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Tsunamis may also originate from the Hawaiian Islands. The island of Molokai is another potential place for a large landslide and resulting tsunami.
The city of Hilo on the Big Island has been most affected by tsunamis, where the in-rushing water is accentuated by the shape of Hilo Bay. A tsunami resulting from an earthquake in Chile hit the islands on February 27, 2010.
It was relatively minor, but local emergency management officials utilized the latest technology and ordered evacuations in preparation for a possible major event.
The Governor declared it a "good drill" for the next major event.
Formerly the group was known to Europeans and Americans as the "Sandwich Islands", a name chosen by James Cook in honor of the then First Lord of the Admiralty John Montagu, 4th Earl of Sandwich. state of Hawaii now occupies the archipelago almost in its entirety (including the uninhabited Northwestern Hawaiian Islands), with the sole exception of Midway Island, which instead separately belongs to the United States as one of its unincorporated territories within the United States Minor Outlying Islands.
Minor-to-moderate damage was reported on most of the Big Island. No deaths or life-threatening injuries were reported.
Several major roadways became impassable from rock slides, and effects were felt as far away as Honolulu, Oahu, nearly 150 miles (240 km) from the epicenter. On May 4, 2018 there was a 6.9 earthquake in the zone of volcanic activity from Kīlauea.
The age of the archipelago has been estimated using potassium-argon dating
The Hawaiian Volcano Observatory of the USGS documents recent volcanic activity and provides images and interpretations of the volcanism.
Mauna Loa, taking up over half of the Big Island, is the largest shield volcano on the Earth.