M1.7 earthquake 23 km WNW of Volcano, Hawaii

Magnitude

1.7 (ML, local (Richter)), micro

Magnitude from

Hawaiian Volcano Observatory

Local time

Thu, May 21, 1987, 3:33 AM HST

UTC

1987-05-21 13:33:12 UTC

Depth

3.3 km (2.0 mi), shallow

Epicenter

19.497° N, 155.451° 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

±0.10

Depth from

From location

Station coverage gap

94°

Stations used

20

• Volcano, HawaiiPopulation 2,575. Forecast23 kmWNW
• Hilo, HawaiiPopulation 43,263. Forecast46 kmSW
• Honolulu, HawaiiPopulation 350,964. Forecast322 kmSE

After

1. 1.916 km SE of Fern Forest, HawaiiThu, May 21, 4:01 AM HST · 14378 days ago · 6 km deep · 47 km away
2. 2.321 km SSW of Leilani Estates, HawaiiThu, May 21, 10:40 PM HST · 14377 days ago · 38 km deep · 53 km away
3. 1.912 km SW of Leilani Estates, HawaiiFri, May 22, 1:42 AM HST · 14377 days ago · 7 km deep · 50 km away
4. 1.924 km N of P?hala, HawaiiFri, May 22, 9:55 AM HST · 14377 days ago · 7 km deep · 8 km away
5. 1.65 km SSW of Volcano, HawaiiFri, May 22, 4:46 PM HST · 14376 days ago · 2 km deep · 22 km away
6. 1.914 km SE of Eden Roc, HawaiiSat, May 23, 4:03 AM HST · 14376 days ago · 8 km deep · 46 km away
7. 1.711 km SW of Volcano, HawaiiSat, May 23, 7:15 AM HST · 14376 days ago · 2 km deep · 22 km away
8. 1.821 km SSW of Leilani Estates, HawaiiSat, May 23, 8:49 PM HST · 14375 days ago · 34 km deep · 52 km away
9. 1.914 km SSE of Fern Forest, HawaiiSat, May 23, 11:09 PM HST · 14375 days ago · 8 km deep · 43 km away
10. 1.615 km S of Volcano, HawaiiSun, May 24, 12:18 AM HST · 14375 days ago · 6 km deep · 32 km away
11. 1.613 km SSE of Fern Forest, HawaiiSun, May 24, 7:21 AM HST · 14375 days ago · 8 km deep · 42 km away
12. 3.017 km SSW of Honoka‘a, HawaiiMon, May 25, 3:03 AM HST · 14374 days ago · 13 km deep · 50 km away
13. 2.020 km N of P?hala, HawaiiMon, May 25, 11:24 AM HST · 14374 days ago · 6 km deep · 13 km away
14. 1.914 km SSE of Fern Forest, HawaiiMon, May 25, 5:30 PM HST · 14373 days ago · 6 km deep · 40 km away
15. 2.526 km N of P?hala, HawaiiMon, May 25, 7:58 PM HST · 14373 days ago · 7 km deep · 8 km away
16. 2.51 km S of P?hala, HawaiiMon, May 25, 9:44 PM HST · 14373 days ago · 32 km deep · 35 km away
17. 2.511 km SSE of Volcano, HawaiiTue, May 26, 12:52 PM HST · 14373 days ago · 7 km deep · 32 km away
18. 2.249 km ESE of P?hala, HawaiiTue, May 26, 2:52 PM HST · 14372 days ago · 7 km deep · 71 km away
19. 1.922 km E of P?hala, HawaiiTue, May 26, 8:24 PM HST · 14372 days ago · 45 km deep · 42 km away
20. 2.19 km E of P?hala, HawaiiTue, May 26, 8:31 PM HST · 14372 days ago · 61 km deep · 34 km away
21. 2.41 km ESE of Captain Cook, HawaiiTue, May 26, 10:18 PM HST · 14372 days ago · 8 km deep · 48 km away
22. 2.02 km ESE of Captain Cook, HawaiiTue, May 26, 11:06 PM HST · 14372 days ago · 7 km deep · 47 km away
23. 3.29 km W of Kalaoa, HawaiiWed, May 27, 9:19 AM HST · 14372 days ago · 7 km deep · 70 km away
24. 2.316 km W of Volcano, HawaiiWed, May 27, 1:28 PM HST · 14372 days ago · 7 km deep · 10 km away
25. 1.813 km SE of Waimea, HawaiiWed, May 27, 8:30 PM HST · 14371 days ago · 11 km deep · 50 km away
26. 1.610 km W of Volcano, HawaiiWed, May 27, 9:09 PM HST · 14371 days ago · 2 km deep · 15 km away
27. 1.513 km NNE of P?hala, HawaiiWed, May 27, 9:19 PM HST · 14371 days ago · 9 km deep · 20 km away
28. 2.218 km SSE of Honaunau-Napoopoo, HawaiiWed, May 27, 9:42 PM HST · 14371 days ago · 7 km deep · 42 km away
29. 2.416 km WNW of Kalaoa, HawaiiWed, May 27, 10:23 PM HST · 14371 days ago · 37 km deep · 77 km away
30. 1.99 km WSW of Volcano, HawaiiWed, May 27, 11:32 PM HST · 14371 days ago · 5 km deep · 17 km away
31. 1.815 km SSE of Volcano, HawaiiThu, May 28, 12:56 AM HST · 14371 days ago · 6 km deep · 36 km away
32. 1.619 km W of Volcano, HawaiiThu, May 28, 1:09 AM HST · 14371 days ago · 3 km deep · 6 km away
33. 1.91 km SW of Kapaau, HawaiiThu, May 28, 6:14 PM HST · 14370 days ago · 6 km deep · 89 km away
34. 2.412 km NNW of Wai‘?hinu, HawaiiFri, May 29, 6:35 AM HST · 14370 days ago · 4 km deep · 40 km away
35. 2.324 km WNW of Volcano, HawaiiFri, May 29, 8:27 AM HST · 14370 days ago · 2 km deep · 1 km away
36. 2.16 km SSW of Volcano, HawaiiFri, May 29, 1:07 PM HST · 14370 days ago · 3 km deep · 23 km away
37. 2.015 km S of Fern Forest, HawaiiFri, May 29, 4:53 PM HST · 14369 days ago · 7 km deep · 38 km away
38. 1.713 km SSE of Volcano, HawaiiFri, May 29, 8:58 PM HST · 14369 days ago · 7 km deep · 34 km away
39. 3.014 km SSE of Volcano, HawaiiSat, May 30, 1:37 PM HST · 14369 days ago · 10 km deep · 35 km away
40. 1.816 km S of Volcano, HawaiiSat, May 30, 4:07 PM HST · 14368 days ago · 9 km deep · 32 km away
41. 2.014 km SSE of Fern Forest, HawaiiSat, May 30, 11:20 PM HST · 14368 days ago · 6 km deep · 43 km away
42. 2.021 km SSW of Leilani Estates, HawaiiSun, May 31, 6:37 AM HST · 14368 days ago · 36 km deep · 52 km away
43. 1.9Island of Hawaii, HawaiiSun, May 31, 12:26 PM HST · 14368 days ago · 8 km deep · 17 km away
44. 1.717 km NE of P?hala, HawaiiSun, May 31, 1:12 PM HST · 14368 days ago · 7 km deep · 26 km away
45. 1.917 km SSE of Fern Forest, HawaiiSun, May 31, 10:59 PM HST · 14367 days ago · 6 km deep · 46 km away
46. 1.98 km SSW of Ainaloa, HawaiiMon, Jun 1, 12:44 AM HST · 14367 days ago · 3 km deep · 46 km away
47. 1.615 km N of P?hala, HawaiiMon, Jun 1, 4:50 AM HST · 14367 days ago · 10 km deep · 17 km away
48. 2.222 km N of P?hala, HawaiiMon, Jun 1, 6:40 AM HST · 14367 days ago · 7 km deep · 11 km away
49. 2.421 km W of Volcano, HawaiiMon, Jun 1, 3:38 PM HST · 14366 days ago · 0 km deep · 3 km away
50. 3.215 km S of Fern Forest, HawaiiMon, Jun 1, 10:58 PM HST · 14366 days ago · 8 km deep · 39 km away
51. 1.816 km S of Fern Forest, HawaiiTue, Jun 2, 2:18 AM HST · 14366 days ago · 8 km deep · 39 km away
52. 2.44 km W of Captain Cook, HawaiiTue, Jun 2, 8:14 AM HST · 14366 days ago · 9 km deep · 54 km away
53. 1.920 km W of Volcano, HawaiiTue, Jun 2, 8:57 AM HST · 14366 days ago · 5 km deep · 4 km away
54. 2.522 km ENE of Honaunau-Napoopoo, HawaiiTue, Jun 2, 9:28 AM HST · 14366 days ago · 11 km deep · 26 km away
55. 2.07 km WNW of P?hala, HawaiiTue, Jun 2, 4:49 PM HST · 14365 days ago · 5 km deep · 32 km away
56. 1.75 km WSW of P?hala, HawaiiTue, Jun 2, 6:44 PM HST · 14365 days ago · 4 km deep · 35 km away
57. 2.024 km W of Volcano, HawaiiTue, Jun 2, 9:51 PM HST · 14365 days ago · 8 km deep · 7 km away
58. 1.812 km NNW of Wai‘?hinu, HawaiiWed, Jun 3, 4:43 AM HST · 14365 days ago · 3 km deep · 44 km away
59. 1.723 km W of Paukaa, HawaiiWed, Jun 3, 10:17 AM HST · 14365 days ago · 11 km deep · 33 km away
60. 2.115 km NNW of Wai‘?hinu, HawaiiWed, Jun 3, 12:54 PM HST · 14365 days ago · 3 km deep · 42 km away

The first 60 of at least 202.

Before

1. 1.712 km SSE of Volcano, HawaiiWed, May 20, 7:22 PM HST · 14378 days ago · 6 km deep · 33 km away
2. 1.610 km WSW of Volcano, HawaiiWed, May 20, 6:57 PM HST · 14378 days ago · 5 km deep · 15 km away
3. 2.213 km SE of Waimea, HawaiiWed, May 20, 9:13 AM HST · 14379 days ago · 10 km deep · 51 km away
4. 2.110 km WSW of Volcano, HawaiiWed, May 20, 8:27 AM HST · 14379 days ago · 5 km deep · 15 km away
5. 1.814 km WSW of Volcano, HawaiiWed, May 20, 1:28 AM HST · 14379 days ago · 10 km deep · 16 km away
6. 1.65 km SW of Volcano, HawaiiTue, May 19, 10:39 PM HST · 14379 days ago · 2 km deep · 22 km away
7. 1.815 km S of Volcano, HawaiiTue, May 19, 9:47 PM HST · 14379 days ago · 7 km deep · 33 km away
8. 2.314 km S of Volcano, HawaiiTue, May 19, 7:30 AM HST · 14380 days ago · 9 km deep · 30 km away
9. 2.116 km S of Volcano, HawaiiTue, May 19, 7:23 AM HST · 14380 days ago · 8 km deep · 32 km away
10. 1.813 km SW of P?hoa, HawaiiTue, May 19, 5:02 AM HST · 14380 days ago · 8 km deep · 46 km away
11. 3.215 km S of Volcano, HawaiiTue, May 19, 4:57 AM HST · 14380 days ago · 6 km deep · 32 km away
12. 3.214 km SW of Leilani Estates, HawaiiTue, May 19, 4:56 AM HST · 14380 days ago · 9 km deep · 48 km away
13. 2.014 km S of Volcano, HawaiiTue, May 19, 4:40 AM HST · 14380 days ago · 8 km deep · 31 km away
14. 1.915 km S of Volcano, HawaiiTue, May 19, 4:37 AM HST · 14380 days ago · 7 km deep · 31 km away
15. 1.815 km S of Volcano, HawaiiTue, May 19, 4:36 AM HST · 14380 days ago · 8 km deep · 31 km away
16. 1.815 km S of Volcano, HawaiiTue, May 19, 4:33 AM HST · 14380 days ago · 7 km deep · 31 km away
17. 1.514 km S of Volcano, HawaiiTue, May 19, 3:13 AM HST · 14380 days ago · 6 km deep · 31 km away
18. 1.6Island of Hawaii, HawaiiTue, May 19, 1:05 AM HST · 14380 days ago · 2 km deep · 23 km away
19. 1.915 km S of Fern Forest, HawaiiMon, May 18, 3:51 PM HST · 14380 days ago · 7 km deep · 39 km away
20. 1.824 km W of Volcano, HawaiiMon, May 18, 7:46 AM HST · 14381 days ago · 5 km deep · 6 km away

From the USGS Earthquake Hazards Program and its partner networks, event hv240293. Read Thu, Oct 1, 2026, 11:49 AM UTC.