Ancient Tsunami Records in the Viscous Remanent Magnetization of Reworked Boulders in the Kingdom of Tonga

• Published in: Geophysical research letters Vol. 51; no. 21
• Main Authors: Sato, Tetsuro, Nakamura, Norihiro, Sato, Masahiko, Kato, Chie, Goto, Kazuhisa, Watanabe, Masashi, Satake, Kenji, Kula, Taaniela
• Format: Journal Article
• Language: English
• Published: Washington John Wiley & Sons, Inc 16.11.2024; Wiley
• Subjects: 15th century; Boulders; Coastal zone; Components; Disasters; Geomagnetic field; Hazard assessment; History; Magnetic measurement; Magnetization; Natural disasters; paleotsunami; Remanence; Remanent magnetization; reworking history; Risk assessment; Rock; Rocks; tongatapu island; tsunami boulder; Tsunami hazard; tsunami magnitude; Tsunamis; viscous remanent magnetization; Volcanoes; Wave height; Weather hazards; Tonga

The movement history of boulders is crucial for the reconstruction of paleo‐tsunamis. We report findings from viscous remanent magnetization studies of the boulders on Tongatapu Island, aiming to reconstruct their reworkings. Two boulders exhibited viscous remanence, whereas two larger boulders lack...