M2.0 earthquake 14km E of Angwin, CA

Magnitude

2.0 (md), micro

Local time

Tue, Dec 18, 1984, 11:46 PM PST

UTC

1984-12-19 07:46:43 UTC

Depth

10.6 km (6.6 mi), shallow

Epicenter

38.587° N, 122.289° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.3 km horizontally, 1.0 km in depth

Magnitude uncertainty

±0.09

Depth from

From location

Station coverage gap

127°

Stations used

12

• Angwin, CaliforniaPopulation 3,051. Forecast14 kmE
• Napa, CaliforniaPopulation 80,434. Forecast32 kmN
• Santa Rosa, CaliforniaPopulation 178,127. Forecast40 kmENE
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast621 kmNW

After

1. 2.18 km W of Cobb, CaliforniaWed, Dec 19, 5:54 PM PST · 15259 days ago · 1 km deep · 53 km away
2. 3.08 km W of Cobb, CaliforniaWed, Dec 19, 5:55 PM PST · 15259 days ago · 1 km deep · 53 km away
3. 1.58 km W of Cobb, CaliforniaWed, Dec 19, 5:56 PM PST · 15259 days ago · 1 km deep · 53 km away
4. 1.88 km W of Cobb, CaliforniaWed, Dec 19, 6:04 PM PST · 15259 days ago · 1 km deep · 53 km away
5. 1.58 km W of Cobb, CaliforniaWed, Dec 19, 6:15 PM PST · 15258 days ago · 1 km deep · 53 km away
6. 2.17 km W of Cobb, CaliforniaWed, Dec 19, 6:46 PM PST · 15258 days ago · 0 km deep · 52 km away
7. 1.616 km WSW of Cloverdale, CaliforniaThu, Dec 20, 10:29 AM PST · 15258 days ago · 9 km deep · 80 km away
8. 1.74 km W of Glen Ellen, CaliforniaFri, Dec 21, 12:05 AM PST · 15257 days ago · 9 km deep · 35 km away
9. 2.55 km WSW of Cobb, CaliforniaFri, Dec 21, 3:28 AM PST · 15257 days ago · 1 km deep · 50 km away
10. 1.67 km W of Cobb, CaliforniaFri, Dec 21, 12:25 PM PST · 15257 days ago · 1 km deep · 52 km away
11. 1.65 km W of Cobb, CaliforniaFri, Dec 21, 11:43 PM PST · 15256 days ago · 1 km deep · 50 km away
12. 1.98 km W of Cobb, CaliforniaSat, Dec 22, 1:00 AM PST · 15256 days ago · 1 km deep · 53 km away
13. 3.45 km SW of Cobb, CaliforniaSat, Dec 22, 7:33 AM PST · 15256 days ago · 0 km deep · 48 km away
14. 3.05 km SW of Cobb, CaliforniaSat, Dec 22, 7:34 AM PST · 15256 days ago · 0 km deep · 47 km away
15. 1.55 km SW of Cobb, CaliforniaSat, Dec 22, 7:34 AM PST · 15256 days ago · 1 km deep · 47 km away
16. 1.85 km SW of Cobb, CaliforniaSat, Dec 22, 7:37 AM PST · 15256 days ago · 0 km deep · 48 km away
17. 2.7Northern CaliforniaSat, Dec 22, 7:38 AM PST · 15256 days ago · 0 km deep · 48 km away
18. 1.8Northern CaliforniaSat, Dec 22, 7:47 AM PST · 15256 days ago · 1 km deep · 47 km away
19. 1.56 km SW of Cobb, CaliforniaSat, Dec 22, 8:38 AM PST · 15256 days ago · 0 km deep · 47 km away
20. 2.111 km NE of Talmage, CaliforniaSat, Dec 22, 12:57 PM PST · 15256 days ago · 7 km deep · 96 km away
21. 1.67 km WSW of Cobb, CaliforniaSat, Dec 22, 10:41 PM PST · 15255 days ago · 1 km deep · 51 km away
22. 1.53 km WSW of Calistoga, CaliforniaSun, Dec 23, 1:58 AM PST · 15255 days ago · 4 km deep · 29 km away
23. 1.55 km WSW of Cobb, CaliforniaSun, Dec 23, 2:58 AM PST · 15255 days ago · 0 km deep · 49 km away
24. 2.26 km W of Cobb, CaliforniaSun, Dec 23, 4:10 AM PST · 15255 days ago · 3 km deep · 51 km away
25. 2.56 km W of Cobb, CaliforniaSun, Dec 23, 6:17 AM PST · 15255 days ago · 4 km deep · 51 km away
26. 1.56 km W of Cobb, CaliforniaMon, Dec 24, 12:16 AM PST · 15254 days ago · 3 km deep · 51 km away
27. 1.87 km W of Cobb, CaliforniaMon, Dec 24, 3:08 AM PST · 15254 days ago · 3 km deep · 52 km away
28. 1.68 km W of Cobb, CaliforniaMon, Dec 24, 8:28 AM PST · 15254 days ago · 0 km deep · 52 km away
29. 1.67 km W of Cobb, CaliforniaMon, Dec 24, 10:17 AM PST · 15254 days ago · 1 km deep · 53 km away
30. 1.53 km SW of Cobb, CaliforniaMon, Dec 24, 10:31 AM PST · 15254 days ago · 12 km deep · 46 km away
31. 1.56 km ESE of Hopland, CaliforniaTue, Dec 25, 3:18 AM PST · 15253 days ago · 5 km deep · 77 km away
32. 1.95 km W of Cobb, CaliforniaTue, Dec 25, 4:18 AM PST · 15253 days ago · 0 km deep · 50 km away
33. 1.87 km WSW of Cobb, CaliforniaTue, Dec 25, 11:50 AM PST · 15253 days ago · 0 km deep · 52 km away
34. 2.05 km WNW of Cobb, CaliforniaWed, Dec 26, 10:33 PM PST · 15251 days ago · 1 km deep · 51 km away
35. 1.86 km W of Cobb, CaliforniaWed, Dec 26, 10:33 PM PST · 15251 days ago · 3 km deep · 52 km away
36. 1.54 km WSW of Cobb, CaliforniaWed, Dec 26, 10:39 PM PST · 15251 days ago · 1 km deep · 48 km away
37. 1.96 km WSW of Cobb, CaliforniaThu, Dec 27, 11:16 AM PST · 15251 days ago · 3 km deep · 50 km away
38. 1.87 km W of Cobb, CaliforniaThu, Dec 27, 2:57 PM PST · 15251 days ago · 3 km deep · 52 km away
39. 2.73 km NNE of Santa Rosa, CaliforniaFri, Dec 28, 3:09 AM PST · 15250 days ago · 8 km deep · 38 km away
40. 1.81 km SSW of Kenwood, CaliforniaFri, Dec 28, 6:06 AM PST · 15250 days ago · 4 km deep · 31 km away
41. 1.68 km WSW of Cobb, CaliforniaFri, Dec 28, 9:48 AM PST · 15250 days ago · 3 km deep · 51 km away
42. 1.74 km W of Cobb, CaliforniaSat, Dec 29, 6:51 AM PST · 15249 days ago · -1 km deep · 49 km away
43. 3.06 km W of Cobb, CaliforniaSat, Dec 29, 8:21 AM PST · 15249 days ago · 3 km deep · 51 km away
44. 2.77 km WSW of Cobb, CaliforniaSat, Dec 29, 3:50 PM PST · 15249 days ago · 1 km deep · 51 km away
45. 1.94 km WSW of Cobb, CaliforniaSat, Dec 29, 4:10 PM PST · 15249 days ago · 1 km deep · 48 km away
46. 1.66 km W of Cobb, CaliforniaSun, Dec 30, 4:38 AM PST · 15248 days ago · 2 km deep · 51 km away
47. 1.87 km W of Cobb, CaliforniaSun, Dec 30, 6:11 PM PST · 15248 days ago · 0 km deep · 52 km away
48. 2.07 km W of Cobb, CaliforniaSun, Dec 30, 8:13 PM PST · 15247 days ago · 1 km deep · 52 km away
49. 2.5Northern CaliforniaSun, Dec 30, 8:42 PM PST · 15247 days ago · 9 km deep · 95 km away
50. 1.67 km WSW of Cobb, CaliforniaMon, Dec 31, 3:38 PM PST · 15247 days ago · 0 km deep · 51 km away
51. 1.66 km W of Cobb, CaliforniaMon, Dec 31, 6:49 PM PST · 15246 days ago · 1 km deep · 52 km away
52. 1.66 km WSW of Cobb, CaliforniaMon, Dec 31, 7:03 PM PST · 15246 days ago · 0 km deep · 50 km away
53. 1.51 km SE of San Ramon, CaliforniaMon, Dec 31, 8:49 PM PST · 15246 days ago · 9 km deep · 95 km away
54. 2.51 km SE of San Ramon, CaliforniaTue, Jan 1, 11:55 AM PST · 15246 days ago · 9 km deep · 95 km away
55. 1.67 km WSW of Cobb, CaliforniaTue, Jan 1, 11:21 PM PST · 15245 days ago · 3 km deep · 51 km away
56. 2.48 km WSW of Cobb, CaliforniaWed, Jan 2, 5:12 AM PST · 15245 days ago · -1 km deep · 52 km away
57. 2.45 km W of Cobb, CaliforniaWed, Jan 2, 3:12 PM PST · 15245 days ago · 0 km deep · 51 km away
58. 1.75 km W of Cobb, CaliforniaWed, Jan 2, 3:12 PM PST · 15245 days ago · 0 km deep · 51 km away
59. 1.75 km SW of Cobb, CaliforniaWed, Jan 2, 5:53 PM PST · 15245 days ago · 1 km deep · 48 km away
60. 1.96 km W of Cobb, CaliforniaThu, Jan 3, 5:17 AM PST · 15244 days ago · 3 km deep · 51 km away

The first 60 of 191.

Before

1. 3.05 km SW of Cobb, CaliforniaTue, Dec 18, 6:40 PM PST · 15259 days ago · 1 km deep · 48 km away
2. 1.99 km W of Hopland, CaliforniaTue, Dec 18, 4:09 PM PST · 15260 days ago · 4 km deep · 92 km away
3. 2.24 km WSW of Cobb, CaliforniaTue, Dec 18, 3:42 PM PST · 15260 days ago · 1 km deep · 48 km away
4. 1.87 km W of Cobb, CaliforniaTue, Dec 18, 11:04 AM PST · 15260 days ago · 0 km deep · 52 km away
5. 1.77 km SSE of Kelseyville, CaliforniaTue, Dec 18, 9:02 AM PST · 15260 days ago · 6 km deep · 58 km away
6. 1.67 km W of Calistoga, CaliforniaTue, Dec 18, 6:08 AM PST · 15260 days ago · 2 km deep · 33 km away
7. 1.97 km WSW of Cobb, CaliforniaTue, Dec 18, 4:52 AM PST · 15260 days ago · 1 km deep · 51 km away
8. 2.17 km WSW of Cobb, CaliforniaMon, Dec 17, 6:19 PM PST · 15260 days ago · 1 km deep · 51 km away
9. 2.1Northern CaliforniaMon, Dec 17, 5:08 PM PST · 15261 days ago · 2 km deep · 51 km away
10. 1.89 km W of Cobb, CaliforniaMon, Dec 17, 5:34 AM PST · 15261 days ago · 1 km deep · 54 km away
11. 2.05 km SW of Cobb, CaliforniaSun, Dec 16, 8:42 PM PST · 15261 days ago · 1 km deep · 48 km away
12. 1.84 km W of Cobb, CaliforniaSun, Dec 16, 5:23 PM PST · 15262 days ago · 1 km deep · 50 km away
13. 2.14 km W of Cobb, CaliforniaSun, Dec 16, 11:42 AM PST · 15262 days ago · 0 km deep · 50 km away
14. 1.58 km W of Cobb, CaliforniaSun, Dec 16, 4:32 AM PST · 15262 days ago · 0 km deep · 53 km away
15. 1.93 km SW of Cobb, CaliforniaSun, Dec 16, 3:06 AM PST · 15262 days ago · 1 km deep · 46 km away
16. 1.65 km WSW of Cobb, CaliforniaSat, Dec 15, 2:23 PM PST · 15263 days ago · 1 km deep · 49 km away
17. 2.13 km SW of Cobb, CaliforniaSat, Dec 15, 5:49 AM PST · 15263 days ago · 1 km deep · 46 km away
18. 2.16 km W of Cobb, CaliforniaFri, Dec 14, 9:31 PM PST · 15263 days ago · 3 km deep · 52 km away
19. 1.74 km WSW of Cobb, CaliforniaFri, Dec 14, 9:05 AM PST · 15264 days ago · 1 km deep · 48 km away
20. 1.75 km NNE of Windsor, CaliforniaFri, Dec 14, 5:06 AM PST · 15264 days ago · 2 km deep · 45 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc34991. Read Tue, Sep 29, 2026, 1:43 PM UTC.