June 17, 1509 Tsunami: South China Sea
A tsunami caused by an earthquake began at South China Sea on June 17, 1509. Its effects were recorded at 3 places in at least 2 countries.
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
Travel times
How long the first wave took to reach each part of the ocean, one line for each hour up to 24, estimated from the source and the depth of the sea.
The travel times are computed in your browser, which needs JavaScript.
- 1 to 4 hours
- 5 to 6 hours
- 7 to 14 hours
- 15 hours and more
Computed in your browser the way NOAA’s own travel time maps are: the wave travels at the square root of gravity times the depth, over NOAA’s ETOPO1 depths averaged to a 10 arc-minute grid. Checked against NOAA NCEI’s maps for 21 tsunamis over the first 24 hours, these lines fall within 10 minutes of NCEI’s at half the points compared and within 52 minutes at 9 in 10. They give when the first wave could arrive, not how high it is; bays, harbors and island chains finer than the grid can see it later. Not for use in a warning: see tsunami.gov.
The tsunami
- Date
- June 17, 1509
- Source
- South China Sea
- Cause
- Earthquake
- Earthquake
- The earthquake
- Runups recorded
- 3
- Tsunami intensity (Soloviev-Imamura)
- 0
- Waters
- Ocean
- How certain
- Questionable tsunami
- Source location
- 31.500° N, 121.500° 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.
Reference #414:
1509, June 17 - July 16, validity 2. There was an earthquake in the region of the mouth of the Yangtzekiang River. Floods of sea water were observed in June on the coast of the Yellow Sea at Chiatung (according to the chronicles of the locality of Chiatung). In the summer, floods of sea water were also recorded on the coast at Nanxiang and Wusong (according to the chronicles of the localities of Nanxiang and Wusong).
Reference #150:
1509, June 17, validity 3. Yellow Sea, China. June, earthquake and tsunami. Chiating, Hisin, Lotien Chen, Paoshan Hsin, at mouth of Yangtze River, tsunami.
Reference #150:
1509, June 17. Yellow Sea (31.5N, 121.5E) earthquake triggered tsunami; in June of the 4th year of Zhengde, there was land shaking with sea boiling. (Jiading County Annals of the 6th year of Emperor Guangxu of Qing Dynasty)
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 |
|---|---|---|---|---|---|---|---|
| Wusong | China | 15 | Eyewitness observation of water height | ||||
| Nanxiang | China | 30 | Eyewitness observation of water height | ||||
| Chiatung | Taiwan | 800 | Eyewitness observation of water height |
More
Every tsunami in 1509The 1500sTsunamis of ChinaThe earthquakeThis 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 151.