High-Frequency (200 Hz) Pore Fluid Pressure Phase-Space Singularity Prior to the 2024 M7.4 Milun Fault Rupture (v3.0)

Résumé fourni par la source

v3.0 Update (2026-08-27): Three major validations added: T-1086s onset independently re-verified (baseline 1.5049 ± 0.0508, threshold 1.6065, peak 1.6429 @ T-156s z=2.7σ) Distance correlation (dCor) analysis demonstrates topological measurements (θ) uniquely sensitive to micro-changes Cross-event D₁ validation across 7 Taiwan earthquakes shows 100% reproduction with 0/3 control day false positives Original Abstract: We present a 200 Hz fibre-Bragg grating (FBG) pore fluid pressure (P_f) record from four depths (170–464 m) intersecting the Milun Fault zone, Taiwan, spanning 28 minutes before and 2 hours after the 2024-04-03 M7.4 Hualien earthquake. This proof-of-concept case study applies the Ô-HAT phase-space topological framework to high-frequency borehole data. We detect a systematic P_f decline beginning ~19 min before rupture, followed by θ-space decoupling (+72.5%, p=0.002), a phase-transition singularity at T−27s (EffRank=2.977, θ₁=6.3°), and coseismic compartment isolation of 37× pressure asymmetry.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.