August 23, 1917 Tsunami: Banda Sea, Indonesia
A tsunami of unknown cause began at Banda Sea, Indonesia on August 23, 1917. 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
- August 23, 1917
- Source
- Banda Sea, Indonesia
- Cause
- Unknown
- Runups recorded
- 1
- Tsunami intensity (Soloviev-Imamura)
- 0.5
- Waters
- Ocean
- How certain
- Questionable tsunami
- Source location
- 3.600° S, 128.700° E
The toll
The record gives no deaths, injuries or damage for this tsunami.
What the record says
NCEI’s account, from the sources it cites.
August 23, 1917, 22:00 [local time]. Strong oscillations in the water level were observed at Saparua Bay (reference #414)
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 |
|---|---|---|---|---|---|---|---|
| Saparua Island | Indonesia | 1 | Eyewitness observation of water height |
More
Every tsunami in 1917The 1900sTsunamis of IndonesiaThis 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 1449.