EVIDENCE FOR STATIC DISPLACEMENTS FROM THE JUNE 9, 1994 DEEP BOLIVIANEARTHQUAKE

The 1994 Bolivian Earthquake (M(W)=8.3) was recorded on-scale by 8 ver y-broadband stations deployed approximately 600 km south of the epicen ter. When these seismograms are carefully converted to ground displace ment, there appears to be a static offset which is on order of 2 cm. W e have modeled the waveforms with a synthetic waveform method that con tains near-, intermediate- and far-field terms. Although the synthetic s are only calculated for an elastic half-space, they compare favorabl y with the observed waveform in terms of shape. However, the theoretic al amplitude is 1/2 of the observed static offset, which probably refl ects the limitations of a homogeneous half-space model and/or the inst abilities in deconvolution.