M2.1 earthquake 17 km W of Volcano, Hawaii

Magnitude

2.1 (ml), micro

Local time

Mon, Apr 20, 1981, 12:00 PM HST

UTC

1981-04-20 22:00:52 UTC

Depth

4.4 km (2.7 mi), shallow

Epicenter

19.438° N, 155.398° W

Region

Hawaii

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.3 km horizontally, 1.0 km in depth

Magnitude uncertainty

±0.24

Depth from

From location

Station coverage gap

59°

Stations used

27

• Volcano, HawaiiPopulation 2,575. Forecast17 kmW
• Hilo, HawaiiPopulation 43,263. Forecast46 kmSW
• Honolulu, HawaiiPopulation 350,964. Forecast330 kmSE

After

1. 2.311 km SW of Volcano, HawaiiMon, Apr 20, 12:20 PM HST · 16599 days ago · 2 km deep · 13 km away
2. 3.6Island of Hawaii, HawaiiTue, Apr 21, 2:04 AM HST · 16599 days ago · 2 km deep · 13 km away
3. 2.114 km S of Volcano, HawaiiTue, Apr 21, 2:36 AM HST · 16599 days ago · 9 km deep · 24 km away
4. 2.011 km SW of Volcano, HawaiiTue, Apr 21, 4:47 AM HST · 16598 days ago · 2 km deep · 14 km away
5. 2.113 km SSE of Eden Roc, HawaiiTue, Apr 21, 9:00 AM HST · 16598 days ago · 6 km deep · 38 km away
6. 2.115 km S of Volcano, HawaiiTue, Apr 21, 6:49 PM HST · 16598 days ago · 6 km deep · 24 km away
7. 2.212 km S of Volcano, HawaiiTue, Apr 21, 7:33 PM HST · 16598 days ago · 8 km deep · 22 km away
8. 1.812 km S of Volcano, HawaiiTue, Apr 21, 8:07 PM HST · 16598 days ago · 7 km deep · 22 km away
9. 1.811 km SSE of Volcano, HawaiiTue, Apr 21, 10:12 PM HST · 16598 days ago · 7 km deep · 22 km away
10. 2.015 km S of Volcano, HawaiiWed, Apr 22, 5:27 PM HST · 16597 days ago · 6 km deep · 24 km away
11. 1.97 km SW of Volcano, HawaiiWed, Apr 22, 9:32 PM HST · 16597 days ago · 2 km deep · 13 km away
12. 2.513 km SSE of Fern Forest, HawaiiWed, Apr 22, 11:22 PM HST · 16597 days ago · 9 km deep · 33 km away
13. 2.414 km S of Fern Forest, HawaiiThu, Apr 23, 2:28 AM HST · 16597 days ago · 8 km deep · 31 km away
14. 3.412 km SE of Fern Forest, HawaiiThu, Apr 23, 3:44 AM HST · 16596 days ago · 8 km deep · 35 km away
15. 1.613 km SSE of Volcano, HawaiiThu, Apr 23, 6:35 AM HST · 16596 days ago · 8 km deep · 24 km away
16. 1.514 km S of Volcano, HawaiiThu, Apr 23, 11:45 AM HST · 16596 days ago · 8 km deep · 23 km away
17. 1.910 km S of Volcano, HawaiiThu, Apr 23, 12:36 PM HST · 16596 days ago · 7 km deep · 21 km away
18. 2.8Island of Hawaii, HawaiiThu, Apr 23, 9:38 PM HST · 16596 days ago · 18 km deep · 81 km away
19. 3.115 km S of Fern Forest, HawaiiThu, Apr 23, 10:48 PM HST · 16596 days ago · 8 km deep · 32 km away
20. 2.225 km ESE of Honaunau-Napoopoo, HawaiiFri, Apr 24, 1:39 AM HST · 16596 days ago · -3 km deep · 24 km away
21. 2.016 km S of Fern Forest, HawaiiFri, Apr 24, 7:38 AM HST · 16595 days ago · 5 km deep · 30 km away
22. 2.113 km S of Volcano, HawaiiFri, Apr 24, 12:46 PM HST · 16595 days ago · 7 km deep · 20 km away
23. 2.47 km SW of Volcano, HawaiiFri, Apr 24, 6:00 PM HST · 16595 days ago · 2 km deep · 14 km away
24. 2.47 km SW of Volcano, HawaiiFri, Apr 24, 8:37 PM HST · 16595 days ago · 2 km deep · 14 km away
25. 2.77 km SW of Volcano, HawaiiFri, Apr 24, 8:44 PM HST · 16595 days ago · 2 km deep · 14 km away
26. 1.68 km SW of Volcano, HawaiiFri, Apr 24, 10:13 PM HST · 16595 days ago · 2 km deep · 14 km away
27. 2.315 km NE of P?hala, HawaiiSat, Apr 25, 1:02 AM HST · 16595 days ago · 8 km deep · 17 km away
28. 2.611 km SW of Volcano, HawaiiSat, Apr 25, 3:23 AM HST · 16594 days ago · 2 km deep · 13 km away
29. 2.315 km S of Volcano, HawaiiSat, Apr 25, 4:26 AM HST · 16594 days ago · 9 km deep · 23 km away
30. 2.111 km SSE of Volcano, HawaiiSat, Apr 25, 4:39 AM HST · 16594 days ago · 7 km deep · 23 km away
31. 2.115 km S of Fern Forest, HawaiiSat, Apr 25, 9:50 AM HST · 16594 days ago · 7 km deep · 31 km away
32. 2.012 km SSE of Volcano, HawaiiSat, Apr 25, 10:03 AM HST · 16594 days ago · 7 km deep · 24 km away
33. 2.614 km SSE of Volcano, HawaiiSat, Apr 25, 12:13 PM HST · 16594 days ago · 8 km deep · 25 km away
34. 1.913 km SSE of Volcano, HawaiiSat, Apr 25, 2:06 PM HST · 16594 days ago · 8 km deep · 25 km away
35. 2.214 km S of Volcano, HawaiiSat, Apr 25, 3:34 PM HST · 16594 days ago · 9 km deep · 22 km away
36. 1.914 km S of Volcano, HawaiiSat, Apr 25, 3:49 PM HST · 16594 days ago · 6 km deep · 22 km away
37. 2.515 km S of Fern Forest, HawaiiSat, Apr 25, 6:35 PM HST · 16594 days ago · 8 km deep · 29 km away
38. 2.614 km S of Fern Forest, HawaiiSat, Apr 25, 6:48 PM HST · 16594 days ago · 9 km deep · 32 km away
39. 2.411 km SSE of Volcano, HawaiiSat, Apr 25, 7:20 PM HST · 16594 days ago · 7 km deep · 23 km away
40. 2.611 km S of Volcano, HawaiiSat, Apr 25, 7:53 PM HST · 16594 days ago · 8 km deep · 22 km away
41. 2.114 km SSE of Fern Forest, HawaiiSun, Apr 26, 1:12 AM HST · 16594 days ago · 8 km deep · 33 km away
42. 2.012 km S of Volcano, HawaiiSun, Apr 26, 1:41 AM HST · 16594 days ago · 7 km deep · 22 km away
43. 2.013 km SSE of Volcano, HawaiiSun, Apr 26, 2:48 AM HST · 16594 days ago · 7 km deep · 25 km away
44. 1.913 km SSE of Volcano, HawaiiSun, Apr 26, 5:09 AM HST · 16593 days ago · 7 km deep · 25 km away
45. 2.318 km N of P?hala, HawaiiSun, Apr 26, 8:45 AM HST · 16593 days ago · 11 km deep · 9 km away
46. 1.812 km SSE of Volcano, HawaiiSun, Apr 26, 10:02 AM HST · 16593 days ago · 7 km deep · 23 km away
47. 2.112 km SSE of Fern Forest, HawaiiSun, Apr 26, 11:50 AM HST · 16593 days ago · 8 km deep · 33 km away
48. 2.016 km NE of P?hala, HawaiiSun, Apr 26, 2:28 PM HST · 16593 days ago · 6 km deep · 16 km away
49. 2.210 km SW of Volcano, HawaiiSun, Apr 26, 2:29 PM HST · 16593 days ago · 2 km deep · 14 km away
50. 2.314 km S of Volcano, HawaiiSun, Apr 26, 4:10 PM HST · 16593 days ago · 6 km deep · 23 km away
51. 2.411 km SW of Volcano, HawaiiSun, Apr 26, 7:01 PM HST · 16593 days ago · 2 km deep · 13 km away
52. 1.814 km SSE of Volcano, HawaiiSun, Apr 26, 8:38 PM HST · 16593 days ago · 7 km deep · 27 km away
53. 1.913 km S of Volcano, HawaiiSun, Apr 26, 10:04 PM HST · 16593 days ago · 6 km deep · 23 km away
54. 2.318 km NE of P?hala, HawaiiSun, Apr 26, 11:06 PM HST · 16593 days ago · 2 km deep · 13 km away
55. 2.619 km WSW of Volcano, HawaiiSun, Apr 26, 11:49 PM HST · 16593 days ago · 9 km deep · 7 km away
56. 2.010 km SW of Volcano, HawaiiSun, Apr 26, 11:53 PM HST · 16593 days ago · 2 km deep · 13 km away
57. 2.113 km SSE of Volcano, HawaiiMon, Apr 27, 2:04 AM HST · 16593 days ago · 6 km deep · 25 km away
58. 2.08 km SW of Volcano, HawaiiMon, Apr 27, 2:21 AM HST · 16593 days ago · 1 km deep · 13 km away
59. 2.18 km SW of Volcano, HawaiiMon, Apr 27, 3:33 AM HST · 16592 days ago · 2 km deep · 14 km away
60. 2.225 km ESE of Honaunau-Napoopoo, HawaiiMon, Apr 27, 3:34 AM HST · 16592 days ago · -3 km deep · 24 km away

The first 60 of at least 200.

Before

1. 2.18 km SW of Volcano, HawaiiSun, Apr 19, 9:32 PM HST · 16600 days ago · 2 km deep · 14 km away
2. 2.013 km SSE of Volcano, HawaiiSun, Apr 19, 7:53 PM HST · 16600 days ago · 6 km deep · 25 km away
3. 1.919 km NNE of P?hala, HawaiiSun, Apr 19, 6:51 PM HST · 16600 days ago · 9 km deep · 8 km away
4. 2.220 km WSW of Volcano, HawaiiSun, Apr 19, 5:48 PM HST · 16600 days ago · 8 km deep · 5 km away
5. 2.411 km SW of Volcano, HawaiiSun, Apr 19, 5:33 PM HST · 16600 days ago · 2 km deep · 13 km away
6. 2.011 km SW of Volcano, HawaiiSun, Apr 19, 4:42 PM HST · 16600 days ago · 2 km deep · 13 km away
7. 2.314 km SW of Volcano, HawaiiSun, Apr 19, 3:06 PM HST · 16600 days ago · 2 km deep · 14 km away
8. 2.512 km S of Volcano, HawaiiSun, Apr 19, 1:04 PM HST · 16600 days ago · 7 km deep · 23 km away
9. 2.021 km W of Volcano, HawaiiSun, Apr 19, 9:22 AM HST · 16600 days ago · 8 km deep · 6 km away
10. 1.815 km S of Volcano, HawaiiSun, Apr 19, 8:11 AM HST · 16600 days ago · 7 km deep · 24 km away
11. 2.713 km S of Volcano, HawaiiSun, Apr 19, 4:13 AM HST · 16600 days ago · 8 km deep · 22 km away
12. 1.910 km S of Volcano, HawaiiSun, Apr 19, 3:36 AM HST · 16600 days ago · 8 km deep · 21 km away
13. 2.111 km SW of Volcano, HawaiiSun, Apr 19, 12:37 AM HST · 16601 days ago · 1 km deep · 13 km away
14. 2.012 km SW of P?hoa, HawaiiSat, Apr 18, 10:54 PM HST · 16601 days ago · 7 km deep · 40 km away
15. 2.311 km SW of Volcano, HawaiiSat, Apr 18, 9:12 PM HST · 16601 days ago · 2 km deep · 13 km away
16. 2.85 km NW of Kailua-Kona, HawaiiSat, Apr 18, 7:02 PM HST · 16601 days ago · 10 km deep · 72 km away
17. 2.22 km W of P?hala, HawaiiSat, Apr 18, 6:58 PM HST · 16601 days ago · 7 km deep · 28 km away
18. 2.015 km S of Fern Forest, HawaiiSat, Apr 18, 6:34 PM HST · 16601 days ago · 8 km deep · 30 km away
19. 2.315 km S of Volcano, HawaiiSat, Apr 18, 5:51 PM HST · 16601 days ago · 6 km deep · 24 km away
20. 2.26 km SW of Volcano, HawaiiSat, Apr 18, 4:11 PM HST · 16601 days ago · 2 km deep · 13 km away

From the USGS Earthquake Hazards Program and its partner networks, event hv19811552. Read Thu, Oct 1, 2026, 12:48 AM UTC.