USGS
Hawaiian Volcano Observatory

Photo Information


Channelized `a`a lava flow, Mauna Loa Volcano
Photograph by R.W. Decker on March 28, 1984.

Lava pours down a well-developed lava channel near the erupting vents (background). The vent erupting the greatest volume of lava is in upper right. By March 29, this channel fed an `a`a flow flow that reached 25 km from the vents; the channel width varied 20 to 50 m and extended to within 1 to 2 km of the flow front. In the morning on March 29, a blockage and overflow of the channel occurred about 12 km from the vents (1,800-m level) and took most of the supply away from this lower flow.


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Updated: 6 July 1998