August 6, 1434 Tsunami: Inchon, Chemulpo Bay, Yellow Sea, South Korea
A tsunami of unknown cause began at Inchon, Chemulpo Bay, Yellow Sea, South Korea on August 6, 1434. 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 6, 1434
- Source
- Inchon, Chemulpo Bay, Yellow Sea, South Korea
- Cause
- Unknown
- Runups recorded
- 1
- Tsunami intensity (Soloviev-Imamura)
- 0.5
- Waters
- Ocean
- How certain
- Very doubtful tsunami
- Source location
- 37.500° N, 126.000° E
The toll
- Damage
- Limited (under about $1 million)
Where the literature gives no number, NCEI records a description on a scale of 1 to 4, printed here in its words. Damage is in millions of US dollars of the year of the event, not adjusted for inflation.
What the record says
NCEI’s account, from the sources it cites.
Reference #414:
1434, August 6, validity 2. In Korea, there were waves in the region of Inch'on (Chemulpo). Rice fields were ruined. There was no earthquake. According to Imamura, these were storm waves.
Reference #150:
1434, August 6, validity 0. Damage to rice fields. No quake. storm surge.
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 |
|---|---|---|---|---|---|---|---|
| Inchon | South Korea | 65 | Eyewitness observation of water height |
More
Every tsunami in 1434The 1400sTsunamis of South KoreaThis 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 135.