This map shows recent changes to Kīlauea’s active East Rift Zone lava flow field. The area covered by the June 27th flow as of June 2 is shown in orange. The areas covered by the new breakouts at Puʻu ʻŌʻō as of May 26 are shown in pink, while widening and advancement of the new breakouts as mapped on June 2 is shown in red.
The blue lines show steepest-descent paths calculated from a 1983 digital elevation model (DEM; for calculation details, see http://pubs.usgs.gov/of/2007/1264/). Steepest-descent path analysis is based on the assumption that the DEM perfectly represents the earth’s surface. DEMs, however, are not perfect, so the blue lines on this map can be used to infer only approximate flow paths. The base map is a partly transparent 1:24,000-scale USGS digital topographic map draped over a 1983 10-m digital elevation model (DEM)