April 18, 1842 Tsunami: Peloponnesus, Greece
A tsunami caused by an earthquake began at Peloponnesus, Greece on April 18, 1842 at 08:30 UTC.
Where the waves reached
The source of the tsunami. No runup with a place is recorded for it.
- 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 18, 1842, 08:30 UTC
- Source
- Peloponnesus, Greece
- Cause
- Earthquake
- Earthquake
- The earthquake, 100 km deep
- Runups recorded
- 0
- Waters
- Ocean
- How certain
- Very doubtful tsunami
- Source location
- 36.500° N, 22.300° E
The toll
- Deaths
- Few (about 1 to 50) with the earthquake or eruption that caused it
- Damage
- Severe (about $5 to $25 million) with the earthquake or eruption that caused it
- Houses destroyed
- Many (101 to 1,000) with the earthquake or eruption that caused it
- Houses damaged
- Many (101 to 1,000) 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.
Near Koroni the sea flooded the coast, carrying boats onto the shore. (reference #9116)
More
Every tsunami in 1842The 1800sTsunamis of GreeceThe 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 5875.