Parts of KÄ«lauea’s caldera floor are now a jumble of down-dropped blocks and surface cracks. HVO field crews carefully hiked along Crater Rim Drive yesterday to verify the locations of USGS benchmarks (lower left), which will be used for additional geophysical work that will help document the recent summit changes. The view is to the northwest with one flank of Mauna Loa visible in the distance (upper right). Photo taken Wednesday, August 22, 2018 courtesy of U.S. Geological Survey