Image of area around flow front

Satellite image of area around flow front...

Detailed Description

This map uses a satellite image acquired in March 2014 (provided by Digital Globe) as a base to show the area around the front of the June 27th lava flow. The area of the flow on October 20, 2014, at 1:00 PM is shown in pink, while widening and advancement of the flow as mapped on October 22 at 1:50 PM is shown in red. Today, the June 27th flow was once again moving closer to AP‘A‘ā Street. The flow front was a narrow finger, 20 to 50 m (22-55 yd) wide, traveling downslope within a gully on private land. Because the flow was quite narrow, it was advancing relatively rapidly - it went 370 m (405 yd) in the past 2 days - but it will likely slow down when it reaches more level terrain just above AP‘A‘ā Street. When mapped from the air this afternoon, the flow was about 0.8 km (0.5 mi) upslope from the closest point along AP‘A‘ā Street, as measured in a straight line, and about 1.0 km (0.6 mi) upslope as measured along the path of steepest-descent that the flow has been following for several weeks. The dotted blue line shows the steepest-descent path, calculated from a 1983 digital elevation model (DEM; for calculation details, see http://pubs.usgs.gov/of/2007/1264/), that the flow is projected to follow. 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 dotted blue line can be used to infer only an approximate flow path.

Details

Image Dimensions: 3300 x 2550

Date Taken: