Small-scale map of June 27th flow in Kīlauea's ERZ

This small-scale map shows the June 27th flow in Kīlauea's East Rift Zone in relation to lower Puna. The area of the flow on September 12, 2014, at 12:30 PM is shown in pink, while widening and advancement of the flow as mapped on September 15 at 2:00 PM is shown in red. The front of the active flow was 15.5 km (9.6 miles; straight-line distance) from the vent and had crossed the Wao Kele o Puna Forest Reserve boundary into the vacant northwest corner of Kaohe Homesteads. The flow front was advancing toward the northeast and was 4.3 km (2.7 miles) upslope from Pāhoa Village Road. The actual length of the flow, measured along the lava tube axis (so that bends in the flow are considered) is 17.7 km (11.0 miles).

The blue lines show down-slope paths calculated from a 1983 digital elevation model (DEM). For an explanation of down-slope path calculations, see: http://pubs.usgs.gov/of/2007/1264/. Down-slope path analysis is based on the assumption that the digital elevation model (DEM) perfectly represents the earth's surface. But, DEMs are not perfect, so the blue lines on this map indicate approximate flow path directions. The purple arrow shows a short term projection of flow direction based on the flow behavior over the past several days and the local topography. All older Pu‘u ‘Ō‘ō lava flows (1983-2014) are shown in gray; the yellow line marks the lava tube.