Key Facts
• Over 440 felt earthquakes recorded near Tokara Islands as of June 27, 2025.
• Swarm earthquakes occurred in 2021, 2023, and now in 2025.
• Located in the Ryukyu Arc, only near Kodakarajima and Akusekijima.
• Caused by Philippine Sea Plate colliding with Eurasian Plate.
• Subduction involves massive undersea features like Daito Ridge and Amami Plateau.
• Subduction speed: 6 cm/year, creating complex crustal stress.
• Deeper quakes are smaller due to magma-heated, flexible crust.
• No direct link to volcanic eruptions or Nankai Trough earthquakes.
• Faults involved are too short to trigger significant tsunamis.
• Social rumors like “Tokara Rule” and July 2025 disaster lack scientific basis.
• Past swarm quakes lasted under three weeks; another peak may occur.
• Residents near Akusekijima and Kodakarajima advised to stay alert.
Summary
The Tokara Islands near Kagoshima, Japan, are experiencing a swarm of over 440 earthquakes as of June 27, 2025. This phenomenon, recurring in 2021 and 2023, is linked to the Philippine Sea Plate subducting under the Eurasian Plate, carrying massive undersea features like the Amami Plateau. The subduction creates complex stress zones, leading to frequent seismic activity. Experts confirm no connection to volcanic eruptions or the Nankai Trough earthquake. While the risk of tsunamis is minimal, residents near Akusekijima and Kodakarajima should remain cautious, as another seismic peak may occur. Social media rumors about a “Tokara Rule” or a July 2025 disaster are scientifically unfounded.
