October 26, 975 Tsunami: Marmara Sea, Strait of Bosporus, Turkey
A tsunami of unknown cause began at Marmara Sea, Strait of Bosporus, Turkey on October 26, 975. Its effects were recorded at 1 place.
Where the waves reached
The source (white) and every runup with a place, colored by the water height recorded there. A ring is a runup NCEI marks doubtful.
- Under 1 m
- 1 to 3 m
- 3 to 10 m
- 10 to 30 m
- 30 m and more
- Height not recorded
The tsunami
- Date
- October 26, 975
- Source
- Marmara Sea, Strait of Bosporus, Turkey
- Cause
- Unknown
- Runups recorded
- 1
- Tsunami intensity (Soloviev-Imamura)
- 3
- Waters
- Ocean
- How certain
- Questionable tsunami
- Source location
- 41.040° N, 28.980° E
The toll
The record gives no deaths, injuries or damage for this tsunami.
Every runup
Nearest the source first. Heights are above sea level at the time; a tide gauge reads half the wave’s full height.
| Where | Country | Km from source | Water height, m | Inland, m | Measured by | First wave, UTC | Deaths |
|---|---|---|---|---|---|---|---|
| Marmara Sea, Strait of Bosporus | Turkey | 0 | Eyewitness observation of water height |
More
Every tsunami in 975The 900sTsunamis of TurkeyThis day in weather historyAlerts in force
Sources
Tsunami events and runups from NOAA’s National Centers for Environmental Information, Global Historical Hazard Database, cited as NCEI/WDS, doi:10.7289/V5PN93H7. Public domain. Read 2026-09-24. NCEI tsunami event 81.