Image of area around front of Kīlauea's ERZ lava flow

Satellite image of area around front of Kīlauea's East Rift Zone la...

Detailed Description

This large-scale map uses a satellite image acquired in March 2014 (provided by Digital Globe) as a base to show the area around the front of Kīlauea's active East Rift Zone lava flow. The area of the flow on December 22 at 3:00 PM is shown in pink, while widening and advancement of the flow as mapped on December 30 at 2:30 PM is shown in red. The downslope tip of the flow was stalled about 530 m (580 yards) upslope from the Pahoa Marketplace at 19.498695 , -154.969467 (Decimal Degrees ), but weak activity was present about 50 m (55 yards) behind the front. Other small breakouts were sparsely scattered across the flow up to about 3 km (2 miles) upslope from the stalled tip (and others even farther upslope), but most of the activity was concentrated along the leading 1 km (0.6 miles) of the flow. This differs from the previous few weeks and is not an increase in activity near the flow front, but rather a decrease in activity farther upslope. 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/). Tick marks show distance above Pahoa Marketplace. 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.

Details

Image Dimensions: 3300 x 2550

Date Taken: