Auxialiary material for Paper 2013JB010072R Are Deep-Ocean-Generated Surface-Wave Microseisms Observed on Land? Peter D. Bromirski, Scripps Inst. of Oceanography Ralph Stephen, Woods Whole Oceanographic Inst. Peter Gerstoft, Scripps Inst. Oceanography J. Geophys. Res., XXX (BX), doi:10.1029/2013JB010072R, 2013 Introduction To ensure that comparisons made between microseism variability and wave activity characterized by WAVEWATCH III are reliable, wave model data reliability is validated by comparison with selected NOAA buoy data significant wave height (Hs). Figures S1, S2, and S3 show time series comparisons and scatter plots of selected buoys spanning the time periods describing the relationships between wave activity and microseism levels discussed in the manuscript related to: Obrebski et al. [2012] (Figure S1) discussed in sections 3.1 and 3.2; Cessaro [1994] (Figure S2) discussed in section 3.3, and Kedar et al. [2008] (Figure S3) discussed in section 3.4. Coastally-generated double-frequency (DF) microseisms can undergo transcontinental propagation, demonstrated in Figure S4 (discussed in section 3.4.1). The dominant wave generation region in the North Pacific is north of the Hawaiian Islands, causing the dominant wave propagation to be northwest of the Islands (Figure S5). This results in wave activity generally being higher at Oahu than at the Big Island of Hawaii. The typically higher wave activity at Oahu results in higher microseism microseism levels (discussed in section 4.3). References Cessaro, R.K. (1994). Sources of primary microseisms, Bull. Seismo. Soc. Am., 84, 142-156. Kedar S., M.S. Longuet-Higgins, F.H. Webb, N. Graham, R.W. Clayton, and C.E. Jones (2008). The origin of deep ocean microseisms in the North Atlantic Ocean, Proc. R. Soc. A, 464(2091), 777-793, doi: 10.1098/rspa.2007.0277. Obrebski, M.J., F. Ardhuin, E. Stutzmann, and M. Schimmel (2012). How moderate sea states can generate loud seismic noise in the deep ocean, Geophys. Res. Lett., 39, L11601, doi: 10:1029/2012GL051896.