M3.6 earthquake 20 km W of Volcano, Hawaii

Magnitude

3.6 (ML, local (Richter)), minor

Magnitude from

Hawaiian Volcano Observatory

Local time

Fri, May 1, 1987, 12:44 AM HST

UTC

1987-05-01 10:44:41 UTC

Depth

4.1 km (2.5 mi), shallow

Epicenter

19.450° N, 155.432° W

Region

Hawaii

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.3 km horizontally, 0.8 km in depth

Magnitude uncertainty

±0.07

Depth from

From location

Station coverage gap

48°

Stations used

47

• Volcano, HawaiiPopulation 2,575. Forecast21 kmW
• Hilo, HawaiiPopulation 43,263. Forecast47 kmSW
• Honolulu, HawaiiPopulation 350,964. Forecast326 kmSE

After

1. 1.62 km WSW of P?hala, HawaiiFri, May 1, 3:24 AM HST · 14399 days ago · 6 km deep · 29 km away
2. 2.029 km ENE of Honaunau-Napoopoo, HawaiiFri, May 1, 9:19 AM HST · 14399 days ago · 6 km deep · 21 km away
3. 2.36 km SSE of Fern Forest, HawaiiFri, May 1, 9:44 AM HST · 14399 days ago · 0 km deep · 34 km away
4. 1.914 km SSE of Volcano, HawaiiFri, May 1, 1:20 PM HST · 14399 days ago · 8 km deep · 31 km away
5. 2.014 km NNW of Wai‘?hinu, HawaiiFri, May 1, 5:45 PM HST · 14399 days ago · 6 km deep · 36 km away
6. 2.517 km S of Volcano, HawaiiFri, May 1, 6:03 PM HST · 14399 days ago · 10 km deep · 29 km away
7. 1.811 km NNW of P?hala, HawaiiFri, May 1, 7:11 PM HST · 14398 days ago · 8 km deep · 18 km away
8. 1.87 km NNE of P?hala, HawaiiSat, May 2, 2:20 AM HST · 14398 days ago · 9 km deep · 21 km away
9. 1.86 km NNE of P?hala, HawaiiSat, May 2, 2:28 AM HST · 14398 days ago · 8 km deep · 22 km away
10. 1.714 km SSE of Volcano, HawaiiSat, May 2, 9:16 AM HST · 14398 days ago · 6 km deep · 29 km away
11. 1.94 km SW of Volcano, HawaiiSat, May 2, 1:57 PM HST · 14398 days ago · 14 km deep · 18 km away
12. 1.813 km SSE of Fern Forest, HawaiiSat, May 2, 4:23 PM HST · 14398 days ago · 7 km deep · 40 km away
13. 1.915 km SE of Fern Forest, HawaiiSat, May 2, 5:53 PM HST · 14398 days ago · 7 km deep · 42 km away
14. 1.517 km S of Fern Forest, HawaiiSat, May 2, 11:01 PM HST · 14397 days ago · 5 km deep · 35 km away
15. 1.717 km SW of Leilani Estates, HawaiiSun, May 3, 2:45 AM HST · 14397 days ago · 5 km deep · 45 km away
16. 2.515 km SE of Fern Forest, HawaiiSun, May 3, 4:09 PM HST · 14397 days ago · 8 km deep · 41 km away
17. 1.715 km SSE of Volcano, HawaiiMon, May 4, 12:59 AM HST · 14396 days ago · 5 km deep · 31 km away
18. 1.914 km SSE of Volcano, HawaiiMon, May 4, 1:13 AM HST · 14396 days ago · 7 km deep · 29 km away
19. 1.612 km N of P?hala, HawaiiMon, May 4, 2:40 AM HST · 14396 days ago · 8 km deep · 16 km away
20. 2.013 km SSE of Fern Forest, HawaiiMon, May 4, 5:40 AM HST · 14396 days ago · 7 km deep · 37 km away
21. 2.35 km SSW of Volcano, HawaiiMon, May 4, 6:03 AM HST · 14396 days ago · 2 km deep · 19 km away
22. 1.816 km S of Fern Forest, HawaiiMon, May 4, 5:18 PM HST · 14396 days ago · 7 km deep · 35 km away
23. 1.517 km N of P?hala, HawaiiTue, May 5, 4:01 AM HST · 14395 days ago · 8 km deep · 11 km away
24. 1.614 km NNW of Wai‘?hinu, HawaiiTue, May 5, 1:36 PM HST · 14395 days ago · 7 km deep · 39 km away
25. 2.112 km S of Volcano, HawaiiTue, May 5, 1:37 PM HST · 14395 days ago · 6 km deep · 26 km away
26. 1.87 km SW of Volcano, HawaiiTue, May 5, 7:28 PM HST · 14394 days ago · 2 km deep · 17 km away
27. 2.11 km S of P?hala, HawaiiTue, May 5, 11:12 PM HST · 14394 days ago · 33 km deep · 30 km away
28. 3.519 km SSE of Honaunau-Napoopoo, HawaiiWed, May 6, 1:12 PM HST · 14394 days ago · 8 km deep · 41 km away
29. 2.35 km WSW of P?hala, HawaiiWed, May 6, 3:57 PM HST · 14394 days ago · 38 km deep · 31 km away
30. 2.313 km S of Pa‘auilo, HawaiiWed, May 6, 9:36 PM HST · 14393 days ago · 34 km deep · 53 km away
31. 2.014 km S of Fern Forest, HawaiiThu, May 7, 3:09 AM HST · 14393 days ago · 7 km deep · 34 km away
32. 2.312 km SSE of Fern Forest, HawaiiThu, May 7, 4:06 PM HST · 14393 days ago · 7 km deep · 39 km away
33. 2.34 km WSW of P?hala, HawaiiSat, May 9, 10:57 PM HST · 14390 days ago · 38 km deep · 30 km away
34. 2.422 km WNW of Volcano, HawaiiSun, May 10, 6:38 AM HST · 14390 days ago · 21 km deep · 8 km away
35. 2.2Island of Hawaii, HawaiiSun, May 10, 8:50 AM HST · 14390 days ago · 8 km deep · 10 km away
36. 2.841 km ESE of Naalehu, HawaiiSun, May 10, 7:44 PM HST · 14389 days ago · 24 km deep · 64 km away
37. 2.315 km S of Fern Forest, HawaiiSun, May 10, 8:45 PM HST · 14389 days ago · 8 km deep · 34 km away
38. 1.614 km S of Volcano, HawaiiMon, May 11, 2:11 AM HST · 14389 days ago · 7 km deep · 27 km away
39. 1.67 km N of P?hala, HawaiiMon, May 11, 10:29 AM HST · 14389 days ago · 8 km deep · 21 km away
40. 1.820 km N of P?hala, HawaiiMon, May 11, 3:01 PM HST · 14389 days ago · 8 km deep · 7 km away
41. 2.33 km NE of Honaunau-Napoopoo, HawaiiTue, May 12, 5:28 AM HST · 14388 days ago · 7 km deep · 43 km away
42. 1.913 km SSE of Volcano, HawaiiTue, May 12, 8:36 AM HST · 14388 days ago · 8 km deep · 29 km away
43. 2.116 km S of Volcano, HawaiiTue, May 12, 1:27 PM HST · 14388 days ago · 7 km deep · 28 km away
44. 2.915 km WNW of Volcano, HawaiiTue, May 12, 7:51 PM HST · 14387 days ago · 7 km deep · 9 km away
45. 1.525 km N of P?hala, HawaiiTue, May 12, 9:04 PM HST · 14387 days ago · 8 km deep · 5 km away
46. 2.120 km SSW of Leilani Estates, HawaiiWed, May 13, 6:02 AM HST · 14387 days ago · 39 km deep · 50 km away
47. 2.016 km S of Fern Forest, HawaiiWed, May 13, 2:52 PM HST · 14387 days ago · 7 km deep · 34 km away
48. 1.69 km WSW of Volcano, HawaiiWed, May 13, 3:30 PM HST · 14387 days ago · 4 km deep · 13 km away
49. 1.813 km SSE of Fern Forest, HawaiiWed, May 13, 4:29 PM HST · 14387 days ago · 7 km deep · 37 km away
50. 1.717 km NE of P?hala, HawaiiThu, May 14, 12:15 AM HST · 14386 days ago · 5 km deep · 19 km away
51. 2.26 km SSW of Volcano, HawaiiThu, May 14, 2:37 AM HST · 14386 days ago · 2 km deep · 20 km away
52. 1.714 km SSE of Fern Forest, HawaiiThu, May 14, 4:45 AM HST · 14386 days ago · 6 km deep · 37 km away
53. 1.511 km ENE of P?hala, HawaiiThu, May 14, 11:53 AM HST · 14386 days ago · 7 km deep · 22 km away
54. 2.018 km NNE of P?hala, HawaiiThu, May 14, 3:52 PM HST · 14386 days ago · 9 km deep · 12 km away
55. 3.36 km N of Wai‘?hinu, HawaiiThu, May 14, 6:53 PM HST · 14385 days ago · 9 km deep · 40 km away
56. 2.513 km SSE of Fern Forest, HawaiiThu, May 14, 8:18 PM HST · 14385 days ago · 8 km deep · 37 km away
57. 2.417 km SSW of Pa‘auilo, HawaiiFri, May 15, 2:52 PM HST · 14385 days ago · 27 km deep · 51 km away
58. 3.212 km N of Wai‘?hinu, HawaiiSat, May 16, 12:17 AM HST · 14384 days ago · 8 km deep · 34 km away
59. 1.716 km SE of Fern Forest, HawaiiSat, May 16, 2:24 AM HST · 14384 days ago · 7 km deep · 42 km away
60. 1.6Island of Hawaii, HawaiiSat, May 16, 5:05 AM HST · 14384 days ago · 8 km deep · 13 km away

The first 60 of at least 199.

Before

1. 2.42 km S of P?hala, HawaiiFri, May 1, 12:19 AM HST · 14399 days ago · 33 km deep · 30 km away
2. 1.613 km SE of Fern Forest, HawaiiThu, Apr 30, 10:54 PM HST · 14399 days ago · 4 km deep · 41 km away
3. 2.024 km W of Volcano, HawaiiThu, Apr 30, 7:14 PM HST · 14399 days ago · 9 km deep · 5 km away
4. 1.914 km S of Fern Forest, HawaiiThu, Apr 30, 12:06 PM HST · 14400 days ago · 7 km deep · 33 km away
5. 3.0Island of Hawaii, HawaiiThu, Apr 30, 3:59 AM HST · 14400 days ago · 8 km deep · 36 km away
6. 2.016 km S of Fern Forest, HawaiiWed, Apr 29, 11:40 PM HST · 14400 days ago · 9 km deep · 35 km away
7. 1.910 km S of Volcano, HawaiiWed, Apr 29, 11:00 PM HST · 14400 days ago · 7 km deep · 25 km away
8. 1.819 km N of P?hala, HawaiiWed, Apr 29, 8:50 PM HST · 14400 days ago · 8 km deep · 10 km away
9. 2.61 km S of P?hala, HawaiiWed, Apr 29, 5:13 PM HST · 14401 days ago · 32 km deep · 30 km away
10. 2.36 km SW of Volcano, HawaiiWed, Apr 29, 2:16 PM HST · 14401 days ago · 15 km deep · 18 km away
11. 1.816 km N of P?hala, HawaiiWed, Apr 29, 2:02 PM HST · 14401 days ago · 3 km deep · 11 km away
12. 2.314 km SSE of Volcano, HawaiiWed, Apr 29, 1:22 PM HST · 14401 days ago · 9 km deep · 31 km away
13. 1.614 km S of Volcano, HawaiiWed, Apr 29, 7:38 AM HST · 14401 days ago · 7 km deep · 27 km away
14. 1.612 km SSE of Volcano, HawaiiTue, Apr 28, 5:21 AM HST · 14402 days ago · 7 km deep · 27 km away
15. 1.610 km S of Volcano, HawaiiTue, Apr 28, 2:32 AM HST · 14402 days ago · 8 km deep · 22 km away
16. 1.67 km WNW of Volcano, HawaiiMon, Apr 27, 11:53 PM HST · 14402 days ago · 11 km deep · 14 km away
17. 1.820 km N of P?hala, HawaiiMon, Apr 27, 6:08 PM HST · 14402 days ago · 7 km deep · 9 km away
18. 3.10 km NNE of P?hala, HawaiiMon, Apr 27, 1:28 PM HST · 14403 days ago · 0 km deep · 27 km away
19. 2.41 km S of P?hala, HawaiiMon, Apr 27, 1:11 PM HST · 14403 days ago · 31 km deep · 29 km away
20. 2.59 km WSW of Volcano, HawaiiMon, Apr 27, 7:02 AM HST · 14403 days ago · 4 km deep · 13 km away

From the USGS Earthquake Hazards Program and its partner networks, event hv238468. Read Fri, Oct 2, 2026, 3:35 PM UTC.