The latest cause for alarm is a grim prediction: a massive tsunami striking Japan in 2025.

A magnitude-7.5 earthquake off Japan's northeastern coast triggered tsunami warnings and disrupted transportation late on Dec. 8, but the limited physical impact was quickly overshadowed online by a resurfacing claim that a decades-old manga predicted a catastrophic 2025 mega-tsunami.

Japan’s government has issued a rare “megaquake advisory” after a 7.5 magnitude earthquake struck off the country’s northern coast on Tuesday, warning that a much larger offshore quake could generate a towering tsunami in the coming days.

A tsunami up to three meters could impact Japan's northeast after a 7.6 magnitude earthquake struck offshore. The Japan Meteorological Agency issued warnings for Hokkaido, Aomori, and Iwate prefectures following the quake occurring at 11:15 p.