An earthquake of magnitude 5.6 occurs in the Southern Mid-Atlantic Ridge at 35.204 South 016.186 West, depth 10 km, on 26 September at 1306 UTC.
southern Mid-Atlantic Ridge · USGS-US6000TYC3
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 2026-09-29 13:06Z. First collected 2026-09-29 18:18Z; last seen in collection 2026-09-29 18:18Z. Collection dates record ingestion, not a new incident or a fresh field observation.
- Location covered
- southern Mid-Atlantic Ridge. The parsed report position is -35.204, -16.186. 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 South Atlantic Ocean →
- issued
- 2026-09-29 13:06Z
- status
- Listed in force
- self-cancels
- 2026-10-02 13:06Z
- authority
- USGS NEIC
- issued by
- USGS NEIC
- sea
- South Atlantic Ocean
- position
- -35.204, -16.186
- nearest port
- Vitoria · 1556 nm
- source
- USGS earthquakes at sea, M 5.5+ (FDSN event service) · first seen 2026-09-29 18:18Z
Original warning text
SOUTHERN MID-ATLANTIC RIDGE. 1. EARTHQUAKE MAGNITUDE 5.6 (MWW) IN 35.204S 016.186W, DEPTH 10 KM AT 291306Z SEP 26. 2. USGS EVENT US6000TYC3. https://earthquake.usgs.gov/earthquakes/eventpage/us6000tyc3
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.
Conditions at the position · now
loading…
MET Norway · NOAA WaveWatch III · HYCOM · GEBCO 2020 · model data at the centroid, not an observation
Collected reports in this area · earthquake & tsunami bulletins
25 within 180 nm since 1998 · 2 in the last 12 months · 1 listed in force now
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.
- Earthquake magnitude 5.8 (mww) in 35.461S 017.360W, depth 10 km at 260249Z jan 262026-01-26
- Earthquake magnitude 6.2 (mww) in 35.722S 017.044W, depth 10 km at 252216Z jun 252025-06-25
- Earthquake magnitude 5.9 (mww) in 35.965S 017.009W, depth 10 km at 152223Z dec 232023-12-15
- Earthquake magnitude 5.6 (mww) in 35.362S 015.570W, depth 10 km at 111531Z feb 232023-02-11
- Earthquake magnitude 5.5 (mww) in 37.073S 017.012W, depth 10 km at 151319Z jan 212021-01-15
- Earthquake magnitude 5.6 (mww) in 37.123S 017.255W, depth 10 km at 151045Z jan 212021-01-15
Month of issue in the collected archive
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
1 earthquake & tsunami bulletins listed in force · see all
Record snapshot 2026-09-29 21:15Z; 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.