M1.8 earthquake 11 km NW of Hayfork, California

Magnitude

1.8 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Tue, Jul 24, 1979, 3:25 PM PDT

UTC

1979-07-24 22:25:26 UTC

Depth

19.8 km (12.3 mi), shallow

Epicenter

40.617° N, 123.295° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 1.8 km horizontally, 2.5 km in depth

Depth from

From location

Station coverage gap

263°, poorly surrounded by stations

Stations used

5

• Hayfork, CaliforniaPopulation 2,368. Forecast12 kmNW
• Bayside, CaliforniaPopulation 17,132. Forecast69 kmESE
• Chico, CaliforniaPopulation 121,345. Forecast158 kmNW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast855 kmNNW

After

1. 1.98 km E of Mad River, CaliforniaThu, Jul 26, 4:30 AM PDT · 17234 days ago · 33 km deep · 20 km away
2. 1.75 km NNE of Redcrest, CaliforniaThu, Jul 26, 5:28 AM PDT · 17234 days ago · 1 km deep · 57 km away
3. 1.73 km WSW of Indianola, CaliforniaThu, Jul 26, 10:35 AM PDT · 17234 days ago · 8 km deep · 83 km away
4. 2.43 km WSW of Indianola, CaliforniaThu, Jul 26, 10:36 AM PDT · 17234 days ago · 8 km deep · 83 km away
5. 1.68 km SE of Blue Lake, CaliforniaSat, Jul 28, 1:53 PM PDT · 17232 days ago · -1 km deep · 57 km away
6. 2.019 km WSW of Ferndale, CaliforniaMon, Jul 30, 11:33 AM PDT · 17230 days ago · 21 km deep · 99 km away
7. 1.627 km SSW of Ferndale, CaliforniaMon, Jul 30, 8:31 PM PDT · 17230 days ago · 26 km deep · 98 km away
8. 1.913 km WNW of Hyampom, CaliforniaMon, Jul 30, 11:59 PM PDT · 17230 days ago · 5 km deep · 26 km away
9. 1.67 km W of Rio Dell, CaliforniaWed, Aug 1, 1:09 AM PDT · 17229 days ago · 19 km deep · 78 km away
10. 2.26 km W of Rio Dell, CaliforniaWed, Aug 1, 5:53 PM PDT · 17228 days ago · 19 km deep · 76 km away
11. 3.319 km WSW of Weott, CaliforniaThu, Aug 2, 5:18 AM PDT · 17227 days ago · 4 km deep · 82 km away
12. 1.510 km NE of Hydesville, CaliforniaThu, Aug 2, 5:35 AM PDT · 17227 days ago · 21 km deep · 59 km away
13. 1.53 km S of Humboldt Hill, CaliforniaThu, Aug 2, 5:42 AM PDT · 17227 days ago · 17 km deep · 76 km away
14. 1.719 km WSW of Weott, CaliforniaThu, Aug 2, 7:41 AM PDT · 17227 days ago · 5 km deep · 81 km away
15. 2.37 km NNE of Hydesville, CaliforniaSat, Aug 4, 3:20 AM PDT · 17225 days ago · 18 km deep · 64 km away
16. 2.113 km WNW of Fields Landing, CaliforniaSat, Aug 4, 6:12 AM PDT · 17225 days ago · 24 km deep · 92 km away
17. 1.611 km W of Mad River, CaliforniaSun, Aug 5, 1:46 AM PDT · 17225 days ago · 3 km deep · 35 km away
18. 1.93 km SSW of Willow Creek, CASun, Aug 5, 12:15 PM PDT · 17224 days ago · 21 km deep · 44 km away
19. 2.97 km E of Covelo, CaliforniaTue, Aug 7, 9:18 AM PDT · 17222 days ago · -1 km deep · 92 km away
20. 1.97 km WNW of Ruth, CaliforniaWed, Aug 8, 4:02 AM PDT · 17221 days ago · 20 km deep · 37 km away
21. 1.52 km SSW of Scotia, CaliforniaSun, Aug 12, 7:09 AM PDT · 17217 days ago · 23 km deep · 71 km away
22. 1.721 km WNW of Manila, CaliforniaSun, Aug 12, 7:36 AM PDT · 17217 days ago · 9 km deep · 98 km away
23. 1.56 km W of Mad River, CaliforniaMon, Aug 13, 2:02 AM PDT · 17217 days ago · 26 km deep · 30 km away
24. 1.69 km ESE of Hyampom, CaliforniaMon, Aug 13, 10:06 PM PDT · 17216 days ago · 44 km deep · 5 km away
25. 1.53 km ENE of Redway, CaliforniaWed, Aug 15, 3:25 AM PDT · 17214 days ago · 21 km deep · 68 km away
26. 1.618 km WSW of Ferndale, CaliforniaFri, Aug 17, 1:25 AM PDT · 17213 days ago · 25 km deep · 98 km away
27. 1.6near the coast of Northern CaliforniaFri, Aug 17, 3:15 AM PDT · 17212 days ago · 15 km deep · 99 km away
28. 1.59 km NE of Redcrest, CaliforniaFri, Aug 17, 7:05 PM PDT · 17212 days ago · 19 km deep · 52 km away
29. 1.727 km SSW of Scotia, CaliforniaSun, Aug 19, 6:13 AM PDT · 17210 days ago · 20 km deep · 90 km away
30. 1.64 km NNE of Blue Lake, CaliforniaMon, Aug 20, 10:33 AM PDT · 17209 days ago · 26 km deep · 66 km away
31. 2.414 km S of Scotia, CaliforniaTue, Aug 21, 9:45 AM PDT · 17208 days ago · 29 km deep · 77 km away
32. 1.813 km SSW of Scotia, CaliforniaTue, Aug 21, 10:02 AM PDT · 17208 days ago · 29 km deep · 77 km away
33. 1.625 km WSW of Weott, CaliforniaThu, Aug 23, 11:09 AM PDT · 17206 days ago · 7 km deep · 87 km away
34. 2.09 km NE of Redcrest, CaliforniaFri, Aug 24, 12:24 AM PDT · 17206 days ago · 19 km deep · 52 km away
35. 1.616 km ESE of Pine Hills, CaliforniaSun, Aug 26, 10:02 AM PDT · 17203 days ago · 21 km deep · 57 km away
36. 1.86 km SSW of Scotia, CaliforniaSun, Aug 26, 3:50 PM PDT · 17203 days ago · 28 km deep · 73 km away
37. 1.714 km WNW of Ferndale, CaliforniaWed, Aug 29, 2:59 AM PDT · 17201 days ago · 6 km deep · 96 km away
38. 1.93 km WSW of Douglas City, CaliforniaFri, Aug 31, 4:16 AM PDT · 17198 days ago · 9 km deep · 27 km away
39. 3.28 km NNE of Mad River, CaliforniaFri, Aug 31, 5:40 PM PDT · 17198 days ago · 29 km deep · 18 km away
40. 1.911 km WSW of Ferndale, CaliforniaSat, Sep 1, 11:20 AM PDT · 17197 days ago · 24 km deep · 92 km away
41. 2.5near the coast of Northern CaliforniaSun, Sep 2, 2:13 AM PDT · 17197 days ago · 18 km deep · 93 km away
42. 2.68 km NE of Mad River, CaliforniaWed, Sep 5, 11:59 AM PDT · 17193 days ago · 31 km deep · 18 km away
43. 1.811 km E of Blue Lake, CaliforniaThu, Sep 6, 5:56 PM PDT · 17192 days ago · -1 km deep · 56 km away
44. 1.527 km SW of Scotia, CaliforniaMon, Sep 10, 4:55 AM PDT · 17188 days ago · 6 km deep · 95 km away
45. 2.46 km ESE of Indianola, CaliforniaSat, Sep 15, 5:18 PM PDT · 17183 days ago · 25 km deep · 63 km away
46. 2.110 km WSW of Rio Dell, CaliforniaSat, Sep 15, 7:32 PM PDT · 17183 days ago · 17 km deep · 81 km away
47. 1.59 km ENE of Benbow, CaliforniaWed, Sep 19, 9:52 PM PDT · 17179 days ago · 11 km deep · 67 km away

Before

1. 1.73 km SW of Loleta, CaliforniaSun, Jul 22, 9:01 PM PDT · 17238 days ago · 20 km deep · 81 km away
2. 1.615 km ESE of Indianola, CaliforniaSun, Jul 22, 2:48 PM PDT · 17238 days ago · 24 km deep · 55 km away
3. 1.7Northern CaliforniaSun, Jul 22, 7:02 AM PDT · 17238 days ago · 20 km deep · 64 km away
4. 1.625 km SW of Scotia, CaliforniaSat, Jul 21, 10:45 PM PDT · 17239 days ago · 16 km deep · 94 km away
5. 2.241 km SW of Etna, CaliforniaSat, Jul 21, 5:26 PM PDT · 17239 days ago · 39 km deep · 65 km away
6. 2.817 km WSW of Paskenta, CaliforniaFri, Jul 20, 1:35 AM PDT · 17241 days ago · 2 km deep · 99 km away
7. 2.625 km SSW of Ferndale, CaliforniaTue, Jul 17, 4:18 PM PDT · 17243 days ago · 18 km deep · 99 km away
8. 1.717 km W of Samoa, CaliforniaTue, Jul 17, 7:53 AM PDT · 17243 days ago · 20 km deep · 96 km away
9. 1.55 km NNW of Redway, CaliforniaSun, Jul 15, 9:46 PM PDT · 17245 days ago · 18 km deep · 69 km away
10. 1.613 km W of Ferndale, CaliforniaSun, Jul 15, 7:10 PM PDT · 17245 days ago · 18 km deep · 95 km away
11. 3.15 km N of Redway, CaliforniaSun, Jul 15, 6:34 PM PDT · 17245 days ago · 19 km deep · 68 km away
12. 1.98 km SW of Burnt Ranch, CaliforniaFri, Jul 13, 8:48 PM PDT · 17247 days ago · 27 km deep · 26 km away
13. 2.93 km NNW of Ferndale, CaliforniaFri, Jul 13, 2:55 AM PDT · 17248 days ago · 18 km deep · 83 km away
14. 1.62 km NNE of Blue Lake, CaliforniaThu, Jul 12, 4:57 PM PDT · 17248 days ago · 3 km deep · 66 km away
15. 1.924 km WNW of Hyampom, CaliforniaThu, Jul 12, 6:06 AM PDT · 17248 days ago · 22 km deep · 37 km away
16. 1.86 km NNW of Redway, CaliforniaTue, Jul 10, 2:43 PM PDT · 17250 days ago · 19 km deep · 69 km away
17. 2.213 km S of Ferndale, CaliforniaMon, Jul 9, 10:16 AM PDT · 17251 days ago · 24 km deep · 86 km away
18. 1.721 km SW of Ferndale, CaliforniaSun, Jul 8, 7:55 PM PDT · 17252 days ago · 21 km deep · 98 km away
19. 1.87 km SE of Scotia, CaliforniaSun, Jul 8, 8:15 AM PDT · 17252 days ago · 23 km deep · 66 km away
20. 1.831 km SSW of Ferndale, CaliforniaSun, Jul 8, 7:12 AM PDT · 17252 days ago · 11 km deep · 99 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1046740. Read Thu, Oct 1, 2026, 9:39 PM UTC.