M1.8 earthquake 12 km N of Morgan Hill, California

Magnitude

1.8 (md), micro

Local time

Thu, Dec 17, 1987, 1:05 AM PST

UTC

1987-12-17 09:05:49 UTC

Depth

6.4 km (4.0 mi), shallow

Epicenter

37.243° N, 121.628° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.1 km horizontally, 0.4 km in depth

Magnitude uncertainty

±0.17

Depth from

From location

Station coverage gap

60°

Stations used

44

• Morgan Hill, CaliforniaPopulation 42,948. Forecast13 kmN
• San Jose, CaliforniaPopulation 997,368. Forecast26 kmESE
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast468 kmNW

After

1. 1.96 km NW of Broadmoor, CaliforniaThu, Dec 17, 9:55 AM PST · 14159 days ago · 21 km deep · 96 km away
2. 1.66 km NE of Ridgemark, CaliforniaThu, Dec 17, 6:53 PM PST · 14159 days ago · 5 km deep · 52 km away
3. 2.411 km SSE of Livermore, CaliforniaThu, Dec 17, 11:47 PM PST · 14158 days ago · 5 km deep · 40 km away
4. 2.6Northern CaliforniaFri, Dec 18, 9:48 AM PST · 14158 days ago · 5 km deep · 40 km away
5. 3.09 km SW of Tres Pinos, CAFri, Dec 18, 11:32 AM PST · 14158 days ago · 2 km deep · 61 km away
6. 1.72 km ESE of East Richmond Heights, CaliforniaFri, Dec 18, 1:13 PM PST · 14158 days ago · 8 km deep · 97 km away
7. 1.824 km ENE of Soledad, CaliforniaSat, Dec 19, 3:31 PM PST · 14157 days ago · 2 km deep · 96 km away
8. 1.5Central CaliforniaSat, Dec 19, 10:19 PM PST · 14156 days ago · 5 km deep · 50 km away
9. 2.10 km NNE of Ladera, CaliforniaMon, Dec 21, 4:20 PM PST · 14155 days ago · 5 km deep · 53 km away
10. 2.029 km SSW of South Dos Palos, CaliforniaTue, Dec 22, 5:09 AM PST · 14154 days ago · 0 km deep · 98 km away
11. 3.828 km SSW of South Dos Palos, CaliforniaTue, Dec 22, 6:36 AM PST · 14154 days ago · 3 km deep · 98 km away
12. 2.631 km SSW of South Dos Palos, CaliforniaTue, Dec 22, 6:47 AM PST · 14154 days ago · 1 km deep · 98 km away
13. 2.329 km SSW of South Dos Palos, CaliforniaTue, Dec 22, 6:49 AM PST · 14154 days ago · -1 km deep · 98 km away
14. 2.032 km SSW of South Dos Palos, CaliforniaTue, Dec 22, 6:50 AM PST · 14154 days ago · 1 km deep · 97 km away
15. 2.930 km SSW of South Dos Palos, CaliforniaTue, Dec 22, 6:50 AM PST · 14154 days ago · 2 km deep · 98 km away
16. 1.829 km SSW of South Dos Palos, CaliforniaTue, Dec 22, 7:55 AM PST · 14154 days ago · -1 km deep · 97 km away
17. 2.0Central CaliforniaTue, Dec 22, 8:05 AM PST · 14154 days ago · -1 km deep · 95 km away
18. 1.5Central CaliforniaTue, Dec 22, 8:06 AM PST · 14154 days ago · -1 km deep · 97 km away
19. 2.429 km SSW of South Dos Palos, CaliforniaTue, Dec 22, 8:08 AM PST · 14154 days ago · -1 km deep · 97 km away
20. 1.8Northern CaliforniaTue, Dec 22, 9:56 AM PST · 14154 days ago · 7 km deep · 48 km away
21. 2.229 km SSW of South Dos Palos, CaliforniaWed, Dec 23, 9:33 AM PST · 14153 days ago · -1 km deep · 98 km away
22. 1.513 km ENE of East Foothills, CaliforniaWed, Dec 23, 12:00 PM PST · 14153 days ago · 6 km deep · 22 km away
23. 1.55 km S of Ridgemark, CaliforniaThu, Dec 24, 8:32 AM PST · 14152 days ago · 8 km deep · 58 km away
24. 2.12 km SSW of Portola Valley, CaliforniaFri, Dec 25, 7:46 AM PST · 14151 days ago · 9 km deep · 56 km away
25. 2.120 km SSE of Tres Pinos, CaliforniaFri, Dec 25, 10:19 AM PST · 14151 days ago · 5 km deep · 78 km away
26. 1.713 km ESE of East Foothills, CaliforniaFri, Dec 25, 10:46 AM PST · 14151 days ago · 8 km deep · 10 km away
27. 1.69 km NE of Morgan Hill, CaliforniaFri, Dec 25, 6:18 PM PST · 14151 days ago · 5 km deep · 7 km away
28. 2.029 km SSW of South Dos Palos, CaliforniaSat, Dec 26, 5:07 AM PST · 14150 days ago · 3 km deep · 99 km away
29. 2.031 km SSW of South Dos Palos, CaliforniaSat, Dec 26, 9:15 AM PST · 14150 days ago · 3 km deep · 99 km away
30. 2.428 km SSW of South Dos Palos, CaliforniaSat, Dec 26, 3:42 PM PST · 14150 days ago · -1 km deep · 98 km away
31. 2.829 km SSW of South Dos Palos, CaliforniaSat, Dec 26, 3:53 PM PST · 14150 days ago · 0 km deep · 98 km away
32. 1.829 km SSW of South Dos Palos, CaliforniaSat, Dec 26, 6:06 PM PST · 14150 days ago · 0 km deep · 98 km away
33. 2.021 km NE of Soledad, CaliforniaSat, Dec 26, 10:30 PM PST · 14149 days ago · 7 km deep · 88 km away
34. 2.120 km SSE of Tres Pinos, CaliforniaSun, Dec 27, 1:05 AM PST · 14149 days ago · 5 km deep · 78 km away
35. 1.96 km SW of Spreckels, CaliforniaSun, Dec 27, 10:33 AM PST · 14149 days ago · 11 km deep · 74 km away
36. 1.917 km SSE of Livermore, CaliforniaSun, Dec 27, 7:57 PM PST · 14149 days ago · 5 km deep · 34 km away
37. 1.921 km NNE of Soledad, CaliforniaSun, Dec 27, 11:23 PM PST · 14148 days ago · 8 km deep · 82 km away
38. 1.726 km NE of Soledad, CaliforniaMon, Dec 28, 4:09 PM PST · 14148 days ago · 10 km deep · 88 km away
39. 1.626 km NE of Soledad, CaliforniaMon, Dec 28, 4:10 PM PST · 14148 days ago · 10 km deep · 88 km away
40. 1.626 km NE of Soledad, CaliforniaMon, Dec 28, 4:25 PM PST · 14148 days ago · 10 km deep · 88 km away
41. 2.332 km SSW of South Dos Palos, CaliforniaTue, Dec 29, 12:58 PM PST · 14147 days ago · 1 km deep · 99 km away
42. 3.611 km SW of Byron, CaliforniaTue, Dec 29, 10:43 PM PST · 14146 days ago · 12 km deep · 64 km away
43. 1.713 km SSE of Tres Pinos, CaliforniaWed, Dec 30, 6:43 AM PST · 14146 days ago · 4 km deep · 70 km away
44. 2.2Central CaliforniaThu, Dec 31, 1:51 AM PST · 14145 days ago · -1 km deep · 99 km away
45. 1.816 km NE of East Foothills, CaliforniaThu, Dec 31, 2:07 AM PST · 14145 days ago · 2 km deep · 27 km away
46. 1.99 km S of San Juan Bautista, CaliforniaThu, Dec 31, 8:55 AM PST · 14145 days ago · 8 km deep · 54 km away
47. 1.528 km SSW of South Dos Palos, CaliforniaThu, Dec 31, 2:45 PM PST · 14145 days ago · 0 km deep · 99 km away
48. 1.514 km SSE of Livermore, CaliforniaFri, Jan 1, 6:12 AM PST · 14144 days ago · 7 km deep · 36 km away
49. 3.58 km ENE of San Martin, CaliforniaFri, Jan 1, 7:15 PM PST · 14144 days ago · 8 km deep · 17 km away
50. 1.68 km ENE of San Martin, CaliforniaFri, Jan 1, 7:24 PM PST · 14144 days ago · 7 km deep · 17 km away
51. 2.921 km NE of Soledad, CaliforniaSat, Jan 2, 1:13 AM PST · 14143 days ago · 6 km deep · 90 km away
52. 2.121 km NE of Soledad, CaliforniaSat, Jan 2, 1:15 AM PST · 14143 days ago · 5 km deep · 89 km away
53. 1.821 km NE of Soledad, CaliforniaSat, Jan 2, 1:24 AM PST · 14143 days ago · 5 km deep · 90 km away
54. 1.86 km SW of Gilroy, CaliforniaSat, Jan 2, 7:49 AM PST · 14143 days ago · 7 km deep · 31 km away
55. 1.817 km SSE of Tres Pinos, CaliforniaSun, Jan 3, 8:18 AM PST · 14142 days ago · 5 km deep · 75 km away
56. 1.71 km NW of Danville, CaliforniaSun, Jan 3, 3:08 PM PST · 14142 days ago · 7 km deep · 73 km away
57. 1.92 km WNW of Dublin, CaliforniaSun, Jan 3, 4:49 PM PST · 14142 days ago · 9 km deep · 60 km away
58. 2.214 km SSE of Livermore, CaliforniaMon, Jan 4, 4:00 PM PST · 14141 days ago · 7 km deep · 37 km away
59. 1.628 km SSW of South Dos Palos, CaliforniaTue, Jan 5, 2:37 AM PST · 14140 days ago · 0 km deep · 98 km away
60. 1.6Central CaliforniaTue, Jan 5, 3:08 AM PST · 14140 days ago · 6 km deep · 32 km away

The first 60 of 157.

Before

1. 1.940 km ENE of Soledad, CaliforniaTue, Dec 15, 4:03 AM PST · 14161 days ago · 5 km deep · 98 km away
2. 1.75 km NNE of Tres Pinos, CaliforniaMon, Dec 14, 8:26 PM PST · 14162 days ago · 6 km deep · 53 km away
3. 1.718 km SSE of Livermore, CaliforniaSun, Dec 13, 6:50 AM PST · 14163 days ago · 6 km deep · 32 km away
4. 1.74 km WSW of Cupertino, CaliforniaSat, Dec 12, 9:09 PM PST · 14164 days ago · 8 km deep · 40 km away
5. 1.815 km SSE of Livermore, CaliforniaSat, Dec 12, 8:28 PM PST · 14164 days ago · 6 km deep · 36 km away
6. 1.98 km ESE of East Foothills, CaliforniaSat, Dec 12, 6:05 PM PST · 14164 days ago · 8 km deep · 15 km away
7. 1.513 km N of Morgan Hill, CaliforniaSat, Dec 12, 8:16 AM PST · 14164 days ago · 5 km deep · 2 km away
8. 1.823 km SSW of Los Banos, CaliforniaThu, Dec 10, 8:19 AM PST · 14166 days ago · 0 km deep · 74 km away
9. 1.61 km NW of Brisbane, CaliforniaWed, Dec 9, 11:09 AM PST · 14167 days ago · 5 km deep · 85 km away
10. 2.812 km N of Morgan Hill, CATue, Dec 8, 8:31 PM PST · 14168 days ago · 5 km deep · 0 km away
11. 1.621 km SSE of Tres Pinos, CaliforniaMon, Dec 7, 2:52 AM PST · 14169 days ago · 4 km deep · 79 km away
12. 1.914 km N of Morgan Hill, CaliforniaSun, Dec 6, 6:58 PM PST · 14170 days ago · 6 km deep · 2 km away
13. 1.9Central CaliforniaSun, Dec 6, 6:48 PM PST · 14170 days ago · 6 km deep · 38 km away
14. 2.213 km N of Morgan Hill, CaliforniaSun, Dec 6, 8:58 AM PST · 14170 days ago · 3 km deep · 2 km away
15. 1.613 km NE of East Foothills, CaliforniaSun, Dec 6, 6:11 AM PST · 14170 days ago · 8 km deep · 27 km away
16. 1.66 km E of Tres Pinos, CaliforniaThu, Dec 3, 10:34 PM PST · 14172 days ago · 7 km deep · 61 km away
17. 1.915 km N of Morgan Hill, CaliforniaWed, Dec 2, 10:03 PM PST · 14173 days ago · 6 km deep · 3 km away
18. 1.912 km NE of East Foothills, CaliforniaWed, Dec 2, 9:55 PM PST · 14173 days ago · 7 km deep · 27 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc110021. Read Tue, Sep 22, 2026, 4:51 PM UTC.