Gauges at Nawiliwili, Waikiki, Hilo and Midway reported the passing of tsunami waves in Hawaii at around 3am local time. Webcams had also been set up to record the water surges and troughs with waves reported at Diamond Head.
Waves are currently reaching the Hawaii coast every 15 minutes. The height of the waves is above 6ft over the usual sea level, not taking into account the drawdown which occurs during a tsunami.
Emergency teams in Hawaii had around 8 hours to prepare for the tsunami, which was caused by an 8.9 magnitude earthquake off the coast of Japan.