M1.6 earthquake 20 km S of Avenal, California

Magnitude

1.6 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Fri, Dec 9, 1977, 4:05 AM PST

UTC

1977-12-09 12:05:45 UTC

Depth

21.6 km (13.4 mi), shallow

Epicenter

35.825° N, 120.153° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 4.7 km horizontally, 0.8 km in depth

Magnitude uncertainty

±0.10

Depth from

From location

Station coverage gap

309°, poorly surrounded by stations

Stations used

15

• Avenal, CaliforniaPopulation 13,301. Forecast20 kmS
• Visalia, CaliforniaPopulation 130,104. Forecast96 kmSW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast263 kmNW

After

1. 1.725 km W of Coalinga, CaliforniaSat, Dec 10, 11:20 AM PST · 17830 days ago · 6 km deep · 59 km away
2. 2.222 km NE of San Lucas, CaliforniaSun, Dec 11, 7:44 PM PST · 17829 days ago · 7 km deep · 76 km away
3. 2.021km SW of Alpaugh, CAMon, Dec 12, 5:17 AM PST · 17829 days ago · 6 km deep · 45 km away
4. 1.923 km NW of Parkfield, CaliforniaMon, Dec 12, 6:35 PM PST · 17828 days ago · 7 km deep · 49 km away
5. 1.923 km ENE of King City, CaliforniaTue, Dec 13, 9:13 AM PST · 17827 days ago · 4 km deep · 88 km away
6. 2.420 km NW of Parkfield, CaliforniaWed, Dec 14, 4:28 AM PST · 17827 days ago · 8 km deep · 46 km away
7. 2.222 km ENE of San Ardo, CaliforniaThu, Dec 15, 12:02 AM PST · 17826 days ago · 3 km deep · 57 km away
8. 1.621 km NW of Parkfield, CaliforniaThu, Dec 15, 8:49 AM PST · 17826 days ago · 3 km deep · 47 km away
9. 3.16 km NW of Parkfield, CaliforniaFri, Dec 16, 2:41 AM PST · 17825 days ago · 10 km deep · 33 km away
10. 1.820 km NW of Parkfield, CaliforniaFri, Dec 16, 2:58 AM PST · 17825 days ago · 8 km deep · 46 km away
11. 2.411 km NW of Parkfield, CaliforniaFri, Dec 16, 7:48 AM PST · 17825 days ago · 8 km deep · 37 km away
12. 1.56 km WSW of Paso Robles, CaliforniaFri, Dec 16, 10:29 AM PST · 17824 days ago · 5 km deep · 60 km away
13. 1.920 km NW of Parkfield, CaliforniaSun, Dec 18, 10:28 AM PST · 17822 days ago · 8 km deep · 46 km away
14. 1.620 km NW of Parkfield, CaliforniaSun, Dec 18, 10:51 AM PST · 17822 days ago · 8 km deep · 46 km away
15. 2.010 km SSW of Oak Shores, CaliforniaWed, Dec 21, 10:14 AM PST · 17819 days ago · 6 km deep · 81 km away
16. 1.623 km NW of Parkfield, CaliforniaFri, Dec 23, 1:13 AM PST · 17818 days ago · 0 km deep · 49 km away
17. 2.16km NNE of Avila Beach, CASun, Dec 25, 10:44 PM PST · 17815 days ago · 18 km deep · 82 km away
18. 2.024 km NE of King City, CaliforniaTue, Dec 27, 2:33 AM PST · 17814 days ago · 4 km deep · 95 km away
19. 2.510 km SSE of Parkfield, CaliforniaTue, Dec 27, 10:56 AM PST · 17813 days ago · 7 km deep · 20 km away
20. 3.4Central CaliforniaTue, Dec 27, 6:59 PM PST · 17813 days ago · 8 km deep · 19 km away
21. 2.27 km SSE of Parkfield, CaliforniaTue, Dec 27, 7:06 PM PST · 17813 days ago · 8 km deep · 21 km away
22. 3.012 km SE of Parkfield, CaliforniaWed, Dec 28, 4:21 AM PST · 17813 days ago · 8 km deep · 18 km away
23. 2.322 km NE of San Lucas, CaliforniaFri, Dec 30, 9:49 AM PST · 17810 days ago · 6 km deep · 80 km away
24. 1.917 km NW of Parkfield, CaliforniaMon, Jan 2, 11:38 PM PST · 17807 days ago · 3 km deep · 43 km away
25. 1.823 km NE of San Lucas, CaliforniaThu, Jan 5, 5:25 PM PST · 17804 days ago · 6 km deep · 83 km away
26. 1.922 km NE of San Lucas, CaliforniaFri, Jan 6, 3:46 PM PST · 17803 days ago · 7 km deep · 79 km away
27. 2.914 km W of Oak Shores, CaliforniaSat, Jan 7, 5:53 PM PST · 17802 days ago · 12 km deep · 89 km away
28. 2.318 km SSW of Three Rocks, CaliforniaSun, Jan 8, 9:09 PM PST · 17801 days ago · 9 km deep · 64 km away
29. 2.65 km S of Oak Shores, CaliforniaThu, Jan 12, 5:31 AM PST · 17798 days ago · 7 km deep · 76 km away
30. 2.224 km ENE of San Ardo, CaliforniaFri, Jan 13, 1:29 AM PST · 17797 days ago · 0 km deep · 54 km away
31. 2.46 km SSW of Oak Shores, CaliforniaMon, Jan 16, 10:19 AM PST · 17793 days ago · 7 km deep · 79 km away
32. 2.01 km SE of Oak Shores, CaliforniaSun, Jan 22, 7:33 AM PST · 17788 days ago · 9 km deep · 74 km away
33. 1.77 km SSW of Oak Shores, CaliforniaSun, Jan 22, 7:36 AM PST · 17788 days ago · 5 km deep · 79 km away
34. 1.914 km WSW of Coalinga, CaliforniaMon, Jan 23, 10:01 PM PST · 17786 days ago · 3 km deep · 42 km away
35. 1.814 km WSW of Coalinga, CaliforniaMon, Jan 23, 10:03 PM PST · 17786 days ago · 1 km deep · 41 km away
36. 2.023 km NE of San Ardo, CaliforniaSat, Jan 28, 4:54 AM PST · 17782 days ago · 7 km deep · 68 km away
37. 1.89 km NW of Parkfield, CaliforniaSun, Jan 29, 6:27 PM PST · 17780 days ago · 3 km deep · 35 km away
38. 1.822 km ENE of San Lucas, CaliforniaMon, Jan 30, 3:17 AM PST · 17780 days ago · 4 km deep · 73 km away
39. 1.922 km ENE of San Lucas, CaliforniaMon, Jan 30, 3:55 AM PST · 17780 days ago · 7 km deep · 73 km away
40. 1.79 km SSW of Oak Shores, CaliforniaMon, Jan 30, 8:00 AM PST · 17780 days ago · 3 km deep · 80 km away
41. 2.123 km NE of King City, CaliforniaMon, Jan 30, 8:30 AM PST · 17780 days ago · 7 km deep · 94 km away
42. 1.633km S of Simmler, CASat, Feb 4, 5:41 PM PST · 17774 days ago · 6 km deep · 86 km away
43. 2.133 km W of Three Rocks, CaliforniaSun, Feb 5, 2:55 AM PST · 17774 days ago · 8 km deep · 95 km away
44. 3.111km N of Avenal, CASun, Feb 5, 2:58 PM PST · 17773 days ago · 6 km deep · 31 km away
45. 2.16 km NNW of Avenal, CaliforniaSun, Feb 5, 6:00 PM PST · 17773 days ago · 13 km deep · 27 km away
46. 2.37 km NNW of Avenal, CaliforniaMon, Feb 6, 1:24 AM PST · 17773 days ago · 12 km deep · 27 km away
47. 1.97 km NNW of Avenal, CaliforniaMon, Feb 6, 5:21 PM PST · 17772 days ago · 13 km deep · 26 km away
48. 2.08 km N of Avenal, CaliforniaTue, Feb 7, 12:47 AM PST · 17772 days ago · 14 km deep · 29 km away

Before

1. 1.926km SSW of Alpaugh, CAMon, Dec 5, 11:17 PM PST · 17835 days ago · 6 km deep · 48 km away
2. 2.022 km NE of San Ardo, CaliforniaSat, Dec 3, 4:03 PM PST · 17837 days ago · 6 km deep · 66 km away
3. 2.219 km NW of Parkfield, CaliforniaSat, Dec 3, 12:50 PM PST · 17837 days ago · 4 km deep · 45 km away
4. 1.69 km W of Oak Shores, CaliforniaSat, Dec 3, 10:44 AM PST · 17837 days ago · 7 km deep · 84 km away
5. 1.918 km NW of Parkfield, CaliforniaSat, Dec 3, 10:41 AM PST · 17837 days ago · 4 km deep · 43 km away
6. 1.912 km NE of Cambria, CaliforniaFri, Dec 2, 4:30 PM PST · 17838 days ago · 1 km deep · 77 km away
7. 1.53 km SSE of Bradley, CaliforniaWed, Nov 30, 10:35 AM PST · 17840 days ago · 6 km deep · 57 km away
8. 2.72 km S of Bradley, CaliforniaWed, Nov 30, 10:33 AM PST · 17840 days ago · 7 km deep · 59 km away
9. 2.16 km NW of Parkfield, CaliforniaWed, Nov 30, 5:51 AM PST · 17841 days ago · 10 km deep · 33 km away
10. 3.06 km NW of Parkfield, CaliforniaTue, Nov 29, 10:22 AM PST · 17841 days ago · 10 km deep · 32 km away
11. 3.76 km NW of Parkfield, CaliforniaTue, Nov 29, 8:42 AM PST · 17842 days ago · 11 km deep · 33 km away
12. 1.517 km NW of Parkfield, CaliforniaTue, Nov 29, 4:06 AM PST · 17842 days ago · 6 km deep · 43 km away
13. 1.923 km NE of King City, CaliforniaMon, Nov 28, 7:20 PM PST · 17842 days ago · 3 km deep · 89 km away
14. 1.824 km WSW of Coalinga, CaliforniaThu, Nov 24, 4:43 PM PST · 17846 days ago · 6 km deep · 50 km away
15. 2.324 km WSW of Coalinga, CaliforniaThu, Nov 24, 9:59 AM PST · 17846 days ago · 7 km deep · 50 km away
16. 2.423 km NW of Parkfield, CaliforniaThu, Nov 24, 6:30 AM PST · 17847 days ago · 9 km deep · 48 km away
17. 1.822 km ENE of San Lucas, CaliforniaTue, Nov 22, 10:36 AM PST · 17848 days ago · 7 km deep · 71 km away
18. 1.928 km WSW of Three Rocks, CaliforniaSat, Nov 19, 7:12 PM PST · 17851 days ago · 11 km deep · 83 km away
19. 2.011 km SSW of Oak Shores, CaliforniaThu, Nov 17, 11:12 PM PST · 17853 days ago · 5 km deep · 81 km away
20. 1.79 km SSW of Oak Shores, CaliforniaThu, Nov 17, 7:14 PM PST · 17853 days ago · 0 km deep · 80 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1038073. Read Mon, Oct 5, 2026, 4:25 AM UTC.