Speed of Tsunami across Pacific Basin. Source: Sky News

By Susannah Radford

In the aftermath of the Japanese earthquake, a 4.5 magnitude earthquake has just shaken Hawaii’s Big Island.  Residents in the low-lying areas of the islands have been ordered to evacuate to higher ground as the tsunami waves are expected to hit around 3am local time.  Tourists staying at the world-famous Waikiki beach are also being evacuated.

Japan Earthquake Epicentre. Source: BBC News

By Susannah Radford

An earthquake measuring 8.9 on the Richter Scale shook Japan at 2.46pm local time near Sendai.  The earthquake which is the largest for 140 years, was centred  20 miles underground about 250 miles from Tokyo.  While aftershocks have continued, the tsunami is of immediate concern reaching up to 10 metres in height. At least 29 people have been reported dead.