Volcanic activity in the Philippine Sea

Submarine eruptions, discoloured water, pumice rafts.

in force
9
last 12 months
1
vs previous 12 (5)
-80%
since 1996
99

Coverage note: the NGA archive ends 2024-05 and live collection began 2026-08-17. Warnings issued in between are here only if they were still in force when collection started, so 2024–2026 are under-counted.

In force now · 9

  1. HYDROPAC 2242/25in force2025-09-02
    Volcanic activity is reported at Io-To in vicinity of 24-45.00N 141-17.3E.
    North Pacific · Philippine Sea · Japan
  2. NAVAREA XI 491/24in force2024-09-19
    Discoloured water observed near Nanpo Shoto at 31-26.4N 140-03.0E on September 18, 2024 at 0545Z. Vessels advised caution.
    North Pacific, Nanpo Shoto
  3. NAVAREA XI 492/24in force2024-09-19
    As of September 19, a volcanic warning for Sumisu Shima at 31-26.3N 140-03.0E expects eruption influence around the volcano.
    North Pacific, Nanpo Shoto
  4. NAVAREA XI 207/23in force2023-06-14
    Discoloured water and submarine volcanic eruption continue near 24-17.2N 141-28.8E, North Pacific, Nanpo Shoto, at 140350Z June. Caution advised.
    North Pacific, Nanpo Shoto
  5. NAVAREA XI 206/23in force2023-06-14
    On June 14, discoloured water was observed near 25-27.1N 141-14.5E in Nanpo Shoto; vessels advised caution.
    North Pacific, Nanpo Shoto
  6. NAVAREA XI 326/21in force2021-10-13
    Discoloured water observed extending south for 5 miles, 2 miles wide, from 27-16.7N 140-56.6E at 120643Z October.
    North Pacific, Nanpo Shoto
  7. NAVAREA XI 325/21in force2021-10-12
    Discoloured water observed within about 0.7 miles of 27-13.6N 140-55.3E in North Pacific, Nanpo Shoto, at 120643Z Oct.
    North Pacific, Nanpo Shoto
  8. NAVAREA XI 231/21in force2021-07-13
    Discoloured water is sighted near Nanpo Shoto at 24-48.8N 141-19.2E, July 13, 08:00 UTC. Vessels advised caution.
    North Pacific, Nanpo Shoto
  9. NAVAREA XI 488/20in force2020-12-18
    Volcanic warning for Nishino Shima at 27-14.6N 140-52.7E, eruption influence expected within 0.9 mile, canceling warnings 0037 and 0316/20.

Longest in force

  1. NAVAREA XI 488/20in force2020-12-18 · 2,073 d
    Volcanic warning for Nishino Shima at 27-14.6N 140-52.7E, eruption influence expected within 0.9 mile, canceling warnings 0037 and 0316/20.
  2. NAVAREA XI 231/21in force2021-07-13 · 1,866 d
    Discoloured water is sighted near Nanpo Shoto at 24-48.8N 141-19.2E, July 13, 08:00 UTC. Vessels advised caution.
    North Pacific, Nanpo Shoto
  3. NAVAREA XI 325/21in force2021-10-12 · 1,775 d
    Discoloured water observed within about 0.7 miles of 27-13.6N 140-55.3E in North Pacific, Nanpo Shoto, at 120643Z Oct.
    North Pacific, Nanpo Shoto
  4. NAVAREA XI 326/21in force2021-10-13 · 1,774 d
    Discoloured water observed extending south for 5 miles, 2 miles wide, from 27-16.7N 140-56.6E at 120643Z October.
    North Pacific, Nanpo Shoto
  5. NAVAREA XI 207/23in force2023-06-14 · 1,165 d
    Discoloured water and submarine volcanic eruption continue near 24-17.2N 141-28.8E, North Pacific, Nanpo Shoto, at 140350Z June. Caution advised.
    North Pacific, Nanpo Shoto

By year

96
01
02
04
05
06
07
08
09
10
12
13
14
15
16
17
18
19
20
21
22
23
24
25

By month (all years)

J
F
M
A
M
J
J
A
S
O
N
D

Other hazards in the Philippine Sea

Archive · 90 cancelled

  1. HYDROPAC 3334/242024-10-23 → 2025-12-04
    Volcanic activity reported in area within 400 meters of 24-45.44N 141-19.60E
    Philippine Sea · Japan
  2. HYDROPAC 3072/242024-09-19 → 2026-08-17
    Possible volcanic activity reported in Philippine Sea near Japan at 31-26.30N 140-03.00E. Caution advised.
    Philippine Sea · Japan
  3. HYDROPAC 3071/242024-09-19 → 2026-08-17
    Discolored water is reported at 31-26.40N 140-03.00E in Philippine Sea near Japan at 180545Z September; Hydropac 2440/24 is cancelled.
    Philippine Sea · Japan
  4. HYDROPAC 3542/232023-11-10 → 2026-08-14
    Volcanic activity is reported in the Philippine Sea within 400 meters of 24-45.44N 141-19.60E at 04:28 UTC on November 10.
    Philippine Sea · Japan
  5. HYDROPAC 3339/232023-10-20 → 2023-10-23
    Possible pumices adrift in vicinity of trackline joining 30-41.00N 139-51.00E, 30-24.00N 139-45.00E,…
    Philippine Sea · Japan
  6. HYDROPAC 3336/232023-10-20 → 2023-10-20
    Possible pumices adrift in vicinity of trackline joining 30-41.00N 139-51.00E, 30-24.00N 139-45.00E,…
    Philippine Sea · Japan
  7. HYDROPAC 2986/232023-09-19 → 2026-08-14
    Discolored water with submarine volcanic activity is reported near Northern Mariana Islands at 15-37N 145-34E on September 19 at 03:06 UTC.
    Western North Pacific · Northern Mariana Islands
  8. HYDROPAC 1982/232023-06-14 → 2026-08-14
    Discolored water reported at 25-27N 141-14E in Philippine Sea on June 14 at 0425Z, cancels previous warning 1568/23.
    Philippine Sea · Japan
  9. HYDROPAC 1568/232023-05-12 → 2023-06-14
    Discolored water reported in vicinity 25-27.10N 141-14.50E at 110433Z may
    Philippine Sea · Japan
  10. HYDROPAC 2276/222022-08-19 → 2022-08-19
    Discolored water reported in 26-07.40N 141-06.40E on 19 aug
    Philippine Sea · Japan
  11. HYDROPAC 809/222022-03-27 → 2023-05-19
    Volcanic activity expected in vicinity of 25-27.3N 141-14.3E until further notice
    Philippine Sea · Japan
  12. HYDROPAC 2917/212021-10-13 → 2022-03-25
    Discolored water in vicinity 27-16.7N 140-56.6E at 120643Z oct
    Philippine Sea · Japan
  13. HYDROPAC 2909/212021-10-12 → 2021-10-13
    Discolored water in vicinity 27-16.7N 140-56.6E at 120643Z oct
    Philippine Sea · Japan
  14. HYDROPAC 2908/212021-10-12 → 2022-03-25
    Discolored water in vicinity 27-13.6N 140-55.3E at 120643Z oct
    Philippine Sea · Japan
  15. HYDROPAC 2349/212021-08-16 → 2022-03-25
    Volcanic activity reported in 24-17.1N 141-28.9E at 150340Z aug
    Philippine Sea · Japan
  16. HYDROPAC 2340/212021-08-16 → 2021-08-16
    Volcanic activity reported in 27-17.1N 141-28.9E at 150340Z aug
    Philippine Sea · Japan
  17. HYDROPAC 2326/212021-08-13 → 2021-08-16
    Volcanic activity reported in 24-17.1N 141-28.9E
    Philippine Sea · Japan
  18. HYDROPAC 2323/212021-08-13 → 2021-08-13
    Discolored water with submarine volcanic activity reported in 24-17.1N 141-28.9E
    Philippine Sea · Japan
  19. HYDROPAC 2027/212021-07-13 → 2026-08-14
    Discolored water reported near 24-48.8N 141-19.2E in the Philippine Sea, Japan, at 130800Z July.
    Philippine Sea · Japan
  20. HYDROPAC 3739/202020-12-18 → 2022-03-25
    Volcanic activity reported in area within one mile of 27-14.6N 140-52.7E at 180500Z dec
    Philippine Sea · Japan
  21. HYDROPAC 2439/202020-08-20 → 2020-11-07
    Volcanic activity reported in area within two miles of 27-14.6N 140-52.7E at 190500Z aug
    Philippine Sea · Japan
  22. HYDROPAC 379/202020-02-04 → 2020-08-21
    Discolored water in area within five miles of 27-14.6N 140-52.7E at 040542Z feb 20
    Philippine Sea · Japan
  23. HYDROPAC 4159/192019-12-16 → 2020-08-20
    Volcanic activity reported in area within one mile of 27-14.6N 140-52.7E at 160600Z dec
    Philippine Sea · Japan
  24. HYDROPAC 4023/192019-12-05 → 2019-12-16
    Volcanic activity reported in area within one mile of 27-14.6N 140-52.7E at 051110Z dec 19
    Philippine Sea · Japan
  25. HYDROPAC 3569/182018-09-28 → 2018-10-31
    Discolored water with submarine volcanic activity within three miles of 27-14.6N 140-52.7E at 280431Z sep
    Philippine Sea
  26. HYDROPAC 3323/182018-09-12 → 2019-01-04
    Volcanic activity reported in vicinity of 24-45.6N 141-18.7E on 12 sep
    Philippine Sea · Japan
  27. HYDROPAC 2571/182018-07-13 → 2018-10-31
    Volcanic activity reported in area within one mile of 27-14.6N 140-52.7E at 131300Z jul
    Philippine Sea
  28. HYDROPAC 2554/182018-07-12 → 2018-07-13
    Volcanic activity reported in 27-14.6N 140-52.7E at 120502Z jul
    Philippine Sea
  29. HYDROPAC 1391/172017-04-20 → 2018-06-20
    Volcanic activity reported in area within 0.9 mile of 27-14.6N 140-52.7E at 200730Z apr
    Western North Pacific · Japan · Nampo Shoto
  30. HYDROPAC 1389/172017-04-20 → 2017-04-20
    Volcanic activity reported in 27-14.6N 140-52.7E at 200525Z apr
    Western North Pacific · Japan · Nampo Shoto
  31. HYDROPAC 1024/172017-03-24 → 2018-09-07
    Discolored water in vicinity 31-54.5N 140-01.6E at 240250Z mar
    Western North Pacific · Philippine Sea
  32. HYDROPAC 438/162016-02-17 → 2016-08-17
    Volcanic activity reported in 27-14.6N 140-52.7E
    Western North Pacific · Japan · Nampo Shoto
  33. HYDROPAC 1664/152015-05-21 → 2015-06-22
    Discolored water reported vicinity 27-11N 140-48E at 200600Z may
    Western North Pacific · Japan · Nanpo Shoto
  34. HYDROPAC 634/152015-02-24 → 2015-04-09
    Volcanic activity reported in 27-14.9N 140-52.7E
    Western North Pacific · Japan · Nampo Shoto
  35. HYDROPAC 2238/142014-07-31 → 2015-02-24
    Cancel HYDROPAC 1676/14
    Western North Pacific · Japan · Nampo Shoto
  36. HYDROPAC 1676/142014-06-11 → 2014-07-31
    Cancel HYDROPAC 1586/14
    Western North Pacific · Japan · Nampo Shoto
  37. HYDROPAC 1586/142014-06-03 → 2014-06-11
    Cancel HYDROPAC 1072/14
    Western North Pacific · Japan · Nampo Shoto
  38. HYDROPAC 1304/142014-05-05 → 2014-05-06
    Mariana Islands
    Western North Pacific
  39. HYDROPAC 1072/142014-04-16 → 2014-06-03
    Cancel HYDROPAC 215/14
    Western North Pacific · Japan · Nampo Shoto
  40. HYDROPAC 215/142014-01-21 → 2014-04-16
    Cancel HYDROPAC 4013/13
    Western North Pacific · Japan · Nampo Shoto
  41. HYDROPAC 4013/132013-12-26 → 2014-01-21
    Cancel HYDROPAC 3997/13
    Western North Pacific · Japan · Nampo Shoto
  42. HYDROPAC 3997/132013-12-25 → 2013-12-26
    Cancel HYDROPAC 3929/13
    Western North Pacific · Japan · Nampo Shoto
  43. HYDROPAC 3929/132013-12-18 → 2013-12-25
    Cancel HYDROPAC 3811/13
    Western North Pacific · Japan · Nampo Shoto
  44. HYDROPAC 3811/132013-12-06 → 2013-12-18
    Cancel HYDROPAC 3623/13
    Western North Pacific · Japan · Nampo Shoto
  45. HYDROPAC 3623/132013-11-22 → 2013-12-06
    Cancel HYDROPAC 3600/13
    Western North Pacific · Japan · Nampo Shoto
  46. HYDROPAC 3600/132013-11-20 → 2013-11-22
    Nampo Shoto
    Western North Pacific · Japan
  47. HYDROPAC 1222/122012-04-29 → 2018-09-07
    Nampo Shoto
    Western North Pacific
  48. HYDROPAC 375/102010-02-26 → 2011-10-01
    Nga chart 97521 (6TH ed)
    North Pacific
  49. HYDROPAC 221/102010-02-03 → 2010-02-08
    Nga chart 97521 (6TH ed)
    North Pacific
  50. HYDROPAC 889/092009-05-09 → 2010-02-03
    Nga chart 97521 (6TH ed)

Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts and your national MSI service.

Volcanic activity in the Philippine Sea · seahazards