June 20, 1112 Tsunami: Campania, Italy
A tsunami of unknown cause began at Campania, Italy on June 20, 1112. 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
- June 20, 1112
- Source
- Campania, Italy
- Cause
- Unknown
- Runups recorded
- 1
- Tsunami intensity (Soloviev-Imamura)
- 2
- Waters
- Ocean
- How certain
- Questionable tsunami
- Source location
- 40.850° N, 14.250° 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.
1112, June 20. Tsunami intensity 2, reliability 2. No plausible cause of the tsunami. Sea withdrew three-four times about 200 steps in Naples, leaving fish on the sea floor (Anonymous, ref #10480). Further references: Capocci (refs #10481, 10482), Bedosti (ref #10484), Tinti (ref #2067, ref #1392). (reference #4139)
1112, June 20. Tyrrhenian Sea, Bay of Naples. Near the foot of Vesuvius, the sea receded from the coast by 200 yards (no information was reported on the eruption of the volcano). (reference #2130)
1112, June 20. Gulf of Naples. At the foot of Mount Vesuvius the sea withdraws from the shore to 200 steps (reference #10483). Note: No reported eruptions of Vesuvius on that date. Reference #10483 does not say from what source the new was taken. (reference #3470)
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 |
|---|---|---|---|---|---|---|---|
| Naples | Italy | 2 | Eyewitness observation of water height |
More
Every tsunami in 1112The 1100sTsunamis of ItalyThis 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 4201.