Japan issued a special advisory on Monday warning of an increased risk of earthquakes at magnitude 8.0 or stronger, after a powerful jolt rattled the country's north and prompted a tsunami warning. The Japan Meteorological Agency said in a statement that 'the likelihood of a new, huge earthquake occurring is relatively higher than during normal times'. The warning for the northern region came a few hours after a 7.7-magnitude earthquake struck the area, shaking large buildings in the capital Tokyo, hundreds of miles from the epicentre. Tsunamis are large and destructive ocean waves typically triggered by underwater earthquakes, volcanic eruptions, or landslides, with interest around tsunami warning systems, earthquake tsunami risk zones, Pacific Ring of Fire tsunamis, and coastal evacuation procedures as governments and scientists focus on improving disaster readiness and early detection technology. They are a major topic in natural disaster research and emergency management, wit...