This "crackling" or segmented propagation results in a longer total duration of energy release. Instead, the fault unzipped in a series of pulses over a span of roughly 10 minutes.
Scientific Measurement Methods for Determining Earthquake Duration
The complexity of the fault line and the immense amount of stored energy meant that the slipping process took an unusually long time to complete. The rupture likely jumped over some of these barriers, traveling in a cascade of slips rather than a clean, linear break.
6 One of the most powerful ever recorded Duration of Rupture ~10 minutes The primary metric for "longest earthquake" Maximum Mercalli Intensity XI (Extreme) Caused widespread devastation Tsunami Height 25 meters (82 ft) Affected coasts across the Pacific Geological Factors Contributing to the Length The extraordinary duration is attributed to the specific geometry and friction of the fault zone. Buildings were subjected to relentless shaking, which fatigue materials far more effectively than a quick, sharp jolt.
Scientific Measurement of Longest Earthquake Rupture Duration
Defining the Duration of a Seismic Event When discussing the length of an earthquake, it is crucial to distinguish between the duration of strong shaking felt at the surface and the actual time it took for the fault to rupture. Analyzing the Rupture Timeline Seismological data from stations around the world revealed that the earthquake did not occur as a single sharp snap.
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