M2.0 earthquake 4 km NNW of Diablo, California

Magnitude

2.0 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Sat, Apr 28, 1990, 12:46 AM PDT

UTC

1990-04-28 07:46:20 UTC

Depth

5.4 km (3.4 mi), shallow

Epicenter

37.871° N, 121.972° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.2 km horizontally, 0.6 km in depth

Magnitude uncertainty

±0.16

Depth from

From location

Station coverage gap

63°

Stations used

18

• Diablo, CaliforniaPopulation 1,158. Forecast4 kmNNW
• Alamo, CaliforniaPopulation 14,570. Forecast6 kmENE
• Concord, CaliforniaPopulation 128,667. Forecast13 kmSSE
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast541 kmNW

After

1. 1.91 km E of Alamo, CaliforniaSat, Apr 28, 1:14 AM PDT · 13307 days ago · 5 km deep · 4 km away
2. 2.41 km ENE of Alamo, CaliforniaSat, Apr 28, 1:14 AM PDT · 13307 days ago · 7 km deep · 5 km away
3. 1.63 km ENE of Alamo, CaliforniaSat, Apr 28, 1:16 AM PDT · 13307 days ago · 3 km deep · 2 km away
4. 1.71 km ENE of Alamo, CaliforniaSat, Apr 28, 1:31 AM PDT · 13307 days ago · 6 km deep · 4 km away
5. 1.71 km ENE of Alamo, CaliforniaSat, Apr 28, 1:38 AM PDT · 13307 days ago · 6 km deep · 4 km away
6. 2.43 km ENE of Alamo, CaliforniaSat, Apr 28, 2:16 AM PDT · 13307 days ago · 6 km deep · 2 km away
7. 1.61 km NE of Alamo, CaliforniaSat, Apr 28, 2:20 AM PDT · 13307 days ago · 5 km deep · 5 km away
8. 2.72 km ENE of Alamo, CaliforniaSat, Apr 28, 2:23 AM PDT · 13307 days ago · 5 km deep · 4 km away
9. 2.45 km N of Interlaken, CaliforniaSat, Apr 28, 2:28 AM PDT · 13307 days ago · 9 km deep · 99 km away
10. 1.61 km ENE of Alamo, CaliforniaSat, Apr 28, 3:23 AM PDT · 13307 days ago · 5 km deep · 4 km away
11. 1.71 km ENE of Alamo, CaliforniaSat, Apr 28, 3:29 AM PDT · 13307 days ago · 6 km deep · 4 km away
12. 2.83 km ENE of Alamo, CaliforniaSat, Apr 28, 4:22 AM PDT · 13307 days ago · 5 km deep · 2 km away
13. 1.93 km ENE of Alamo, CaliforniaSat, Apr 28, 4:53 AM PDT · 13307 days ago · 5 km deep · 3 km away
14. 1.83 km NNW of Diablo, CaliforniaSat, Apr 28, 5:28 AM PDT · 13307 days ago · 1 km deep · 0 km away
15. 1.84 km SSE of North Gate, CaliforniaSat, Apr 28, 5:42 AM PDT · 13307 days ago · 7 km deep · 1 km away
16. 1.71 km ENE of Alamo, CaliforniaSat, Apr 28, 6:30 AM PDT · 13307 days ago · 5 km deep · 4 km away
17. 1.61 km ENE of Alamo, CaliforniaSat, Apr 28, 6:31 AM PDT · 13307 days ago · 6 km deep · 4 km away
18. 1.51 km ENE of Alamo, CaliforniaSat, Apr 28, 6:59 AM PDT · 13307 days ago · 5 km deep · 4 km away
19. 1.73 km ENE of Alamo, CaliforniaSat, Apr 28, 7:26 AM PDT · 13307 days ago · 3 km deep · 2 km away
20. 2.51 km NE of Alamo, CaliforniaSat, Apr 28, 8:08 AM PDT · 13307 days ago · 7 km deep · 4 km away
21. 1.56 km N of Interlaken, CaliforniaSat, Apr 28, 8:22 AM PDT · 13307 days ago · 8 km deep · 98 km away
22. 1.81 km ENE of Alamo, CaliforniaSat, Apr 28, 9:04 AM PDT · 13307 days ago · 6 km deep · 5 km away
23. 2.51 km ENE of Alamo, CaliforniaSat, Apr 28, 9:30 AM PDT · 13307 days ago · 5 km deep · 4 km away
24. 1.60 km NE of Alamo, CaliforniaSat, Apr 28, 9:48 AM PDT · 13307 days ago · 5 km deep · 5 km away
25. 2.00 km ENE of Alamo, CaliforniaSat, Apr 28, 9:51 AM PDT · 13307 days ago · 5 km deep · 5 km away
26. 2.51 km NE of Alamo, CaliforniaSat, Apr 28, 10:17 AM PDT · 13307 days ago · 5 km deep · 5 km away
27. 2.92 km ENE of Alamo, CaliforniaSat, Apr 28, 11:17 AM PDT · 13307 days ago · 6 km deep · 3 km away
28. 2.52 km ENE of Alamo, CaliforniaSat, Apr 28, 11:19 AM PDT · 13307 days ago · 6 km deep · 3 km away
29. 1.51 km ENE of Alamo, CaliforniaSat, Apr 28, 1:18 PM PDT · 13307 days ago · 6 km deep · 4 km away
30. 1.93 km ENE of Alamo, CaliforniaSat, Apr 28, 3:20 PM PDT · 13307 days ago · 5 km deep · 2 km away
31. 2.01 km ENE of Alamo, CaliforniaSat, Apr 28, 5:03 PM PDT · 13307 days ago · 6 km deep · 5 km away
32. 2.43 km ENE of Alamo, CaliforniaSat, Apr 28, 6:31 PM PDT · 13307 days ago · 5 km deep · 3 km away
33. 2.03 km NNW of Diablo, CaliforniaSat, Apr 28, 7:41 PM PDT · 13307 days ago · 6 km deep · 1 km away
34. 1.70 km NE of Alamo, CaliforniaSat, Apr 28, 7:45 PM PDT · 13307 days ago · 5 km deep · 5 km away
35. 2.10 km ENE of Alamo, CaliforniaSat, Apr 28, 7:47 PM PDT · 13307 days ago · 5 km deep · 5 km away
36. 1.61 km ENE of Alamo, CaliforniaSat, Apr 28, 9:58 PM PDT · 13306 days ago · 2 km deep · 4 km away
37. 1.91 km ENE of Alamo, CaliforniaSat, Apr 28, 10:03 PM PDT · 13306 days ago · 6 km deep · 4 km away
38. 1.81 km ENE of Alamo, CaliforniaSat, Apr 28, 11:19 PM PDT · 13306 days ago · 6 km deep · 4 km away
39. 2.23 km ENE of Alamo, CaliforniaSun, Apr 29, 3:01 AM PDT · 13306 days ago · 6 km deep · 2 km away
40. 2.12 km WNW of Diablo, CaliforniaSun, Apr 29, 3:19 AM PDT · 13306 days ago · 7 km deep · 4 km away
41. 1.95 km S of Moskowite Corner, CaliforniaSun, Apr 29, 3:29 AM PDT · 13306 days ago · 6 km deep · 61 km away
42. 1.51 km ENE of Alamo, CaliforniaSun, Apr 29, 4:31 AM PDT · 13306 days ago · 6 km deep · 5 km away
43. 1.72 km ENE of Alamo, CaliforniaSun, Apr 29, 6:10 AM PDT · 13306 days ago · 5 km deep · 4 km away
44. 1.83 km NNW of Diablo, CaliforniaSun, Apr 29, 7:37 AM PDT · 13306 days ago · 1 km deep · 1 km away
45. 2.52 km ENE of Alamo, CaliforniaSun, Apr 29, 7:59 AM PDT · 13306 days ago · 8 km deep · 3 km away
46. 1.64 km NNW of Diablo, CaliforniaSun, Apr 29, 11:10 AM PDT · 13306 days ago · 4 km deep · 0 km away
47. 2.73 km ENE of Alamo, CaliforniaSun, Apr 29, 12:20 PM PDT · 13306 days ago · 6 km deep · 2 km away
48. 1.71 km ENE of Alamo, CaliforniaSun, Apr 29, 12:53 PM PDT · 13306 days ago · 6 km deep · 4 km away
49. 1.92 km ESE of Danville, CaliforniaSun, Apr 29, 6:23 PM PDT · 13306 days ago · 7 km deep · 6 km away
50. 1.62 km SSW of Diablo, CaliforniaSun, Apr 29, 6:26 PM PDT · 13306 days ago · 3 km deep · 6 km away
51. 2.33 km ENE of Alamo, CaliforniaSun, Apr 29, 6:54 PM PDT · 13306 days ago · 4 km deep · 3 km away
52. 1.63 km ENE of Alamo, CaliforniaSun, Apr 29, 7:00 PM PDT · 13306 days ago · 3 km deep · 2 km away
53. 1.73 km ENE of Alamo, CaliforniaSun, Apr 29, 7:09 PM PDT · 13306 days ago · 6 km deep · 3 km away
54. 1.94 km N of Diablo, CaliforniaSun, Apr 29, 8:48 PM PDT · 13305 days ago · 3 km deep · 1 km away
55. 1.62 km ESE of Danville, CaliforniaSun, Apr 29, 10:37 PM PDT · 13305 days ago · 6 km deep · 6 km away
56. 1.61 km ENE of Alamo, CaliforniaMon, Apr 30, 1:45 AM PDT · 13305 days ago · 6 km deep · 5 km away
57. 1.61 km ENE of Alamo, CaliforniaMon, Apr 30, 3:15 AM PDT · 13305 days ago · 5 km deep · 4 km away
58. 1.62 km ESE of Danville, CaliforniaMon, Apr 30, 4:13 AM PDT · 13305 days ago · 6 km deep · 6 km away
59. 1.91 km ESE of Danville, CaliforniaMon, Apr 30, 4:13 AM PDT · 13305 days ago · 6 km deep · 6 km away
60. 2.02 km ESE of Danville, CaliforniaMon, Apr 30, 4:14 AM PDT · 13305 days ago · 7 km deep · 6 km away

The first 60 of 187.

Before

1. 2.63 km SSE of North Gate, CaliforniaSat, Apr 28, 12:33 AM PDT · 13307 days ago · 6 km deep · 1 km away
2. 1.71 km E of Alamo, CaliforniaSat, Apr 28, 12:28 AM PDT · 13307 days ago · 5 km deep · 5 km away
3. 1.94 km NNW of Diablo, CaliforniaSat, Apr 28, 12:18 AM PDT · 13307 days ago · 5 km deep · 1 km away
4. 1.51 km ENE of Alamo, CaliforniaSat, Apr 28, 12:08 AM PDT · 13307 days ago · 6 km deep · 4 km away
5. 1.63 km ENE of Alamo, CaliforniaSat, Apr 28, 12:07 AM PDT · 13307 days ago · 3 km deep · 3 km away
6. 1.93 km ENE of Alamo, CaliforniaFri, Apr 27, 11:54 PM PDT · 13307 days ago · 6 km deep · 2 km away
7. 1.71 km ENE of Alamo, CaliforniaFri, Apr 27, 11:49 PM PDT · 13307 days ago · 5 km deep · 4 km away
8. 2.40 km E of Alamo, CaliforniaFri, Apr 27, 11:16 PM PDT · 13307 days ago · 6 km deep · 5 km away
9. 1.92 km ENE of Alamo, CaliforniaFri, Apr 27, 11:00 PM PDT · 13307 days ago · 4 km deep · 4 km away
10. 1.82 km ENE of Alamo, CaliforniaFri, Apr 27, 10:57 PM PDT · 13307 days ago · 4 km deep · 4 km away
11. 2.81 km ENE of Alamo, CaliforniaFri, Apr 27, 10:55 PM PDT · 13307 days ago · 7 km deep · 4 km away
12. 1.61 km ENE of Alamo, CaliforniaFri, Apr 27, 10:48 PM PDT · 13307 days ago · 6 km deep · 5 km away
13. 3.41 km NE of Alamo, CaliforniaFri, Apr 27, 10:45 PM PDT · 13307 days ago · 8 km deep · 4 km away
14. 1.62 km NE of Alamo, CaliforniaFri, Apr 27, 10:40 PM PDT · 13307 days ago · 7 km deep · 3 km away
15. 1.72 km ENE of Alamo, CaliforniaFri, Apr 27, 10:40 PM PDT · 13307 days ago · 6 km deep · 3 km away
16. 1.91 km ENE of Alamo, CaliforniaFri, Apr 27, 10:37 PM PDT · 13307 days ago · 6 km deep · 4 km away
17. 1.91 km ENE of Alamo, CaliforniaFri, Apr 27, 10:27 PM PDT · 13307 days ago · 6 km deep · 5 km away
18. 1.61 km ENE of Alamo, CaliforniaFri, Apr 27, 10:12 PM PDT · 13307 days ago · 6 km deep · 4 km away
19. 2.28 km N of Bay Point, CaliforniaFri, Apr 27, 10:08 PM PDT · 13307 days ago · 9 km deep · 26 km away
20. 1.83 km NW of Diablo, CaliforniaFri, Apr 27, 10:06 PM PDT · 13307 days ago · 3 km deep · 2 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc156721. Read Sat, Oct 3, 2026, 3:08 PM UTC.