September 1845 Tsunami: Nagasaki, Japan
A tsunami caused by an earthquake began at Nagasaki, Japan in September 1845. 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
- September 1845
- Source
- Nagasaki, Japan
- Cause
- Earthquake
- Runups recorded
- 1
- Tsunami intensity (Soloviev-Imamura)
- 0
- Tsunami magnitude (Iida)
- 1
- Waters
- Ocean
- How certain
- Erroneous entry
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.
Reference #150:
Unreliable event.
Reference #414:
1845, September ?. Validity 1. Rumors appeared at Tokyo, that a tsunami had fallen on Nagasaki. Musya considers the report to be doubtful. It is possible that there were waves of storm origin.
[Perrey cites a report about a mild earthquake at Nagasaki on September 17, 1845 at 14:30 (local time). The next earthquake was recorded at Nagasaki on September 27 at 4:00 (local time)].
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 |
|---|---|---|---|---|---|---|---|
| Nagasaki | Japan | Eyewitness observation of water height |
More
Every tsunami in 1845The 1800sTsunamis of JapanAlerts 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 746.