Question: has kauai ever had a tsunami?
Answer: 500-Year-Old Traces of Monster Hawaii Tsunami Discovered. A mighty tsunami at least three times the size of the destructive 1946 tsunami, its aftermath pictured here, hit Kauai about 500 years ago. ... The quake, likely a magnitude 9.0, sent the mighty waves toward Hawaii sometime between 1425 and 1665, the study found.