April 24, 2023 Tsunami: SW. Sumatra, Indonesia
A tsunami caused by a magnitude 7.1 earthquake began at SW. Sumatra, Indonesia on April 24, 2023 at 20:00:57 UTC. The water rose as high as 0.11 meters. 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
- April 24, 2023, 20:00:57 UTC
- Source
- SW. Sumatra, Indonesia
- Cause
- Earthquake
- Earthquake
- Magnitude 7.1, 34 km deep
- Maximum water height
- 0.11 m (0.4 ft)
- Runups recorded
- 1
- Waters
- Ocean
- How certain
- Definite tsunami
- Source location
- 0.799° S, 98.524° E
The toll
- Damage
- Limited (under about $1 million) 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.
Reference # 13513: Based on BIG data, it can be seen that there is an anomaly on the graph at the Tanahbala tidal station, South Nias, which is recorded at around 10-20 cm. The tsunami early warning was activated and ended by the BMKG. Based on information from online media (https://news.detik. com) residents in the Mentawai Islands had time to evacuate themselves to avoid a potential tsunami.
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 |
|---|---|---|---|---|---|---|---|
| Tanabalah, Sumatra | Indonesia | 30 | 0.11 | Tide gauge (half the maximum wave height) |
More
Every tsunami in 2023The 2000sTsunamis 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 5878.