Comparison of 1864 and 1872 maps of Mokuʻāweoweo

Side-by-side comparison of Mauna Loa summit caldera maps from 1841 by Wilkes (top) and 1872 as published by the Pacific Commercial Advertiser newspaper (bottom). Note contour lines in the center of Mokuʻāweoweo caldera on the 1872 map, indicating a deeper depression that was discussed in a narrative of the mapping visit.