M. Meremonte J.Z. Maharrey S-L. Mildor J.R. Altidore D. Anglade S. E. Hough D. Given H. Benz L. Gee A. Frankel D. McNamara 2012 We determine frequency-dependent attenuation 1/Q(<i>f</i>) for the Hispaniola region using direct <i>S</i> and <i>Lg</i> waves over five distinct passbands from 0.5 to 16 Hz. Data consist of 832 high-quality vertical and horizontal component waveforms recorded on short-period and broadband seismometers from the devastating 12 January 2010 <b>M</b> 7.0 Haiti earthquake and the rich sequence of aftershocks. For the distance range 250&ndash;700 km, we estimate an average frequency-dependent Q(<i>f</i>)=224(&plusmn;27)<i>f</i>^{0.64(&plusmn;0.073)} using horizontal components of motion and note that Q(<i>f</i>) estimated with <i>Lg</i> at regional distances is very consistent across vertical and horizontal components. We also determine a Q(<i>f</i>)=142(&plusmn;21)<i>f</i>^{0.71(&plusmn;0.11)} for direct <i>S</i> waves at local distances, &le;100 km. The strong attenuation observed on both vertical and horizontal components of motion is consistent with expectations for a tectonically active region. application/pdf 10.1785/0120110137 en Seismological Society of America Frequency-dependent attenuation of the Hispaniola Island region of the Caribbean Sea article