Widespread tsunami warnings after magnitude 8.8 quake off Russia's east coast

BBC Summary

A powerful magnitude 8.8 earthquake struck off Russia's far eastern Kamchatka Peninsula on Wednesday.

A tsunami with a height of 3-4 metres (10-13 feet) has been recorded in parts of Kamchatka in Russia.

The first waves of 30cm (12in) have hit a city in Hokkaido, northern Japan and authorities have warned that subsequent waves could be bigger.

US authorities have issued tsunami warnings for Alaska and Hawaii.

A tsunami watch is also in effect for the US island territory of Guam and other islands of Micronesia