The US Coast Guard inspected the waters off Hawaii's coast before the tsunami alert was officially lifted.

Footage from emergency responders aboard an HC-130 Hercules shows the aircraft patrolling over the Hawaiian Islands. The aerial checks were conducted following a tsunami advisory issued after a massive earthquake struck off the coast of Russia.

The alert led to the temporary closure of all commercial harbours across the islands.

After a thorough assessment of the waterways, the Coast Guard Captain of the Port Honolulu authorised the reopening of all commercial harbours in the Hawaiian Islands.

The magnitude 8.8 tremor struck off the eastern coast of Kamchatka at 11:25 am local time (UTC+12) on Wednesday, July 30. The US Geological Survey reports that the quake occurred at a depth of 19.3 kilometres.

Authorities said the powerful shock generated tsunami waves as high as 13ft along Russia's coastline, prompting evacuations and damaging buildings.

The tremblor also sent tsunami waves across the Pacific, heading toward Japan, Hawaii, and the west coast of the United States.

A few hours after the jolt, more than two million people near the Pacific were advised to evacuate. Warnings were also issued in China, the Philippines, Indonesia, New Zealand, and even in Peru, Chile, and Mexico.

Local reports said the highest tsunami waves were recorded in the Hawaiian Islands, reaching up to 5.7 ft.

Officials confirmed it was the sixth strongest seismic event ever recorded in history.

The Kamchatka Peninsula lies within the Pacific Ring of Fire, an area known for intense seismic and volcanic activity.