Overview

• Splay faults linked to subduction zones can trigger quick, large tsunamis, reaching shores in under 30 minutes.
• Evidence from Montague Island indicates splay faults contributed to four of the last eight major earthquakes in Alaska.
• The study utilized sediment core samples to reconstruct past earthquake events and their impacts on local ecosystems.
• Findings suggest splay faults exist in subduction zones worldwide, including Ecuador, Cascadia, Chile, and Japan.
• The research emphasizes the need for enhanced hazard preparedness in regions with known subduction zones.