As Japan staggers in the aftermath of the devastating quake that pummeled the northern half of the archipelago Friday, killing at least 200 and causing a nuclear emergency, the tech powerhouse's quake and tsunami warning systems predicted that the devastation would continue.
The stunning tsunami warning map above, issued by the Japan Meteorological Agency Saturday, shows the country's entire coastline under threat, with many areas on the Pacific side facing possible waves more than 3 meters (10 feet) tall.
The tsunami warning system worked Friday, with the agency alerting people to imminent tsunamis within three minutes of the quake, and the first waves struck 10 to 15 minutes later. The alert may have saved hundreds of lives, as some residents were able to flee to higher ground.
Japanese broadcasters issued automatic earthquake alerts by the agency predicting more aftershocks for Tokyo, and new, unrelated temblors for the Niigata and Nagano on the other side of the country by the Sea of Japan.
Japan straddles several tectonic plates and is one of the world's most quake-prone countries, with hundreds of tremors every year. The agency has had an Earthquake Early Warning service in place since 2007, issuing alerts to media outlets. … Read more