| 1 | 996 d | Quakes | A magnitude 6.7 earthquake occurs in the Coral Sea near Vanuatu at 220448Z November, and tsunami waves may be dangerous for several hours. Coral Sea · Vanuatu · Coral Sea event | HYDROPAC 3679/23 2023-11-22 → 2026-08-14 |
| 2 | 425 d | Quakes | Tb 08 tsunami buoy, fl (4) 20 sec, established in 12-31.28N 085-30.35E Bay of Bengal | HYDROPAC 2415/06 2006-12-11 → 2008-02-10 |
| 3 | 413 d | Quakes | An earthquake occurred at 202231Z jul with a preliminary magnitude of 6.8, in 36-59N 27-34E Aegean Sea | HYDROLANT 2259/17 2017-07-20 → 2018-09-07 |
| 4 | 361 d | Quakes | Tsunami instrument mooring buoys, orange with white disk, fl w 20 sec, established until 31 jul 1999 as… North Pacific Ocean | NAVAREA XII 241/98 1998-08-04 → 1999-08-01 |
| 5 | 284 d | Quakes | Tsunami buoy established in: a. 09-17.72N 089-23.58E Bay of Bengal | HYDROPAC 747/07 2007-04-24 → 2008-02-03 |
| 6 | 154 d | Quakes | Following recent seismic activity seabed uplift of up to two meters has been reported in some coastal areas… Western South Pacific · New Zealand | HYDROPAC 3523/16 2016-11-15 → 2017-04-18 |
| 7 | 140 d | Quakes | An earthquake occurred at 241047Z oct with a preliminary magnitude of 6.6, in 07-36S 123-08E Banda Sea · Banda Sea event | HYDROPAC 3623/17 2017-10-24 → 2018-03-13 |
| 8 | 100 d | Quakes | Due to the earthquake that occurred on 12 jan numerous navaids have been reported unreliable and new… Haiti · Port-au-prince | NAVAREA IV 24/10 2010-01-14 → 2010-04-24 |
| 9 | 91 d | Quakes | An earthquake occurred at 282023Z apr with a preliminary magnitude of 6.9, in 08-00N 125-00E Western North Pacific | HYDROPAC 1500/17 2017-04-28 → 2017-07-29 |
| 10 | 55 d | Quakes | Due to the recent earthquakes followed by a tsunami mariners are advised that major changes have likely… Andaman Sea | HYDROPAC 38/05 2005-01-06 → 2005-03-02 |
| 11 | 54 d | Quakes | Shipping communication center at once if any vibrations are felt or any other indications of an approaching… Please Inform D.G | HYDROPAC 41/05 2005-01-07 → 2005-03-02 |
| 12 | 51 d | Quakes | This marad advisory provides guidance to vessels transiting to or from ports in japan or in waters in the… Japan-northeast Coast · North Pacific Ocean event | HYDROPAC 850/11 2011-03-18 → 2011-05-09 |
| 13 | 50 d | Quakes | Due to the enormous calamity caused by the earthquake off the northwest coast of sumatra and resulting… | HYDROPAC 1984/04 2004-12-29 → 2005-02-17 |
| 14 | 50 d | Quakes | Due to the enormous calamity caused by the earthquake off the northwest coast of sumatra and resulting… | HYDROLANT 2071/04 2004-12-29 → 2005-02-17 |
| 15 | 49 d | Quakes | Due to tsunami aftermath all aids to navigation in andaman and nicobar islands are unreliable | HYDROPAC 70/05 2005-01-11 → 2005-03-02 |
| 16 | 48 d | Quakes | Earthquake with magnitude of 7.3 has occurred at 090727Z sep and may generate tsunami within 60 miles of… South Pacific Ocean event | HYDROPAC 1462/05 2005-09-09 → 2005-10-27 |
| 17 | 44 d | Quakes | An earthquake has struck northwestern turkey in the vicinity of istanbul, izmit, and the northeastern… | HYDROLANT 1723/99 1999-08-17 → 1999-09-30 |
| 18 | 42 d | Quakes | This marad advisory provides guidance to vessels transiting to or from ports in japan or in waters in the… Japan-northeast Coast · North Pacific Ocean event | NAVAREA XII 99/11 2011-03-18 → 2011-04-30 |
| 19 | 42 d | Quakes | Due to the recent tsunami, aids to navigation may be off station and should not be solely relied upon for… North Pacific · Hawaii | NAVAREA XII 92/11 2011-03-11 → 2011-04-23 |
| 20 | 42 d | Quakes | Mariners are advised that due to the recent tsunami, aids to navigation may be off station and should not be… Western North Pacific | HYDROPAC 769/11 2011-03-12 → 2011-04-23 |