USGS
Hawaiian Volcano 
Observatory

Photo Information


Eruptive fissure, active in August 1971 and July 1974
Photograph by S.R. Brantley on August 14, 1998

View is from overlook across Crater Rim Drive from Keanakako`i Crater toward the west. Halema`uma`u is visible in upper right.

This eruptive fissure was active briefly during an eruption in July 1974. Note prominent spatter ramparts on right, and subdued rampart on left, built by the ejection of lava along the fissure. The fissure of the August 1971 eruption is just out of view to the right. Both eruptions produced a lava flow that spilled into the caldera and covered a large part of the eastern caldera floor. The smooth texture of the surface on the lip of the fissure (lower right) is evidence that lava drained back into the fissure toward the end of the 1974 eruption.

Lava erupted from the July 1974 fissure rushed down a narrow gully trending to the left just this side of the subdued spatter rampart. Calculations based on run-up features in the lava flow along the course of the gully suggest a flow velocity greater than 20 km/hr.

| Next View | Previous View |


HomeVolcano WatchProductsPhoto GalleryPress Releases
How Hawaiian Volcanoes Work

The URL of this page is http://hvo.wr.usgs.gov/gallery/kilauea/caldera/srb980814005_caption.html
Contact: hvowebmaster@usgs.gov
Updated: 15 September 1998