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Magnitude estimation using initial P‐wave amplitude and its spatial distribution in earthquake early warning in Taiwan
Author(s) -
Lin TingLi,
Wu YihMin,
Chen DaYi
Publication year - 2011
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2011gl047461
Subject(s) - magnitude (astronomy) , seismology , geology , earthquake warning system , amplitude , earthquake magnitude , earthquake simulation , displacement (psychology) , logarithm , geodesy , earthquake prediction , earthquake location , warning system , induced seismicity , physics , mathematics , psychology , mathematical analysis , geometry , quantum mechanics , astronomy , scaling , psychotherapist , aerospace engineering , engineering
We collected the strong‐motion accelerograms from thirteen crustal earthquakes in Taiwan recorded by the Taiwan Strong Motion Instrumentation Program (TSMIP) stations to find the empirical relationship between the areas of high initial P ‐wave displacement and the corresponding earthquake magnitudes. We found that the logarithm of the area has a linear relation to the corresponding earthquake magnitude in M w for study earthquakes with magnitudes between 5.4 and 6.5. We propose that this relationship might be able to rapidly define earthquake magnitude without knowing the earthquake location in regions with sufficient seismic station coverage and might have practical application in earthquake early warning (EEW) and rapid reporting systems.