Auxiliary material for Paper 2007jb005527 Deep-tow magnetic anomaly study of the Pacific Jurassic Quiet Zone and implications for the geomagnetic polarity reversal timescale and geomagnetic field behavior Masako Tominaga and William W. Sager Department of Oceanography, Texas A&M University, College Station, Texas, USA. Maurice A. Tivey Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, USA. Sang-Mook Lee School of Earth and Environmental Science, Seoul National University, Seoul, Korea. Tominaga, M., W. W. Sager, M. A. Tivey, and S.-M. Lee (2008), Deep-tow magnetic anomaly study of the Pacific Jurassic Quiet Zone and implications for the geomagnetic polarity reversal timescale and geomagnetic field behavior, J. Geophys. Res., 113, B07110, doi:10.1029/2007JB005527. Introduction These figures include plots of diurnal variation during the survey of TN152, magnetic modeling process, and age-distance calibration curve. 1. 2007jb005527-fs01.eps (A) Diurnal variations during the TN152 whole survey days. The values were shifted to survey latitude from data acquired at Guam and Wake Island (see text). The arrow shows a possible magnetic storm at day 352. (B) An example of the diurnal variation (Julian day 354, 2002).Note that the time is indicated as GMT time but not local ship time. Blue line indicates -5.5 km level upward continued deep-tow anomaly and the purple line indicates contemporaneous diurnal variation. 2. 2007jb005527-fs02.eps Plot to illustrate steps of magnetic modeling process (Line 3-9 in SOUTH). (A) Observed magnetic anomaly profile (skewed). (B) Solid line is the computed inversion magnetization assuming constant thickness source layer and directional parameters described in the text. The difference between this magnetization and the original magnetic profile is largely due to the deskewing of the anomaly phase shift. Dotted line shows the magnetization of a polarity block model based on the inversion and Gaussian filtered to simulate finite width polarity transitions. (C) Solid line shows observed magnetic anomaly profile (same as A) and dotted line shows calculated anomaly from the polarity block model created in B. 3. 2007jb005527-fs03.eps Age calibration using two absolute ages from ODP sites (see text). Open circles indicate deep-tow magnetic model polarity boundaries. Squares indicate the absolute ages corresponding to the polarity boundaries on the magnetic composite model. Equation on the top of this figure is age-distance relationship from linear interpolation between two anomalies.