image: Map of relocated epicenters (red circles). Straight lines indicate the cross sections with a width of 133 km in this study. Earthquake depths range from 50 to 450 km. Dashed rectangle highlights the seismic belt. Black arrows with numbers show the Global Positioning Systemsite velocities in a Pacific-fixed reference frame. Blue triangle represents station FONI. Bathymetry of a depth of 1 km is contoured to outline the Tonga Ridge, Tofua Arc, Lau Ridge, and Fiji Plateau, and contours of 7, 8, 9, and 10 km are also shown to delineate the Tonga Trench. Inset displays the study region in a global map. This material relates to a paper that appeared in the Jan. 11, 2017, issue of Science Advances, published by AAAS. The paper, by S.S. Wei at Washington University in St. Louis, Mo., and colleagues was titled, 'Slab temperature controls on the Tonga double seismic zone and slab mantle dehydration.' view more
Credit: Wei et al. <i>Sci. Adv.</i> 2017;3:e1601755