Quakes

74 km s of yonakuni, japan

74 km S of Yonakuni, Japan · USGS-US6000TYHK

What this record establishes

Listed in force

The latest collected record lists this warning as active. This is the status of the notice, not a live observation of conditions at the location.

Source and dates
USGS earthquakes at sea, M 5.5+ (FDSN event service) · USGS NEIC. Issued 2026-09-30 05:00Z. First collected 2026-09-30 06:18Z; last seen in collection 2026-09-30 06:18Z. Collection dates record ingestion, not a new incident or a fresh field observation.
Location covered
74 km S of Yonakuni, Japan. The parsed report position is 23.803, 122.915. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.

Current notices and reporting history in the Philippine Sea →

issued
2026-09-30 05:00Z
status
Listed in force
self-cancels
2026-10-03 05:00Z
authority
USGS NEIC
issued by
USGS NEIC
sea
Philippine Sea
position
23.803, 122.915
nearest port
Ishigaki · 75 nm
source
USGS earthquakes at sea, M 5.5+ (FDSN event service) · first seen 2026-09-30 06:18Z

Original warning text

74 KM S OF YONAKUNI, JAPAN.
1. EARTHQUAKE MAGNITUDE 5.6 (MWW) IN 23.803N 122.915E, DEPTH 11 KM AT 300500Z SEP 26.
2. USGS EVENT US6000TYHK. https://earthquake.usgs.gov/earthquakes/eventpage/us6000tyhk

Reading this warning

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 →

Conditions at the position · now

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MET Norway · NOAA WaveWatch III · HYCOM · GEBCO 2020 · model data at the centroid, not an observation

Collected reports in this area · earthquake & tsunami bulletins

183 within 180 nm since 1997 · 6 in the last 12 months · 1 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

2 earthquake & tsunami bulletins listed in force · see all

Record snapshot 2026-09-30 08:06Z; 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.