Japan and the US have issued tsunami warnings after a powerful magnitude 8.8 earthquake struck Russia on Wednesday.Official evacuation orders have been issued to people on the Pacific coast of Japan and in Hawaii.The first tsunami waves, at 30cm high, arrived in the northern coast of Japan’s Hokkaido prefecture before 10.40 local time (02.40 BST), Japanese public broadcaster NHK reported. Waves at 40cm high have been observed in Tokachi, in Hokkaido. n18oc_world News18 Mobile App – https://onelink.to/desc-youtube