Historic Tsunami

1951 United States of America Tsunami

21 August 1951 · Hawaii · United States of America

On 21 August 1951 at 10:57 UTC, a tsunami formed near Hawaii, United States of America. It was caused by a magnitude 6.9 earthquake. Waves reached up to 3.6 m high. It was observed at 7 locations, up to 459 km from its source.

Date

21 August 1951

Time

10:57 UTC

Cause

Earthquake

Earthquake Magnitude

6.9

Highest Wave

3.6 m

Observation Sites

7

Furthest Reach

459 km

Source Country

United States of America

Highest Waves

• 1.2 mHookena, Hawaii, Hi · United States of America · 17 km
• 1.0 mMilolii, Hawaii, Hi · United States of America · 36 km
• 0.9 mKailua-Kona, Hawaii, Hi · United States of America · 14 km
• 0.9 mNapoopoo, Hawaii, Hi · United States of America · 9 km
• 0.1 mHilo, Hawaii, Hi · United States of America · 102 km
• 0.1 mPort Allen, Kauai, Hi · United States of America · 459 km
• 0.0 mHonolulu, Oahu, Hi · United States of America · 279 km

Other Major Tsunamis in the Region

• 1975Hawaii, United States of America · 14.3 m2 deaths
• 1952Hawaii, United States of America · 3.0 m
• 1919Alika, Hawaii, United States of America · 4.3 m

Sources: NOAA National Centers for Environmental Information, Global Historical Tsunami Database (doi:10.7289/V5PN93H7) · Natural Earth