M1.7 earthquake 3 km NNW of Pacifica, California

Magnitude

1.7 (md), micro

Local time

Tue, Feb 28, 1984, 7:35 AM PST

UTC

1984-02-28 15:35:42 UTC

Depth

6.3 km (3.9 mi), shallow

Epicenter

37.644° N, 122.503° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.6 km horizontally, 0.3 km in depth

Magnitude uncertainty

±0.12

Depth from

From location

Station coverage gap

179°

Stations used

24

• Pacifica, CaliforniaPopulation 39,260. Forecast4 kmNNW
• Daly City, CaliforniaPopulation 106,562. Forecast8 kmSSW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast554 kmNW

After

1. 2.316 km SSE of Livermore, CaliforniaTue, Feb 28, 10:06 AM PST · 15552 days ago · 3 km deep · 74 km away
2. 1.616 km E of Seven Trees, CaliforniaTue, Feb 28, 9:36 PM PST · 15551 days ago · 8 km deep · 85 km away
3. 1.916 km E of Seven Trees, CaliforniaTue, Feb 28, 10:00 PM PST · 15551 days ago · 8 km deep · 85 km away
4. 2.616 km E of Seven Trees, CaliforniaTue, Feb 28, 10:08 PM PST · 15551 days ago · 8 km deep · 85 km away
5. 1.74 km ESE of Santa Rosa, CaliforniaSat, Mar 3, 12:56 AM PST · 15548 days ago · 9 km deep · 88 km away
6. 1.74 km ESE of Santa Rosa, CaliforniaSat, Mar 3, 8:45 AM PST · 15548 days ago · 7 km deep · 88 km away
7. 1.61 km SW of Discovery Bay, CaliforniaWed, Mar 7, 6:07 AM PST · 15544 days ago · 13 km deep · 83 km away
8. 2.32 km SSE of Occidental, CaliforniaWed, Mar 7, 3:11 PM PST · 15543 days ago · 47 km deep · 91 km away
9. 1.610 km ENE of Blackhawk, CaliforniaFri, Mar 9, 11:17 AM PST · 15542 days ago · 9 km deep · 66 km away
10. 1.73 km ESE of Kenwood, CaliforniaSat, Mar 10, 5:30 AM PST · 15541 days ago · 17 km deep · 84 km away
11. 1.511 km SW of Brentwood, CaliforniaWed, Mar 14, 11:02 AM PST · 15537 days ago · 6 km deep · 67 km away
12. 1.55 km NNW of Day Valley, CaliforniaFri, Mar 16, 9:29 PM PST · 15534 days ago · 9 km deep · 83 km away
13. 1.80 km WNW of Green Valley, CaliforniaSat, Mar 17, 7:08 PM PST · 15533 days ago · 10 km deep · 74 km away
14. 4.110 km NNE of Livermore, CASat, Mar 17, 9:27 PM PST · 15533 days ago · 11 km deep · 70 km away
15. 1.73 km SW of Rutherford, CaliforniaSun, Mar 18, 11:13 AM PST · 15533 days ago · 6 km deep · 88 km away
16. 1.917 km E of East Foothills, CaliforniaMon, Mar 19, 3:10 AM PST · 15532 days ago · 7 km deep · 84 km away
17. 1.920 km W of Diablo Grande, CaliforniaTue, Mar 20, 9:57 AM PST · 15531 days ago · 7 km deep · 91 km away
18. 2.03 km E of North Gate, CaliforniaWed, Mar 21, 10:25 AM PST · 15530 days ago · 14 km deep · 56 km away
19. 1.76 km WSW of Inverness, CaliforniaThu, Mar 22, 1:49 PM PST · 15528 days ago · 5 km deep · 60 km away
20. 2.23 km SSW of Woodside, CaliforniaFri, Mar 23, 6:35 AM PST · 15528 days ago · 8 km deep · 34 km away
21. 1.76 km NNE of Black Point-Green Point, CaliforniaFri, Mar 23, 1:54 PM PST · 15527 days ago · 1 km deep · 58 km away
22. 2.43 km SSW of Green Valley, CaliforniaSat, Mar 24, 4:49 AM PST · 15527 days ago · 5 km deep · 71 km away
23. 2.21 km SSE of Green Valley, CaliforniaSat, Mar 24, 4:50 AM PST · 15527 days ago · 5 km deep · 73 km away
24. 2.00 km WSW of Green Valley, CaliforniaSat, Mar 24, 8:58 AM PST · 15527 days ago · 9 km deep · 73 km away
25. 1.76 km WNW of American Canyon, CaliforniaSat, Mar 24, 10:01 AM PST · 15527 days ago · 5 km deep · 63 km away
26. 1.81 km WNW of Concord, CaliforniaSun, Mar 25, 10:06 AM PST · 15526 days ago · 16 km deep · 55 km away
27. 1.55 km E of Fremont, CaliforniaMon, Mar 26, 5:31 AM PST · 15525 days ago · 6 km deep · 52 km away
28. 1.67 km E of East Foothills, CaliforniaMon, Mar 26, 5:24 PM PST · 15524 days ago · 6 km deep · 74 km away
29. 4.33 km ENE of San Leandro, CaliforniaMon, Mar 26, 7:36 PM PST · 15524 days ago · 7 km deep · 35 km away
30. 2.63 km NE of San Leandro, CaliforniaMon, Mar 26, 7:48 PM PST · 15524 days ago · 5 km deep · 35 km away
31. 1.63 km NE of San Leandro, CaliforniaMon, Mar 26, 8:10 PM PST · 15524 days ago · 5 km deep · 35 km away
32. 1.52 km ENE of San Leandro, CaliforniaTue, Mar 27, 5:18 AM PST · 15524 days ago · 3 km deep · 34 km away
33. 2.63 km NE of San Leandro, CaliforniaWed, Mar 28, 12:14 PM PST · 15522 days ago · 5 km deep · 35 km away
34. 1.63 km ENE of San Leandro, CaliforniaThu, Mar 29, 12:33 PM PST · 15521 days ago · 4 km deep · 35 km away
35. 2.72 km ENE of San Leandro, CaliforniaThu, Mar 29, 12:41 PM PST · 15521 days ago · 4 km deep · 35 km away
36. 1.66 km NNE of Benicia, CaliforniaThu, Mar 29, 7:47 PM PST · 15521 days ago · 5 km deep · 61 km away
37. 2.67 km E of East Foothills, CaliforniaFri, Mar 30, 9:46 AM PST · 15521 days ago · 6 km deep · 74 km away
38. 2.47 km E of East Foothills, CaliforniaFri, Mar 30, 11:07 AM PST · 15521 days ago · 6 km deep · 74 km away
39. 1.57 km ESE of East Foothills, CaliforniaFri, Mar 30, 11:07 AM PST · 15521 days ago · 6 km deep · 75 km away
40. 1.67 km E of East Foothills, CaliforniaFri, Mar 30, 7:26 PM PST · 15520 days ago · 5 km deep · 74 km away
41. 2.05 km SE of Piedmont, CaliforniaSat, Mar 31, 11:02 AM PST · 15520 days ago · 11 km deep · 32 km away
42. 2.13 km ENE of San Leandro, CaliforniaWed, Apr 4, 8:31 AM PST · 15516 days ago · 6 km deep · 36 km away
43. 1.510 km ENE of Blackhawk, CaliforniaWed, Apr 4, 5:08 PM PST · 15515 days ago · 11 km deep · 66 km away
44. 2.12 km NNE of San Leandro, CaliforniaSat, Apr 7, 3:33 AM PST · 15513 days ago · 3 km deep · 33 km away
45. 1.68 km ENE of Blackhawk, CaliforniaSat, Apr 7, 8:10 AM PST · 15513 days ago · 10 km deep · 65 km away
46. 1.51 km ESE of Walnut Creek, CaliforniaSat, Apr 7, 7:42 PM PST · 15512 days ago · 10 km deep · 49 km away
47. 1.85 km SSW of Alamo, CaliforniaSat, Apr 7, 11:25 PM PST · 15512 days ago · 12 km deep · 43 km away
48. 2.33 km NE of San Leandro, CaliforniaSun, Apr 8, 5:40 AM PST · 15512 days ago · 5 km deep · 35 km away
49. 1.6Northern CaliforniaSun, Apr 8, 4:44 PM PST · 15511 days ago · 7 km deep · 3 km away
50. 1.92 km ENE of San Leandro, CaliforniaTue, Apr 10, 11:18 AM PST · 15510 days ago · 3 km deep · 35 km away
51. 1.53 km ENE of San Leandro, CaliforniaWed, Apr 11, 11:27 PM PST · 15508 days ago · 5 km deep · 35 km away
52. 1.92 km ENE of Pleasant Hill, CaliforniaThu, Apr 12, 2:28 PM PST · 15507 days ago · 12 km deep · 54 km away
53. 2.62 km NE of San Leandro, CaliforniaWed, Apr 18, 1:54 AM PST · 15502 days ago · 4 km deep · 34 km away
54. 1.78 km ESE of East Foothills, CaliforniaSat, Apr 21, 5:37 AM PST · 15499 days ago · 2 km deep · 76 km away
55. 1.912 km N of Morgan Hill, CaliforniaSun, Apr 22, 2:32 AM PST · 15498 days ago · 6 km deep · 88 km away
56. 6.2The 1984 Morgan Hill, California EarthquakeTue, Apr 24, 1:15 PM PST · 15495 days ago · 8 km deep · 82 km away
57. 3.915 km E of Seven Trees, CaliforniaTue, Apr 24, 1:20 PM PST · 15495 days ago · 6 km deep · 84 km away
58. 2.615 km E of Seven Trees, CaliforniaTue, Apr 24, 1:23 PM PST · 15495 days ago · 9 km deep · 84 km away
59. 3.415 km E of Seven Trees, CaliforniaTue, Apr 24, 1:23 PM PST · 15495 days ago · 5 km deep · 84 km away
60. 3.316 km N of Morgan Hill, CaliforniaTue, Apr 24, 1:24 PM PST · 15495 days ago · 8 km deep · 86 km away

The first 60 of 157.

Before

1. 2.02 km NW of Diablo, CaliforniaMon, Feb 27, 8:06 AM PST · 15553 days ago · 6 km deep · 52 km away
2. 2.32 km NNW of Diablo, CaliforniaSun, Feb 26, 10:01 AM PST · 15554 days ago · 7 km deep · 52 km away
3. 1.68 km NE of Corralitos, CaliforniaSun, Feb 26, 2:42 AM PST · 15554 days ago · 12 km deep · 96 km away
4. 1.710 km NNE of East Foothills, CaliforniaSat, Feb 25, 3:30 AM PST · 15555 days ago · 7 km deep · 66 km away
5. 1.92 km S of Fairview, CaliforniaFri, Feb 24, 6:48 PM PST · 15555 days ago · 7 km deep · 40 km away
6. 1.6Northern CaliforniaThu, Feb 23, 4:59 PM PST · 15556 days ago · 12 km deep · 34 km away
7. 1.64 km NNW of Union City, CaliforniaThu, Feb 23, 12:43 PM PST · 15556 days ago · 4 km deep · 42 km away
8. 1.714 km SSE of Livermore, CaliforniaThu, Feb 23, 3:45 AM PST · 15557 days ago · 6 km deep · 73 km away
9. 1.91 km NE of East Richmond Heights, CaliforniaWed, Feb 22, 11:58 PM PST · 15557 days ago · 8 km deep · 39 km away
10. 1.97 km E of East Foothills, CaliforniaWed, Feb 22, 3:06 PM PST · 15557 days ago · 8 km deep · 75 km away
11. 1.614 km E of Seven Trees, CaliforniaWed, Feb 22, 5:38 AM PST · 15558 days ago · 1 km deep · 83 km away
12. 1.74 km NNE of Kenwood, CaliforniaTue, Feb 21, 3:57 PM PST · 15558 days ago · 7 km deep · 90 km away
13. 2.38 km NE of Corralitos, CaliforniaSun, Feb 19, 5:47 PM PST · 15560 days ago · 12 km deep · 96 km away
14. 1.74 km E of Saint Helena, CaliforniaSun, Feb 19, 3:00 AM PST · 15561 days ago · 11 km deep · 97 km away
15. 1.74 km NE of Fremont, CaliforniaSat, Feb 18, 5:10 AM PST · 15562 days ago · 8 km deep · 48 km away
16. 1.91 km NNW of North Gate, CaliforniaFri, Feb 17, 1:10 PM PST · 15562 days ago · 12 km deep · 53 km away
17. 2.01 km NNW of North Gate, CaliforniaFri, Feb 17, 12:52 PM PST · 15562 days ago · 11 km deep · 53 km away
18. 2.01 km NW of North Gate, CaliforniaFri, Feb 17, 12:27 PM PST · 15562 days ago · 12 km deep · 53 km away
19. 1.75 km WSW of Glen Ellen, CaliforniaThu, Feb 16, 4:40 AM PST · 15564 days ago · 0 km deep · 78 km away
20. 2.15 km NNW of Moskowite Corner, CaliforniaSun, Feb 12, 2:47 PM PST · 15567 days ago · 15 km deep · 97 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc8094. Read Sun, Sep 27, 2026, 7:26 AM UTC.