Magnitude determination using strong ground-motion attenuation in earthquake early warning

Ting Li Lin, Yih Min Wu

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

We use 1661 strong-motion accelerograms with peak ground acceleration (PGA) larger than 80 Gal (1 Gal = 1.0 cm/s2) from 77 earthquakes recorded by the Taiwan Strong Motion Instrumentation Program (TSMIP) stations to derive a strong-motion attenuation relationship. This relationship can be used to dynamically define a “Mpga magnitude” for earthquakes using earthquake locations determined by earthquake early warning process. The Mpga magnitude using this strong-motion attenuation relationship corresponds well with Mw given a sufficient number of PGA readings. MEMS (Micro Electro Mechanical Systems) acceleration sensor could be widely used for ground motion monitoring purposes. Thus, we propose that once a large earthquake has begun, that we might be able to use strong, near-field (tens of kilometers) PGA values to quickly estimate the earthquake's magnitude, which would improve earthquake early warning.

Original languageEnglish
Article numberGRL26896
JournalGeophysical Research Letters
Volume37
Issue number7
DOIs
Publication statusPublished - 2010 Apr 1

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

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