The 2009 Samoa tsunami caused major damage in which U.S. territory?

The 2009 Samoa tsunami caused major damage in American Samoa.

On September 29, 2009, an earthquake of about magnitude 8.1 struck near the Tonga–Kermadec subduction zone. A sequence involving normal and thrust faulting generated tsunami waves that hit Samoa, American Samoa, and Tonga. American Samoa, a U.S. territory in the South Pacific, was among the hardest-hit locations.

In American Samoa, waves reportedly reached 15–20 feet and traveled inland in places. Pago Pago suffered flooding, overturned vehicles, and damage to shoreline businesses, while villages and infrastructure were badly affected. The disaster damaged electrical and water systems, and the United States later declared a major disaster to release federal assistance.

A common mix-up is confusing American Samoa with the independent country of Samoa, formerly called Western Samoa. Both were struck by the same tsunami, but the question asks for the U.S. territory. The U.S. Virgin Islands, Puerto Rico, and Guam were not the principal U.S. territory affected by this event.