M1.8 earthquake 5 km SSW of Ridgemark, California

Magnitude

1.8 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Fri, Jun 1, 1990, 12:45 PM PDT

UTC

1990-06-01 19:45:54 UTC

Depth

4.6 km (2.9 mi), shallow

Epicenter

36.770° N, 121.386° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.1 km horizontally, 0.3 km in depth

Magnitude uncertainty

±0.18

Depth from

From location

Station coverage gap

37°

Stations used

38

• Ridgemark, CaliforniaPopulation 3,016. Forecast5 kmSSW
• Hollister, CaliforniaPopulation 37,462. Forecast9 kmS
• Salinas, CaliforniaPopulation 157,380. Forecast26 kmENE
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast415 kmNW

After

1. 1.65 km WNW of San Juan Bautista, CaliforniaFri, Jun 1, 5:48 PM PDT · 13274 days ago · 5 km deep · 21 km away
2. 2.222 km NNE of Soledad, CaliforniaFri, Jun 1, 6:28 PM PDT · 13273 days ago · 8 km deep · 24 km away
3. 3.03 km W of San Juan Bautista, CaliforniaFri, Jun 1, 7:43 PM PDT · 13273 days ago · 6 km deep · 19 km away
4. 2.53 km W of San Juan Bautista, CaliforniaFri, Jun 1, 8:45 PM PDT · 13273 days ago · 6 km deep · 19 km away
5. 1.83 km W of San Juan Bautista, CaliforniaFri, Jun 1, 9:07 PM PDT · 13273 days ago · 6 km deep · 19 km away
6. 1.73 km W of San Juan Bautista, CaliforniaFri, Jun 1, 9:55 PM PDT · 13273 days ago · 6 km deep · 19 km away
7. 1.93 km W of San Juan Bautista, CaliforniaFri, Jun 1, 9:56 PM PDT · 13273 days ago · 6 km deep · 19 km away
8. 2.324 km NE of Greenfield, CaliforniaFri, Jun 1, 11:11 PM PDT · 13273 days ago · 5 km deep · 45 km away
9. 2.83 km W of San Juan Bautista, CaliforniaSat, Jun 2, 9:17 AM PDT · 13273 days ago · 6 km deep · 19 km away
10. 2.13 km W of San Juan Bautista, CaliforniaSat, Jun 2, 1:09 PM PDT · 13273 days ago · 6 km deep · 19 km away
11. 2.63 km NNW of Aromas, CaliforniaSat, Jun 2, 5:11 PM PDT · 13273 days ago · 10 km deep · 30 km away
12. 1.917 km NE of East Foothills, CaliforniaSat, Jun 2, 11:51 PM PDT · 13272 days ago · 7 km deep · 86 km away
13. 3.22 km ESE of Aromas, CaliforniaSun, Jun 3, 5:49 AM PDT · 13272 days ago · 7 km deep · 24 km away
14. 1.63 km W of San Juan Bautista, CaliforniaSun, Jun 3, 2:13 PM PDT · 13272 days ago · 6 km deep · 19 km away
15. 1.524 km NE of Greenfield, CaliforniaSun, Jun 3, 3:45 PM PDT · 13272 days ago · 5 km deep · 46 km away
16. 1.82 km E of Aromas, CaliforniaSun, Jun 3, 8:40 PM PDT · 13271 days ago · 4 km deep · 24 km away
17. 1.822 km NNE of Soledad, CaliforniaSun, Jun 3, 9:47 PM PDT · 13271 days ago · 2 km deep · 24 km away
18. 2.91 km ENE of Aromas, CaliforniaMon, Jun 4, 3:16 AM PDT · 13271 days ago · 6 km deep · 26 km away
19. 1.76 km ENE of Corralitos, CaliforniaTue, Jun 5, 5:20 AM PDT · 13270 days ago · 9 km deep · 42 km away
20. 2.113 km SSE of Tres Pinos, CaliforniaTue, Jun 5, 8:42 PM PDT · 13269 days ago · 4 km deep · 14 km away
21. 1.911 km S of Three Rocks, CaliforniaWed, Jun 6, 10:29 PM PDT · 13268 days ago · 8 km deep · 96 km away
22. 2.64 km ESE of Interlaken, CaliforniaThu, Jun 7, 9:43 AM PDT · 13268 days ago · 11 km deep · 32 km away
23. 1.93 km W of San Juan Bautista, CaliforniaFri, Jun 8, 1:56 AM PDT · 13267 days ago · 7 km deep · 19 km away
24. 1.6Central CaliforniaSun, Jun 10, 1:28 PM PDT · 13265 days ago · 8 km deep · 38 km away
25. 3.315 km E of Seven Trees, CaliforniaSun, Jun 10, 6:38 PM PDT · 13264 days ago · 6 km deep · 62 km away
26. 1.63 km ENE of Corralitos, CaliforniaSun, Jun 10, 8:34 PM PDT · 13264 days ago · 14 km deep · 43 km away
27. 1.51 km NNE of Interlaken, CaliforniaSun, Jun 10, 8:55 PM PDT · 13264 days ago · 13 km deep · 37 km away
28. 1.94 km W of San Juan Bautista, CaliforniaSun, Jun 10, 9:01 PM PDT · 13264 days ago · 8 km deep · 20 km away
29. 2.622 km ENE of Soledad, CaliforniaMon, Jun 11, 12:35 AM PDT · 13264 days ago · 8 km deep · 38 km away
30. 1.81 km NE of Aromas, CaliforniaMon, Jun 11, 10:10 AM PDT · 13264 days ago · 5 km deep · 26 km away
31. 1.512 km NNE of Morgan Hill, CaliforniaMon, Jun 11, 4:43 PM PDT · 13264 days ago · 4 km deep · 56 km away
32. 2.04 km WNW of Day Valley, CaliforniaTue, Jun 12, 8:05 AM PDT · 13263 days ago · 17 km deep · 56 km away
33. 1.97 km N of Day Valley, CaliforniaTue, Jun 12, 1:38 PM PDT · 13263 days ago · 5 km deep · 56 km away
34. 1.710 km WSW of Morgan Hill, CaliforniaWed, Jun 13, 3:29 PM PDT · 13262 days ago · 2 km deep · 50 km away
35. 2.39 km NNW of Big Sur, CaliforniaThu, Jun 14, 2:10 AM PDT · 13261 days ago · 12 km deep · 64 km away
36. 1.63 km E of Saratoga, CaliforniaThu, Jun 14, 5:00 AM PDT · 13261 days ago · 7 km deep · 77 km away
37. 1.823 km NE of San Ardo, CaliforniaThu, Jun 14, 6:34 AM PDT · 13261 days ago · 7 km deep · 85 km away
38. 1.924 km ENE of Soledad, CaliforniaThu, Jun 14, 2:08 PM PDT · 13261 days ago · 6 km deep · 38 km away
39. 2.621 km NE of Soledad, CaliforniaThu, Jun 14, 7:25 PM PDT · 13260 days ago · 2 km deep · 29 km away
40. 1.91 km SW of Saratoga, CaliforniaFri, Jun 15, 4:21 AM PDT · 13260 days ago · 6 km deep · 79 km away
41. 3.13 km NNW of Aromas, CaliforniaFri, Jun 15, 5:21 AM PDT · 13260 days ago · 9 km deep · 29 km away
42. 1.96 km S of Tres Pinos, CaliforniaFri, Jun 15, 11:20 AM PDT · 13260 days ago · 9 km deep · 8 km away
43. 1.78 km SSW of Tres Pinos, CaliforniaFri, Jun 15, 12:41 PM PDT · 13260 days ago · 3 km deep · 6 km away
44. 2.411 km SW of Ridgemark, CaliforniaFri, Jun 15, 1:25 PM PDT · 13260 days ago · 5 km deep · 8 km away
45. 3.010 km WSW of Ridgemark, CaliforniaFri, Jun 15, 1:37 PM PDT · 13260 days ago · 8 km deep · 7 km away
46. 1.610 km WSW of Ridgemark, CaliforniaFri, Jun 15, 4:18 PM PDT · 13260 days ago · 8 km deep · 7 km away
47. 1.68 km SSW of Tres Pinos, CaliforniaFri, Jun 15, 6:02 PM PDT · 13260 days ago · 3 km deep · 6 km away
48. 1.610 km SE of San Juan Bautista, CaliforniaFri, Jun 15, 6:03 PM PDT · 13260 days ago · 9 km deep · 8 km away
49. 2.29 km W of Three Rocks, CaliforniaFri, Jun 15, 9:28 PM PDT · 13259 days ago · 12 km deep · 85 km away
50. 1.617 km WSW of Davenport, CaliforniaSat, Jun 16, 3:02 AM PDT · 13259 days ago · 12 km deep · 91 km away
51. 1.523 km ENE of Soledad, CaliforniaSat, Jun 16, 7:43 AM PDT · 13259 days ago · 4 km deep · 40 km away
52. 1.65 km ESE of Interlaken, CaliforniaSat, Jun 16, 11:36 AM PDT · 13259 days ago · 7 km deep · 32 km away
53. 2.13 km WSW of San Juan Bautista, CaliforniaSat, Jun 16, 12:17 PM PDT · 13259 days ago · 7 km deep · 18 km away
54. 1.925 km ENE of Greenfield, CaliforniaSat, Jun 16, 10:47 PM PDT · 13258 days ago · 6 km deep · 51 km away
55. 2.13 km S of San Juan Bautista, CaliforniaSun, Jun 17, 2:04 AM PDT · 13258 days ago · 4 km deep · 14 km away
56. 2.62 km ESE of San Ardo, CaliforniaSun, Jun 17, 7:17 PM PDT · 13257 days ago · 10 km deep · 95 km away
57. 1.63 km NNW of Aromas, CaliforniaSun, Jun 17, 11:21 PM PDT · 13257 days ago · 8 km deep · 29 km away
58. 2.13 km SSW of Los Altos Hills, CaliforniaMon, Jun 18, 12:15 AM PDT · 13257 days ago · 7 km deep · 94 km away
59. 3.38 km SSW of Tres Pinos, CaliforniaMon, Jun 18, 7:53 AM PDT · 13257 days ago · 3 km deep · 5 km away
60. 1.623 km ENE of Soledad, CaliforniaMon, Jun 18, 11:45 AM PDT · 13257 days ago · 6 km deep · 42 km away

The first 60 of 176.

Before

1. 2.129 km SSW of South Dos Palos, CaliforniaThu, May 31, 8:06 PM PDT · 13274 days ago · 0 km deep · 53 km away
2. 1.529 km SSW of South Dos Palos, CaliforniaThu, May 31, 4:03 PM PDT · 13275 days ago · 5 km deep · 53 km away
3. 1.95 km NNW of Aromas, CaliforniaThu, May 31, 2:37 PM PDT · 13275 days ago · 10 km deep · 31 km away
4. 2.526 km WSW of Mendota, CaliforniaThu, May 31, 12:56 AM PDT · 13275 days ago · -1 km deep · 66 km away
5. 1.719 km SSE of Tres Pinos, CaliforniaWed, May 30, 4:48 AM PDT · 13276 days ago · 5 km deep · 20 km away
6. 2.89 km ESE of Livermore, CaliforniaTue, May 29, 8:56 PM PDT · 13276 days ago · 9 km deep · 100 km away
7. 2.22 km NNW of Seacliff, CaliforniaTue, May 29, 6:43 AM PDT · 13277 days ago · 5 km deep · 54 km away
8. 1.52 km W of San Juan Bautista, CaliforniaTue, May 29, 4:23 AM PDT · 13277 days ago · 6 km deep · 18 km away
9. 2.6Central CaliforniaTue, May 29, 4:18 AM PDT · 13277 days ago · 6 km deep · 18 km away
10. 1.82 km S of Lexington Hills, CaliforniaMon, May 28, 11:14 PM PDT · 13277 days ago · 13 km deep · 67 km away
11. 2.4Central CaliforniaMon, May 28, 9:54 PM PDT · 13277 days ago · 7 km deep · 6 km away
12. 2.44 km S of Lexington Hills, CaliforniaMon, May 28, 7:43 PM PDT · 13277 days ago · 14 km deep · 65 km away
13. 2.14 km WNW of Lexington Hills, CaliforniaMon, May 28, 11:39 AM PDT · 13278 days ago · 11 km deep · 72 km away
14. 1.62 km N of Interlaken, CaliforniaMon, May 28, 11:15 AM PDT · 13278 days ago · 12 km deep · 39 km away
15. 2.328 km WSW of Mendota, CaliforniaMon, May 28, 5:46 AM PDT · 13278 days ago · -1 km deep · 65 km away
16. 2.213 km WNW of Davenport, CaliforniaSun, May 27, 10:52 PM PDT · 13278 days ago · 3 km deep · 90 km away
17. 2.73 km W of San Juan Bautista, CaliforniaSun, May 27, 10:31 AM PDT · 13279 days ago · 6 km deep · 19 km away
18. 1.64 km S of Lexington Hills, CaliforniaSun, May 27, 3:26 AM PDT · 13279 days ago · 13 km deep · 65 km away
19. 1.918 km WSW of Three Rocks, CaliforniaSat, May 26, 9:25 PM PDT · 13279 days ago · 12 km deep · 79 km away
20. 1.65 km ESE of Interlaken, CaliforniaSat, May 26, 9:03 PM PDT · 13279 days ago · 11 km deep · 32 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc158663. Read Sun, Oct 4, 2026, 12:48 PM UTC.