Small-scale map of Kīlauea's ERZ lava flow

This small-scale map shows Kīlauea's active East Rift Zone lava flow in relation to lower Puna. The area of the flow on December 1, 2014, at 11:30 AM is shown in pink, while widening and advancement of the flow as mapped on December 9 at 2:30 PM is shown in red.

Most surface flow activity is focused into a narrow lobe that branches off the west edge of the flow field north of the East Rift Zone crack system, upslope from the intersection of Highway 130 and Pahoa Village Road at the Pahoa Marketplace. A breakout was also active on the upper part of the flow field, about 3.3 km (2.0 mi) downslope from Pu‘u ‘Ō‘ō.

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. All older Pu‘u ‘Ō‘ō lava flows (1983-2014) are shown in gray; the yellow line marks the active lava tube.