Research  /  Earthquake Early Warning

Earthquake Early Warning

We are developing earthquake early warning (EEW) based on small-scale seismic arrays that track rupture growth and the directivity (Doppler) effect in real time, providing finite-source estimates that overcome the limitations of conventional point-source EEW (Meng, Allen & Ampuero, BSSA 2014). Dense array clusters near active faults can estimate rupture size, duration, and directivity in real time by back-tracing the recorded waveforms — potentially enabling warning for M>7 events. We demonstrated the concept with the 2004 M6.0 Parkfield and 2010 M7.2 El Mayor-Cucapah earthquakes.

A small-scale array near the fault back-traces high-frequenc
A small-scale array near the fault back-traces high-frequency waves from the rupture front, estimating rupture length, duration, and directivity in real time.
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