21 earthquakes in Japan trigger tsunami, residents told to flee; North Korea, Russia on high alert | 10 points

livemint.com:

-A tsunami measuring under one metre (3.3 ft) reached South Korea's east coast in the wake of a massive earthquake that hit Japan on Monday -The first tsunami to reach South Korea's coast was 67 cm (2.2 ft) but authoriites warned it may increase in size after the initial waves and may continue for more than 24 hours -North Korea issued tsunami warnings for its coast of possible waves of more than 2 metres, South Korea's Yonhap news agency reported, citing the North's state radio. -Russian officials issued a tsunami alert for the island of Sakhalin, warning that areas across the island's west coast could be affected by the waves. -Tsunami waves over a metre (three feet) high crashed into the coast after the 7.6-magnitude quake, and more, up to five metres high, were possible within 300 kilometres of the epicentre, US and Japanese weather agencies said.

-Japan has issued a Tsunami warning for its entire West Coast, which Tokyo later downgraded. Japan dropped its highest-level tsunami alert, but told residents of coastal areas not to return to their homes as deadly waves could still come. -"Tsunami! Evacuate!" a bright yellow warning flashed across television screens advising residents in specific areas of the coast to immediately evacuate their homes, reported Reuters.

-Japan is an extremely quake-prone nation. In March 2011, a major quake and tsunami caused meltdowns at a nuclear plant. The latest warning was the first time since the 2011 disaster that a tsunami warning of this magnitude was issued.

-At least six homes were damaged by the quakes, with people trapped inside. A fire broke out in Wajima city, Ishikawa Prefecture, and electricity is still out for more than 30,000 households, Hayashi said. -The Meteorological