Quakes

Earthquake with preliminary magnitude of 7.4 occurred in 37-30.00N 137-12.00E at 010710Z jan

Japan Sea · HYDROPAC 2/24

What this record establishes

Archived notice · 2024-01-01 08:38Z

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) · PTWC 0/24 010726Z JAN 24.. Issued 2024-01-01 07:38Z. 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
Japan Sea. The parsed report position is 37.750, 138.100. 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-US6000M0XJ2024-01-01 · Cancelled notice
  2. USGS-US6000M0XL2024-01-01 · Cancelled notice
  3. USGS-US6000M0XM2024-01-01 · Cancelled notice
  4. HYDROPAC 2/24 · this notice2024-01-01 · Archived notice
  5. USGS-US6000M0XT2024-01-01 · Cancelled notice
  6. HYDROPAC 5/242024-01-01 · Archived notice
Compare all 10 notices, changes and original texts →

Current notices and reporting history in the Japan Sea →

issued
2024-01-01 07:38Z
status
Archived notice
authority
PTWC 0/24 010726Z JAN 24.
issued by
PTWC
sea
Japan Sea
position
37.750, 138.100
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

SEA OF JAPAN.
JAPAN.
DNC 12.
1. EARTHQUAKE WITH PRELIMINARY MAGNITUDE OF 7.4
   OCCURRED IN 37-30.00N 137-12.00E
   AT 010710Z JAN. TSUNAMI WAVES ARE POSSIBLE
   WHICH COULD CAUSE DAMAGE TO THE
   SURROUNDING COASTS.
2. TSUNAMI ACTIVITY IS FORECASTED TO START AT
   THE FOLLOWING TIMES:
   A. NIIGATA 38-00N 139-00E AT 010750Z.
3. TSUNAMI MAY BE A SERIES OF WAVES WHICH COULD
   BE DANGEROUS FOR SEVERAL HOURS AFTER THE
   INITIAL WAVE ARRIVAL.

Reading this warning

DNC (Digital Nautical Chart)
A reference to one of the regions of NGA's Digital Nautical Chart, used to tell the reader which charts a warning affects.
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.
Date-time group (DTG)
A compact UTC timestamp — day, hour and minute followed by Z — such as 201500Z for the 20th at 15:00 UTC.

All warning terms →

Collected reports in this area · earthquake & tsunami bulletins

184 within 180 nm since 1997 · 3 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 2026-10-01 18:10Z; 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.