 km deep · 63 km away
7. 1.9Central CaliforniaThu, Sep 24, 7:30 PM PDT · 16446 days ago · 2 km deep · 64 km away
8. 1.59 km WSW of Atascadero, CaliforniaThu, Sep 24, 5:47 AM PDT · 16447 days ago · 5 km deep · 9 km away
9. 2.217 km NNW of San Simeon, CaliforniaThu, Sep 24, 2:29 AM PDT · 16447 days ago · 4 km deep · 49 km away
10. 2.337 km WSW of Guadalupe, CaliforniaWed, Sep 23, 5:33 AM PDT · 16448 days ago · 0 km deep · 75 km away
11. 1.926 km SE of Big Sur, CaliforniaMon, Sep 21, 1:07 PM PDT · 16449 days ago · 5 km deep · 94 km away
12. 1.925 km SE of Big Sur, CaliforniaFri, Sep 18, 1:19 PM PDT · 16452 days ago · 9 km deep · 94 km away
13. 1.825 km NW of San Simeon, CaliforniaFri, Sep 18, 7:45 AM PDT · 16453 days ago · 12 km deep · 57 km away
14. 1.514 km NW of San Simeon, CaliforniaThu, Sep 17, 1:39 AM PDT · 16454 days ago · 8 km deep · 48 km away
15. 2.718 km NNW of San Simeon, CaliforniaWed, Sep 16, 9:47 PM PDT · 16454 days ago · 6 km deep · 50 km away
16. 1.8Near the coast of Central CaliforniaWed, Sep 16, 8:37 PM PDT · 16454 days ago · 6 km deep · 24 km away
17. 2.7Near the coast of Central CaliforniaWed, Sep 16, 8:20 PM PDT · 16454 days ago · 10 km deep · 50 km away
18. 3.117 km NNW of San Simeon, CaliforniaWed, Sep 16, 7:59 PM PDT · 16454 days ago · 7 km deep · 49 km away
19. 2.015 km NW of Parkfield, CaliforniaTue, Sep 15, 11:35 AM PDT · 16456 days ago · 4 km deep · 58 km away
20. 2.742 km W of Lockwood, CaliforniaSun, Sep 13, 5:56 PM PDT · 16457 days ago · 10 km deep · 76 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1068026. Read Mon, Oct 5, 2026, 7:21 AM UTC.