Quakes

This marad advisory provides guidance to vessels transiting to or from ports in japan or in waters in the…

North Pacific Ocean · HYDROPAC 850/11

What this record establishes

Archived notice · 2011-05-09 00:00Z

This notice comes from the historical archive. Its archived status does not establish when or how the reported situation ended.

Source and dates
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · MARAD ADVISORY 2/11 181545Z MAR 11.. Issued 2011-03-18 16:18Z. First collected 2026-08-17 13:38Z; last seen in collection 2026-08-17 15:46Z. Collection dates record ingestion, not a new incident or a fresh field observation.
Location covered
North Pacific Ocean. The parsed report position is 37.317, 141.017. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.

Related notices and cancellation links

These reports were linked by category and sea, with positions within 30 nautical miles and issue dates within 30 days of another report's recorded in-force span. Links can extend through other members, so the full group can cover a larger area or period. Proximity does not confirm that they describe one incident.

  1. USGS-USP000HUJS2011-02-15 · Cancelled notice
  2. USGS-USP000HVHJ2011-03-09 · Cancelled notice
  3. USGS-USP000HVHM2011-03-09 · Cancelled notice
  4. USGS-USP000HVHN2011-03-09 · Cancelled notice
  5. USGS-USP000HVJ22011-03-09 · Cancelled notice
  6. USGS-USP000HVK62011-03-09 · Cancelled notice
Compare all 221 notices, changes and original texts →

Current notices and reporting history in the North Pacific Ocean →

issued
2011-03-18 16:18Z
status
Archived notice
authority
MARAD ADVISORY 2/11 181545Z MAR 11.
issued by
MARAD ADVISORY
sea
North Pacific Ocean
position
37.317, 141.017
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

JAPAN-NORTHEAST COAST.
1. THIS MARAD ADVISORY PROVIDES GUIDANCE TO VESSELS
   TRANSITING TO OR FROM PORTS IN JAPAN OR IN WATERS
   IN THE VICINITY OF THE NORTHEAST COAST OF THE
   ISLAND OF HONSHU.
2. U.S. FLAG OPERATORS WITH SHIPS IN THE AFFECTED
   AREAS ARE REQUESTED TO FORWARD THIS ADVISORY TO
   THEIR SHIPS BY THE MOST EXPEDITIOUS MEANS.
3. A 8.9/9.0 MAGNITUDE EARTHQUAKE STRUCK THE PACIFIC OCEAN
   NEAR NORTHEASTERN JAPAN AT AROUND 1446 ON MARCH 11 (JST)
   CAUSING DAMAGE WITH BLACKOUTS, FIRE AND A TSUNAMI.
   NUCLEAR POWER PLANTS NEAR FUKUSHIMA WERE DAMAGED AND
   RADIATION RELEASE WAS DETECTED AND IS BEING MONITORED
   BY JAPAN.
4. IN RESPONSE TO THE SITUATION AT THE FUKUSHIMA NUCLEAR
   POWER PLANT, THE UNITED STATES NUCLEAR REGULATORY
   COMMISSION (NRC), THE DEPARTMENT OF ENERGY AND OTHER
   TECHNICAL EXPERTS IN THE U.S. GOVERNMENT HAVE REVIEWED
   SCIENTIFIC AND TECHNICAL INFORMATION COLLECTED FROM
   ASSETS IN JAPAN, AS WELL AS WHAT THE GOVERNMENT OF JAPAN
   HAS DISSEMINATED. CONSISTENT WITH THE RESULTS OF THAT
   REVIEW, NRC GUIDELINES AND GUIDANCE ISSUED BY THE U.S.
   AMBASSADOR TO JAPAN, THE U.S. COAST GUARD RECOMMENDS,
   AS A PRECAUTION, THAT VESSELS AVOID TRANSITING WITHIN
   50 MILES (80 KILOMETERS) OF THE FUKUSHIMA NUCLEAR POWER
   PLANT AT 37-19N 141-01E. MARINERS ARE ADVISED THAT THIS
   RECOMMENDATION SHOULD BE CONSIDERED A MINIMUM DISTANCE
   FROM THE FUKUSHIMA NUCLEAR POWER PLANT SHOULD BE AVOIDED.
   PRUDENT TRACKLINE PLANNING SHOULD INCORPORATE CURRENT
   WIND AND WEATHER CONDITIONS.
5. MARINERS ARE ADVISED TO MONITOR AND COMPLY WITH NAVTEX
   AND NAVAREA XI WARNINGS. MARINERS SHOULD KEEP ABREAST
   OF INFORMATION BEING PROVIDED BY THE GOVERNMENT OF JAPAN
   RELATING TO ANY FURTHER POTENTIAL IMPACTS. THE MARTIME
   ADMINISTRATION AND THE U.S. COAST GUARD WILL PROVIDE
   UPDATED NOTICES AS ADDITIONAL GUIDANCE BECOMES AVAILABLE.
6. IN THE EVENT A VESSEL BOUND FOR A U.S. PORT TRANSITS WITHIN
   THE 50-MILE (80-KILOMETER), PRECAUTIONARY AREA, THE U.S.
   COAST GUARD RECOMMENDS THE VESSEL'S MASTER TO SUBMIT TRANSIT
   INFORMATION, INCLUDING THE DATE AND TOTAL TIME WITHIN THE
   PRECAUTIONARY AREA, TO THE COGNIZANT U.S. COAST GUARD
   CAPTAIN OF THE PORT USING THE COMMENT BLOCK ON THE 96 HR
   ADVANCED NOTICE OF ARRIVAL.
7. THIS ADVISORY WILL BE PUBLISHED ON THE MARAD WEB SITE
   AT WWW.MARAD.DOT.GOV UNDER THE NEWSROOM TAB.
8. FOR FURTHER INFORMATION REGARDING THIS ADVISORY, CONTACT
   CAPTAIN ROBERT FORD, MARITIME ADMINISTRATION,
   OFFICE OF SECURITY, CODE: MAR-420, ROOM W25-308,
   1200 NEW JERSEY AVE, S.E., WASHINGTON, DC 20590,
   PHONE: 202 366 0223, FAX: 202 366 3954,
   TELEX: 710 822 9426 (MARAD DOT WSH) OR
   E-MAIL: MARADSECURITY@DOT.GOV.

Reading this warning

Position (degrees and minutes)
How warnings write positions: degrees, a hyphen, then minutes, with N/S and E/W — 49-40.8N 003-43.8W.
Track line joining
Introduces a route through a series of positions — a cable route, a tow's track or a survey line.
NAVTEX
An automated medium-frequency radio service that sends coastal warnings as text to a small printer or screen on board.
NAVAREA
One of the 21 ocean areas of the World-Wide Navigational Warning Service, each with a coordinator that broadcasts long-range warnings.

All warning terms →

Collected reports in this area · earthquake & tsunami bulletins

479 within 180 nm since 1997 · 16 in the last 12 months · 0 listed in force now

97
00
05
10
15
20
25
26

Counts include repeat notices about the same situation. NGA archive coverage ends 2024-05; live collection began 2026-08-17. The period between them is incomplete. An empty year is not evidence that no hazards occurred.

Month of issue in the collected archive

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

All available years combined. Uneven collection and repeat bulletins affect these counts; this chart does not measure the seasonality or probability of incidents.

Nearby notices listed in force · within 120 nm

No other collected notice is currently listed in force within this radius. This does not establish safe conditions.

Worldwide in the collected sources

3 earthquake & tsunami bulletins listed in force · see all

Record snapshot 2026-10-03 02:31Z; source collection times vary.

Quakes

Undersea earthquakes of magnitude 5.5 and above (USGS) and the tsunami bulletins NAVAREA coordinators relay. All current earthquake & tsunami bulletins →

Not for navigation. This is a re-rendering of an official navigational warning for awareness; mariners must use official NAVAREA broadcasts and their national MSI service.