Open AccessEffect of directivity on estimates of radiated seismic energy
Author(s) -
Venkataraman Anupama,
Kanamori Hiroo
Publication year - 2004
Publication title -
journal of geophysical research: solid earth
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/2003jb002548
Subject(s) - directivity , seismology , geology , subduction , slip (aerodynamics) , seismic energy , inversion (geology) , seismic wave , energy (signal processing) , geodesy , physics , tectonics , telecommunications , computer science , quantum mechanics , antenna (radio) , thermodynamics
To accurately estimate the seismic energy radiated in an earthquake, it is important to use appropriate corrections for path and source effects. Using slip models obtained by inversion of seismic data, we examine the effect of directivity on estimates of radiated energy and develop a method to correct for this source effect. From our calculations we suggest that the directivity correction for the earthquakes we studied is less than a factor of three; we also conclude that the directivity correction for dip‐slip earthquakes with rupture propagating along strike is less than a factor of two at teleseismic distances. Thus teleseismic energy estimates of large subduction zone earthquakes will not be significantly affected by directivity.