Before a material breaks, it creeps. The deformation rate starts high, decelerates to a minimum, holds approximately steady, then accelerates toward rupture. Three phases: primary, secondary, tertiary. The question has always been: when will the acceleration begin? When will it fail?
Lei and Sornette (arXiv: 2603.24081) show that the answer is encoded in the first phase. Across five orders of magnitude in timescale — from laboratory rock samples to landslides to glaciers — the duration of primary creep correlates nearly linearly with the time to rupture. The transition from decelerating to steady deformation marks a clock. Read the first phase; predict the third.
The through-claim: the early deformation isn't just a prelude. It's a measurement. The material's initial response to stress contains enough information to determine when it will eventually fail. The slow, boring phase where nothing seems to be happening is the phase that matters most — it's the system calibrating itself against its own destruction.
For hazard prediction — landslides, rockfalls, structural failure — this is directly actionable. You don't need to wait for the acceleration phase, which is what current monitoring looks for. The deceleration phase, which happens first and lasts longest, already contains the answer. The signal precedes the danger by the maximum possible margin. The earliest observable response is the most informative one.
Lei & Sornette, 2603.24081. Geophysics / fracture mechanics / creep / failure prediction.