M1.7 earthquake 4 km WSW of Cupertino, California

Magnitude

1.7 (md), micro

Local time

Sat, Dec 12, 1987, 9:09 PM PST

UTC

1987-12-13 05:09:31 UTC

Depth

7.7 km (4.8 mi), shallow

Epicenter

37.309° N, 122.076° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.3 km horizontally, 0.5 km in depth

Magnitude uncertainty

±0.14

Depth from

From location

Station coverage gap

37°

Stations used

18

• Cupertino, CaliforniaPopulation 60,572. Forecast4 kmWSW
• Sunnyvale, CaliforniaPopulation 155,805. Forecast7 kmSSW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast501 kmNW

After

1. 1.718 km SSE of Livermore, CaliforniaSun, Dec 13, 6:50 AM PST · 14163 days ago · 6 km deep · 43 km away
2. 1.75 km NNE of Tres Pinos, CaliforniaMon, Dec 14, 8:26 PM PST · 14162 days ago · 6 km deep · 86 km away
3. 1.812 km N of Morgan Hill, CaliforniaThu, Dec 17, 1:05 AM PST · 14160 days ago · 6 km deep · 40 km away
4. 1.96 km NW of Broadmoor, CaliforniaThu, Dec 17, 9:55 AM PST · 14159 days ago · 21 km deep · 61 km away
5. 1.66 km NE of Ridgemark, CaliforniaThu, Dec 17, 6:53 PM PST · 14159 days ago · 5 km deep · 85 km away
6. 2.411 km SSE of Livermore, CaliforniaThu, Dec 17, 11:47 PM PST · 14159 days ago · 5 km deep · 46 km away
7. 2.6Northern CaliforniaFri, Dec 18, 9:48 AM PST · 14158 days ago · 5 km deep · 46 km away
8. 3.09 km SW of Tres Pinos, CAFri, Dec 18, 11:32 AM PST · 14158 days ago · 2 km deep · 89 km away
9. 1.72 km ESE of East Richmond Heights, CaliforniaFri, Dec 18, 1:13 PM PST · 14158 days ago · 8 km deep · 73 km away
10. 1.5Central CaliforniaSat, Dec 19, 10:19 PM PST · 14157 days ago · 5 km deep · 83 km away
11. 2.10 km NNE of Ladera, CaliforniaMon, Dec 21, 4:20 PM PST · 14155 days ago · 5 km deep · 15 km away
12. 1.8Northern CaliforniaTue, Dec 22, 9:56 AM PST · 14154 days ago · 7 km deep · 31 km away
13. 1.513 km ENE of East Foothills, CaliforniaWed, Dec 23, 12:00 PM PST · 14153 days ago · 6 km deep · 37 km away
14. 1.55 km S of Ridgemark, CaliforniaThu, Dec 24, 8:32 AM PST · 14152 days ago · 8 km deep · 87 km away
15. 2.12 km SSW of Portola Valley, CaliforniaFri, Dec 25, 7:46 AM PST · 14151 days ago · 9 km deep · 16 km away
16. 1.713 km ESE of East Foothills, CaliforniaFri, Dec 25, 10:46 AM PST · 14151 days ago · 8 km deep · 34 km away
17. 1.69 km NE of Morgan Hill, CaliforniaFri, Dec 25, 6:18 PM PST · 14151 days ago · 5 km deep · 45 km away
18. 1.96 km SW of Spreckels, CaliforniaSun, Dec 27, 10:33 AM PST · 14149 days ago · 11 km deep · 88 km away
19. 1.917 km SSE of Livermore, CaliforniaSun, Dec 27, 7:57 PM PST · 14149 days ago · 5 km deep · 44 km away
20. 3.29 km S of Muir Beach, CaliforniaTue, Dec 29, 5:09 PM PST · 14147 days ago · 10 km deep · 69 km away
21. 3.611 km SW of Byron, CaliforniaTue, Dec 29, 10:43 PM PST · 14147 days ago · 12 km deep · 63 km away
22. 1.713 km SSE of Tres Pinos, CaliforniaWed, Dec 30, 6:43 AM PST · 14146 days ago · 4 km deep · 100 km away
23. 1.816 km NE of East Foothills, CaliforniaThu, Dec 31, 2:07 AM PST · 14146 days ago · 2 km deep · 40 km away
24. 1.99 km S of San Juan Bautista, CaliforniaThu, Dec 31, 8:55 AM PST · 14145 days ago · 8 km deep · 77 km away
25. 1.514 km SSE of Livermore, CaliforniaFri, Jan 1, 6:12 AM PST · 14144 days ago · 7 km deep · 45 km away
26. 3.58 km ENE of San Martin, CaliforniaFri, Jan 1, 7:15 PM PST · 14144 days ago · 8 km deep · 54 km away
27. 1.68 km ENE of San Martin, CaliforniaFri, Jan 1, 7:24 PM PST · 14144 days ago · 7 km deep · 53 km away
28. 1.86 km SW of Gilroy, CaliforniaSat, Jan 2, 7:49 AM PST · 14143 days ago · 7 km deep · 55 km away
29. 1.71 km NW of Danville, CaliforniaSun, Jan 3, 3:08 PM PST · 14142 days ago · 7 km deep · 58 km away
30. 1.92 km WNW of Dublin, CaliforniaSun, Jan 3, 4:49 PM PST · 14142 days ago · 9 km deep · 46 km away
31. 2.214 km SSE of Livermore, CaliforniaMon, Jan 4, 4:00 PM PST · 14141 days ago · 7 km deep · 46 km away
32. 1.6Central CaliforniaTue, Jan 5, 3:08 AM PST · 14140 days ago · 6 km deep · 58 km away
33. 1.78 km SSW of Tres Pinos, CaliforniaTue, Jan 5, 7:04 PM PST · 14140 days ago · 3 km deep · 91 km away
34. 1.56 km E of East Foothills, CaliforniaWed, Jan 6, 5:31 AM PST · 14139 days ago · 3 km deep · 30 km away
35. 1.6Northern CaliforniaWed, Jan 6, 11:39 AM PST · 14139 days ago · 6 km deep · 41 km away
36. 1.711 km ESE of East Foothills, CaliforniaThu, Jan 7, 1:27 PM PST · 14138 days ago · 7 km deep · 33 km away
37. 1.74 km ENE of Tres Pinos, CaliforniaFri, Jan 8, 11:19 PM PST · 14137 days ago · 9 km deep · 90 km away
38. 1.86 km ENE of Hollister, CaliforniaSun, Jan 10, 9:13 AM PST · 14135 days ago · 7 km deep · 81 km away
39. 2.818 km SSE of Livermore, CaliforniaSun, Jan 10, 9:26 AM PST · 14135 days ago · 6 km deep · 43 km away
40. 2.31 km E of Walnut Creek, CaliforniaSun, Jan 10, 9:59 AM PST · 14135 days ago · 6 km deep · 66 km away
41. 2.418 km SSE of Livermore, CaliforniaMon, Jan 11, 12:08 AM PST · 14135 days ago · 6 km deep · 42 km away
42. 1.71 km E of Ladera, CaliforniaMon, Jan 11, 9:09 AM PST · 14134 days ago · 4 km deep · 14 km away
43. 1.50 km ENE of Benicia, CaliforniaWed, Jan 13, 12:18 AM PST · 14133 days ago · 8 km deep · 83 km away
44. 2.13 km WSW of Antioch, CaliforniaThu, Jan 14, 1:44 AM PST · 14132 days ago · 1 km deep · 79 km away
45. 3.03 km SW of Ridgemark, CAThu, Jan 14, 2:10 PM PST · 14131 days ago · 3 km deep · 84 km away
46. 2.42 km SW of Ridgemark, CaliforniaThu, Jan 14, 2:19 PM PST · 14131 days ago · 3 km deep · 84 km away
47. 3.0Central CaliforniaThu, Jan 14, 5:09 PM PST · 14131 days ago · 3 km deep · 84 km away
48. 3.217 km SW of Volta, CaliforniaFri, Jan 15, 8:15 AM PST · 14130 days ago · 2 km deep · 97 km away
49. 2.818 km SSE of Livermore, CaliforniaSat, Jan 16, 5:43 PM PST · 14129 days ago · 7 km deep · 42 km away
50. 1.93 km N of San Leandro, CaliforniaSun, Jan 17, 2:30 PM PST · 14128 days ago · 3 km deep · 50 km away
51. 1.57 km NNE of Milpitas, CaliforniaMon, Jan 18, 2:46 PM PST · 14127 days ago · 3 km deep · 27 km away
52. 1.719 km NE of East Foothills, CaliforniaMon, Jan 18, 10:13 PM PST · 14127 days ago · 6 km deep · 42 km away
53. 2.66 km ENE of Hollister, CaliforniaTue, Jan 19, 4:20 AM PST · 14126 days ago · 8 km deep · 81 km away
54. 3.017 km SW of Volta, CaliforniaThu, Jan 21, 8:02 AM PST · 14124 days ago · 2 km deep · 97 km away
55. 2.819 km SSE of Livermore, CaliforniaThu, Jan 21, 8:12 AM PST · 14124 days ago · 3 km deep · 43 km away
56. 1.7Northern CaliforniaSat, Jan 23, 5:00 AM PST · 14122 days ago · 13 km deep · 68 km away
57. 1.811 km E of Blackhawk, CaliforniaSat, Jan 23, 7:23 PM PST · 14122 days ago · 5 km deep · 62 km away
58. 1.712 km ESE of East Foothills, CaliforniaSun, Jan 24, 9:36 AM PST · 14121 days ago · 7 km deep · 34 km away
59. 2.49 km SW of Brentwood, CaliforniaSun, Jan 24, 10:22 PM PST · 14121 days ago · 16 km deep · 67 km away
60. 1.719 km SSE of Livermore, CaliforniaMon, Jan 25, 12:24 AM PST · 14121 days ago · 7 km deep · 43 km away

The first 60 of 92.

Before

1. 1.815 km SSE of Livermore, CaliforniaSat, Dec 12, 8:28 PM PST · 14164 days ago · 6 km deep · 45 km away
2. 1.98 km ESE of East Foothills, CaliforniaSat, Dec 12, 6:05 PM PST · 14164 days ago · 8 km deep · 32 km away
3. 1.513 km N of Morgan Hill, CaliforniaSat, Dec 12, 8:16 AM PST · 14164 days ago · 5 km deep · 39 km away
4. 1.61 km NW of Brisbane, CaliforniaWed, Dec 9, 11:09 AM PST · 14167 days ago · 5 km deep · 51 km away
5. 2.812 km N of Morgan Hill, CATue, Dec 8, 8:31 PM PST · 14168 days ago · 5 km deep · 40 km away
6. 1.914 km N of Morgan Hill, CaliforniaSun, Dec 6, 6:58 PM PST · 14170 days ago · 6 km deep · 39 km away
7. 1.9Central CaliforniaSun, Dec 6, 6:48 PM PST · 14170 days ago · 6 km deep · 73 km away
8. 2.213 km N of Morgan Hill, CaliforniaSun, Dec 6, 8:58 AM PST · 14170 days ago · 3 km deep · 39 km away
9. 1.613 km NE of East Foothills, CaliforniaSun, Dec 6, 6:11 AM PST · 14170 days ago · 8 km deep · 36 km away
10. 1.66 km E of Tres Pinos, CaliforniaThu, Dec 3, 10:34 PM PST · 14173 days ago · 7 km deep · 93 km away
11. 1.915 km N of Morgan Hill, CaliforniaWed, Dec 2, 10:03 PM PST · 14174 days ago · 6 km deep · 38 km away
12. 1.912 km NE of East Foothills, CaliforniaWed, Dec 2, 9:55 PM PST · 14174 days ago · 7 km deep · 35 km away
13. 1.610 km E of East Foothills, CaliforniaWed, Dec 2, 9:11 PM PST · 14174 days ago · 3 km deep · 34 km away
14. 3.78 km ENE of Gilroy, CaliforniaWed, Dec 2, 3:14 AM PST · 14174 days ago · 8 km deep · 62 km away
15. 1.75 km ENE of Fremont, CaliforniaTue, Dec 1, 8:21 PM PST · 14175 days ago · 11 km deep · 30 km away
16. 3.318 km SSE of Livermore, CaliforniaMon, Nov 30, 7:49 AM PST · 14176 days ago · 6 km deep · 44 km away
17. 1.814 km E of Seven Trees, CaliforniaMon, Nov 30, 12:16 AM PST · 14177 days ago · 2 km deep · 35 km away
18. 2.916 km SSE of Livermore, CaliforniaSun, Nov 29, 6:37 PM PST · 14177 days ago · 2 km deep · 45 km away
19. 1.513 km E of Livermore, CaliforniaSat, Nov 28, 9:03 PM PST · 14178 days ago · 12 km deep · 57 km away
20. 2.113 km SSW of Mountain House, CaliforniaSat, Nov 28, 6:28 PM PST · 14178 days ago · 14 km deep · 58 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc109866. Read Tue, Sep 22, 2026, 9:39 PM UTC.