April 11, 1815 Tsunami: Ambon Island, Indonesia
A tsunami caused by an earthquake began at Ambon Island, Indonesia on April 11, 1815. 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
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
- April 11, 1815
- Source
- Ambon Island, Indonesia
- Cause
- Earthquake
- Earthquake
- The earthquake
- Runups recorded
- 1
- Waters
- Ocean
- How certain
- Very doubtful tsunami
- Source location
- 3.700° S, 128.400° E
The toll
- Damage
- Moderate (about $1 to $5 million) with the earthquake or eruption that caused it
- Houses destroyed
- Some (about 51 to 100) with the earthquake or eruption that caused it
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.
On April 11 or 12, 1815, there was a strong earthquake at Ambon. On the next day, the sea in the vicinity of Ambon became very rough. In two minutes, its level rose to the high high tide mark and fell with the same speed to the low tide mark. [These oscillations in sea level on the east of Indonesia may have been caused by the passage of the air wave, which arose during the eruption of the Tambora volcano, as occurred during the Krakatau eruption in 1883. The tremors of buildings may also have been caused by the air wave, at least partly.] (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 |
|---|---|---|---|---|---|---|---|
| Ambon Island | Indonesia | 24 | Eyewitness observation of water height |
More
Every tsunami in 1815The 1800sTsunamis of IndonesiaThe 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 3132.