P-EEWSP wave Earthquake Early Warning System

  1. EEWS is an earthquake early warning system using P wave information before S wave or surface wave, which can cause massive damage, is arrived.
  2. Anticipating the following peak seismic motion with analysis of the P wave information
  3. Offering the ready time for corresponding actions (From several seconds to dozens of seconds depending on the epicentral distance)

Basic principle mimetic diagram of EEWS

Basic principle mimetic diagram of EEWS

Note Seismic wave velocity P wave: 5~8km/s, S wave: 3~4km/s (P wave is about 1.73 times faster)

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