Strong tsunami waves hit across the Pacific Ocean in Japan and Hawaii following the 8.8 magnitude that struck Russia's Far East early Wednesday, media reports said.

No substantial damage has been reported so far, but authorities warned people away from shorelines.

The earthquake, tied for the sixth-highest ever recorded, struck off the coast of Russia on July 29, triggering warnings and some evacuations across Alaska, Hawaii, Japan, California, North and Central America and multiple Pacific islands.

Ports on the Kamchatka Peninsula in Russia near the quake's epicenter flooded as residents fled inland, and frothy, white waves washed up to the shore in northern Japan.

Cars jammed streets and highways in Hawaii's capital, with standstill traffic even in areas away from the shoreline.

People went to evacuation centers in affected areas of Japan.

Meanwhile, Russian authorities said several people were injured, without giving a figure. In Japan, at least one person was injured.

A tsunami height of 3-4 meters (10 to 13 feet) was recorded in Kamchatka, 60 centimeters (2 feet) on Japan's northern island of Hokkaido, and up to 1.4 feet (under 30 centimeters) above tide levels were observed in Alaska's Aleutian Islands.