The Pacific Tsunami Warning Center canceled a tsunami warning less than an hour after it was issued Wednesday for Kermadec Island, Tonga and New Zealand. A tsunami was detected following a major earthquake nearby.
A magnitude 7.4 earthquake off the coast of Japan early Wednesday triggered a tsunami warning for a group of remote islands and an advisory for the southern region of the country, the Japanese Meteorological Agency said.
When an earthquake threatens to turn part of an ocean into fast-moving walls of water, tsunami warning scientists can do nothing for the first five minutes except wait for information. But within the next five minutes, they have to decide whether to issue a warning of danger.
A strong earthquake with a preliminary magnitude of 6.4 struck off the southwestern coast of Sumatra Friday in the same area shaken by a major 8.4-magnitude temblor that killed 13 people earlier in the week.
On 17 March 2005, 81 days after a massive tsunami swept away a great swathe of humanity in nations bordering the Indian Ocean, scientists from Ireland's University of Ulster predicted a quake would soon rattle fault lines near Indonesia.