Quakes · tsunami
97 km sw of adak, alaska
USGS-US1000GFVG
- issued
- 2018-08-23 03:35Z
- status
- cancelled 2018-08-26 03:35Z
- self-cancels
- 2018-08-26 03:35Z
- authority
- USGS NEIC
- sea
- North Pacific Ocean
- position
- 51.350, -177.760
- source
- usgs · first seen 2026-09-03 15:13Z
Original warning text
97 KM SW OF ADAK, ALASKA. 1. EARTHQUAKE MAGNITUDE 6.3 (MWW) IN 51.350N 177.760W, DEPTH 20 KM AT 230335Z AUG 18. 2. A TSUNAMI MESSAGE WAS ISSUED FOR THIS EVENT. FOLLOW THE TSUNAMI WARNING CENTRES. 3. USGS EVENT US1000GFVG. https://earthquake.usgs.gov/earthquakes/eventpage/us1000gfvg
This area · earthquake & tsunami bulletins
143 within 180 nm since 1997 · 3 in the last 12 months · 0 in force now
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- 103 km se of atka, alaska2026-07-26
- 67 km ssw of adak, alaska2025-11-23
- 122 km sw of adak, alaska2025-09-21
- 88 km sse of adak, alaska2025-03-22
- 87 km sse of adak, alaska2025-03-21
- 88 km sse of adak, alaska2025-03-21
Season · when earthquake & tsunami bulletins happen here
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month of issue, all years in the archive
Timeline · 2 messages since 2018-08-15 · closed 2018-08-26
- 108 km wsw of adak, alaska2018-08-15 → 2018-08-18
- 97 km sw of adak, alaska this message2018-08-23 → 2018-08-26
joined by proximity
Nearby now · within 120 nm
Nothing else in force within 120 nm.
Worldwide now
5 earthquake & tsunami bulletins in force · see all
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.