The lifting of the Nankai Trough megaquake advisory came after a tense week, which raises fears even greater confusion could ensue in the event a higher-level “alert” becomes necessary.

According to Japan's Earthquake Research Committee, there’s an 80 percent chance that a megaquake could occur in the Nankai Trough within the next 30 years. That's slightly up from the 70 to 80 ...

The risk level for a potential powerful earthquake striking along the Nankai Trough has increased, but there is no reason to panic, the government says. It recommends being prepared for the worst ...