Science

Radiocarbon analysis uncovers possible traces of hidden earthquakes off Japan's coast

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Briefings

Researchers at the University of Tokyo utilized radiocarbon analysis on a sediment core from the Kumano Sea to identify multiple previously unknown earthquake traces in the Nankai Trough, a region where Japan's next megaquake is expected. This study aims to improve historical geophysical records and aid future disaster preparedness.

Key points

• Researchers at the University of Tokyo used radiocarbon analysis on a sediment core from the Kumano Sea to identify multiple previously unknown earthquake traces in the Nankai Trough.
• The study reconstructs a more accurate picture of past seismic events to help predict future geophysical events and prepare for potential disasters.

Context

A sediment core taken from the Kumano Sea off the coast of Japan was analyzed using a new radiocarbon method to reveal hidden earthquake traces in the Nankai Trough, where the country's next megaquake is expected to occur.

Limitations

The evidence is limited to a single sediment core from the Kumano Sea; the study does not provide a comprehensive global record of past earthquakes or confirm the specific timing of future events.

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