M1.8 earthquake 17 km W of Samoa, California

Magnitude

1.8 (md), micro

Local time

Mon, Jul 4, 1983, 2:50 PM PDT

UTC

1983-07-04 21:50:28 UTC

Depth

-0.6 km (-0.4 mi), shallow

Epicenter

40.817° N, 124.392° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 24.0 km horizontally, 20.2 km in depth

Depth from

From location

Station coverage gap

301°, poorly surrounded by stations

Stations used

3

• Bayview, CaliforniaPopulation 2,510. Forecast18 kmWNW
• Eureka, CaliforniaPopulation 27,017. Forecast19 kmW
• Chico, CaliforniaPopulation 121,345. Forecast248 kmWNW

After

1. 2.013 km W of Junction City, CaliforniaTue, Jul 5, 4:28 AM PDT · 15793 days ago · 6 km deep · 100 km away
2. 2.010 km NE of Hydesville, CaliforniaTue, Jul 5, 5:24 PM PDT · 15792 days ago · 18 km deep · 37 km away
3. 3.020 km SW of Scotia, CaliforniaTue, Jul 5, 9:03 PM PDT · 15792 days ago · 25 km deep · 50 km away
4. 1.613 km W of Indianola, CaliforniaWed, Jul 6, 3:52 PM PDT · 15791 days ago · 21 km deep · 16 km away
5. 1.950 km SW of Ferndale, CaliforniaWed, Jul 6, 6:36 PM PDT · 15791 days ago · 23 km deep · 70 km away
6. 1.72 km NE of Myers Flat, CaliforniaWed, Jul 6, 9:48 PM PDT · 15791 days ago · 22 km deep · 75 km away
7. 1.626 km SSW of Ferndale, CaliforniaThu, Jul 7, 9:53 PM PDT · 15790 days ago · 19 km deep · 51 km away
8. 1.61 km SSW of Fields Landing, CaliforniaFri, Jul 8, 3:44 AM PDT · 15790 days ago · 9 km deep · 18 km away
9. 2.61 km WSW of Fields Landing, CaliforniaFri, Jul 8, 4:46 AM PDT · 15790 days ago · 10 km deep · 18 km away
10. 1.91 km SSW of Fields Landing, CaliforniaFri, Jul 8, 5:14 AM PDT · 15790 days ago · 10 km deep · 18 km away
11. 1.80 km SSW of Fields Landing, CaliforniaFri, Jul 8, 5:42 AM PDT · 15790 days ago · 9 km deep · 18 km away
12. 2.11 km SW of Fields Landing, CaliforniaFri, Jul 8, 6:05 AM PDT · 15790 days ago · 9 km deep · 18 km away
13. 1.92 km S of Mad River, CaliforniaSat, Jul 9, 11:43 AM PDT · 15788 days ago · 22 km deep · 87 km away
14. 1.9near the coast of Northern CaliforniaSun, Jul 10, 7:20 AM PDT · 15788 days ago · 19 km deep · 52 km away
15. 1.820 km SE of Indianola, CaliforniaSun, Jul 10, 12:43 PM PDT · 15787 days ago · 22 km deep · 45 km away
16. 2.911 km W of Orick, CaliforniaTue, Jul 12, 7:41 AM PDT · 15786 days ago · 10 km deep · 53 km away
17. 2.75 km W of Big Lagoon, CaliforniaTue, Jul 12, 8:09 AM PDT · 15786 days ago · 10 km deep · 42 km away
18. 2.59 km WSW of Ferndale, CaliforniaTue, Jul 12, 10:55 AM PDT · 15785 days ago · 25 km deep · 31 km away
19. 1.916 km SW of Scotia, CaliforniaTue, Jul 12, 3:09 PM PDT · 15785 days ago · 25 km deep · 51 km away
20. 2.19 km N of Mad River, CaliforniaTue, Jul 12, 4:10 PM PDT · 15785 days ago · 4 km deep · 81 km away
21. 2.17 km WNW of Big Lagoon, CaliforniaTue, Jul 12, 9:43 PM PDT · 15785 days ago · 11 km deep · 43 km away
22. 2.59 km NW of Big Lagoon, CaliforniaWed, Jul 13, 9:41 AM PDT · 15784 days ago · 10 km deep · 47 km away
23. 2.830 km WNW of Fields Landing, CaliforniaWed, Jul 13, 11:10 PM PDT · 15784 days ago · 24 km deep · 13 km away
24. 2.652 km W of Indianola, CaliforniaThu, Jul 14, 7:07 PM PDT · 15783 days ago · 27 km deep · 39 km away
25. 2.03 km N of Mad River, CaliforniaThu, Jul 14, 8:10 PM PDT · 15783 days ago · -1 km deep · 82 km away
26. 2.17 km SW of Benbow, CaliforniaFri, Jul 15, 12:01 AM PDT · 15783 days ago · -1 km deep · 99 km away
27. 1.618 km WSW of Scotia, CaliforniaFri, Jul 15, 1:31 AM PDT · 15783 days ago · 20 km deep · 46 km away
28. 2.127 km SW of Ferndale, CaliforniaFri, Jul 15, 9:14 AM PDT · 15782 days ago · 27 km deep · 46 km away
29. 1.76 km E of Redcrest, CaliforniaSat, Jul 16, 5:38 AM PDT · 15782 days ago · 23 km deep · 64 km away
30. 1.73 km W of Rio Dell, CaliforniaSat, Jul 16, 5:56 AM PDT · 15782 days ago · 20 km deep · 41 km away
31. 1.636 km SSW of Ferndale, CaliforniaSat, Jul 16, 3:15 PM PDT · 15781 days ago · 4 km deep · 59 km away
32. 2.715 km NNW of Hayfork, CaliforniaSat, Jul 16, 7:22 PM PDT · 15781 days ago · 21 km deep · 96 km away
33. 2.033 km SW of Ferndale, CaliforniaSat, Jul 16, 8:43 PM PDT · 15781 days ago · 19 km deep · 49 km away
34. 1.820 km WSW of Ferndale, CaliforniaSat, Jul 16, 10:41 PM PDT · 15781 days ago · 22 km deep · 37 km away
35. 1.633 km SSW of Ferndale, CaliforniaSat, Jul 16, 10:47 PM PDT · 15781 days ago · 19 km deep · 57 km away
36. 1.715 km WSW of Ferndale, CaliforniaSun, Jul 17, 12:43 AM PDT · 15781 days ago · 22 km deep · 32 km away
37. 1.637 km SSW of Ferndale, CaliforniaSun, Jul 17, 3:46 AM PDT · 15781 days ago · 14 km deep · 60 km away
38. 1.617 km SSW of Ferndale, CaliforniaSun, Jul 17, 1:12 PM PDT · 15780 days ago · 24 km deep · 42 km away
39. 2.582 km W of Ferndale, CaliforniaMon, Jul 18, 8:09 AM PDT · 15780 days ago · 5 km deep · 75 km away
40. 2.7near the coast of Northern CaliforniaTue, Jul 19, 6:01 AM PDT · 15779 days ago · 24 km deep · 56 km away
41. 2.6105 km W of Ferndale, CaliforniaTue, Jul 19, 7:31 AM PDT · 15779 days ago · 4 km deep · 96 km away
42. 2.515 km ENE of Fieldbrook, CaliforniaTue, Jul 19, 6:43 PM PDT · 15778 days ago · 5 km deep · 50 km away
43. 2.24 km SE of Blue Lake, CaliforniaWed, Jul 20, 4:47 AM PDT · 15778 days ago · 62 km deep · 37 km away
44. 1.927 km SW of Ferndale, CaliforniaWed, Jul 20, 9:25 AM PDT · 15777 days ago · 17 km deep · 49 km away
45. 2.033 km SSW of Ferndale, CaliforniaWed, Jul 20, 2:12 PM PDT · 15777 days ago · 22 km deep · 58 km away
46. 3.016 km WSW of Ferndale, CaliforniaWed, Jul 20, 4:25 PM PDT · 15777 days ago · 22 km deep · 36 km away
47. 1.56 km SSW of Ferndale, CaliforniaWed, Jul 20, 9:23 PM PDT · 15777 days ago · 24 km deep · 33 km away
48. 1.621 km NE of Hydesville, CaliforniaFri, Jul 22, 1:28 AM PDT · 15776 days ago · 21 km deep · 46 km away
49. 1.76 km E of Pine Hills, CaliforniaFri, Jul 22, 8:55 AM PDT · 15775 days ago · 24 km deep · 28 km away
50. 1.812 km WSW of Willow Creek, CaliforniaSat, Jul 23, 7:52 PM PDT · 15774 days ago · 8 km deep · 53 km away
51. 2.517 km SW of Willow Creek, CaliforniaSun, Jul 24, 12:43 AM PDT · 15774 days ago · 25 km deep · 51 km away
52. 2.522 km W of Indianola, CaliforniaSun, Jul 24, 5:11 PM PDT · 15773 days ago · 20 km deep · 16 km away
53. 1.626 km W of Indianola, CaliforniaSun, Jul 24, 5:13 PM PDT · 15773 days ago · 21 km deep · 18 km away
54. 2.035 km SW of Scotia, CaliforniaMon, Jul 25, 3:59 AM PDT · 15773 days ago · 23 km deep · 60 km away
55. 1.931 km SW of Ferndale, CaliforniaMon, Jul 25, 5:01 PM PDT · 15772 days ago · 22 km deep · 51 km away
56. 2.646 km SW of Ferndale, CaliforniaTue, Jul 26, 3:21 PM PDT · 15771 days ago · 17 km deep · 60 km away
57. 3.027 km SSW of Ferndale, CaliforniaWed, Jul 27, 1:10 AM PDT · 15771 days ago · 18 km deep · 51 km away
58. 3.228 km WNW of Samoa, CaliforniaWed, Jul 27, 8:57 AM PDT · 15770 days ago · 24 km deep · 13 km away
59. 2.015 km SW of Scotia, CaliforniaWed, Jul 27, 1:11 PM PDT · 15770 days ago · 34 km deep · 52 km away
60. 2.480 km WNW of Ferndale, CaliforniaThu, Jul 28, 10:35 AM PDT · 15769 days ago · 19 km deep · 67 km away

The first 60 of at least 200.

Before

1. 2.924 km SW of Ferndale, CaliforniaSun, Jul 3, 8:23 AM PDT · 15795 days ago · 23 km deep · 42 km away
2. 2.13 km NE of Redway, CaliforniaSun, Jul 3, 1:30 AM PDT · 15795 days ago · 20 km deep · 91 km away
3. 2.230 km WSW of Ferndale, CaliforniaSat, Jul 2, 11:24 PM PDT · 15795 days ago · 26 km deep · 39 km away
4. 1.65 km SE of Ferndale, CaliforniaSat, Jul 2, 5:28 PM PDT · 15795 days ago · 12 km deep · 34 km away
5. 2.346 km WSW of Ferndale, CaliforniaFri, Jul 1, 11:24 PM PDT · 15796 days ago · 19 km deep · 52 km away
6. 1.828 km SW of Ferndale, CaliforniaTue, Jun 28, 8:58 PM PDT · 15799 days ago · 26 km deep · 48 km away
7. 2.019 km SW of Ferndale, CaliforniaTue, Jun 28, 8:54 PM PDT · 15799 days ago · 24 km deep · 42 km away
8. 1.69 km NE of Phillipsville, CaliforniaTue, Jun 28, 1:07 AM PDT · 15800 days ago · 30 km deep · 83 km away
9. 1.627 km SW of Scotia, CaliforniaSun, Jun 26, 12:57 AM PDT · 15802 days ago · 12 km deep · 53 km away
10. 2.037 km WSW of Ferndale, CaliforniaSat, Jun 25, 9:59 PM PDT · 15802 days ago · 16 km deep · 51 km away
11. 2.229 km SW of Ferndale, CaliforniaSat, Jun 25, 5:59 PM PDT · 15802 days ago · 19 km deep · 46 km away
12. 1.727 km SW of Ferndale, CaliforniaSat, Jun 25, 9:57 AM PDT · 15802 days ago · 40 km deep · 48 km away
13. 1.722 km SW of Ferndale, CaliforniaSat, Jun 25, 9:33 AM PDT · 15802 days ago · 27 km deep · 42 km away
14. 3.139 km WSW of Ferndale, CaliforniaSat, Jun 25, 1:34 AM PDT · 15803 days ago · 23 km deep · 51 km away
15. 1.726 km SSW of Ferndale, CaliforniaFri, Jun 24, 9:27 AM PDT · 15803 days ago · 14 km deep · 51 km away
16. 1.525 km SW of Ferndale, CaliforniaThu, Jun 23, 2:15 PM PDT · 15804 days ago · 19 km deep · 47 km away
17. 1.65 km NNE of Redcrest, CaliforniaThu, Jun 23, 6:09 AM PDT · 15805 days ago · 22 km deep · 56 km away
18. 2.134 km SSW of Ferndale, CaliforniaThu, Jun 23, 4:32 AM PDT · 15805 days ago · 22 km deep · 57 km away
19. 3.138 km SW of Ferndale, CaliforniaWed, Jun 22, 7:35 PM PDT · 15805 days ago · 21 km deep · 57 km away
20. 1.56 km NNE of Hydesville, CaliforniaTue, Jun 21, 9:04 PM PDT · 15806 days ago · 25 km deep · 36 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1098089. Read Wed, Sep 30, 2026, 3:13 AM UTC.