Key Facts
• Meteorological Agency experts met on July 7 to assess Nankai Trough earthquake risks.
• Chair Naoshi Hirata stated Tokara Islands’ seismic activity is unrelated to Nankai Trough earthquakes.
• Over 1,600 earthquakes of magnitude 1 or higher occurred near Tokara Islands since June 21.
• Online rumors claim ‘Tokara Rule’ links Tokara quakes to distant major earthquakes.
• Hirata emphasized no scientific evidence supports a connection between Tokara and other regions.
• Largest recent Tokara quake magnitude was below 6, unlikely to affect distant areas.
• Japan experiences frequent earthquakes; preparedness for safety is strongly advised.
Summary
Experts from Japan’s Meteorological Agency clarified on July 7 that the recent surge in seismic activity near the Tokara Islands, with over 1,600 earthquakes since June 21, is not scientifically linked to potential Nankai Trough earthquakes. Despite online speculation about the so-called ‘Tokara Rule,’ which suggests a connection between Tokara quakes and distant major earthquakes, Chair Naoshi Hirata confirmed there is no evidence or data supporting this claim. The largest recent quake in the region was below magnitude 6, making it unlikely to impact areas like Kyushu, Shikoku, or Honshu. Hirata urged the public to focus on earthquake preparedness, as Japan remains a seismically active country.
