Earthquake with preliminary magnitude of 6.6 has occurred in preliminary location 37-54N 026-46E vicinity of…
Aegean Sea · HYDROLANT 3333/20
What this record establishes
Archived notice · 2020-10-30 21:11Z
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) · NAVAREA III 1460/20 301514Z OCT 20.. Issued 2020-10-30 15:48Z. 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
- Aegean Sea. The parsed report position is 37.900, 26.767. 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
- Cancel HYDROLANT 3333/20 and this msglater cancellation notice
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.
- USGS-US7000C7Y02020-10-30 · Cancelled notice
- HYDROLANT 3333/20 · this notice2020-10-30 · Archived notice
- issued
- 2020-10-30 15:48Z
- status
- Archived notice
- authority
- NAVAREA III 1460/20 301514Z OCT 20.
- NAVAREA
- NAVAREA III · named as the source of this relay
- sea
- Aegean Sea
- position
- 37.900, 26.767
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
AEGEAN SEA. DNC 09. EARTHQUAKE WITH PRELIMINARY MAGNITUDE OF 6.6 HAS OCCURRED IN PRELIMINARY LOCATION 37-54N 026-46E VICINITY OF SAMOS ISLAND AT 301151Z OCT. STRONG POSSIBILITY OF TSUNAMI IN AEGEAN SEA AND SURROUNDING AREAS.
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.
Collected reports in this area · earthquake & tsunami bulletins
44 within 180 nm since 1997 · 1 in the last 12 months · 0 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.
- 9 km e of kentrí, greece2026-04-24
- 8 km ssw of i̇çmeler, turkey2025-06-02
- 66 km se of emporeío, greece2025-05-22
- 20 km sse of fry, greece2025-05-13
- 60 km se of lárdos, greece2023-01-25
- Earthquake magnitude 5.5 (mww) in 35.836N 026.432E, depth 63 km at 202324Z nov 222022-11-20
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
Worldwide in the collected sources
3 earthquake & tsunami bulletins listed in force · see all
Record snapshot 2026-10-01 11:37Z; 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.