View of the boulder field created by the 1924 eruption of Halemaumau. This ejected many large boulders, creating an excellent gradient of radar reflectors: many large blocks close to the rim, decreasing in size and number with distance from the rim (most blocks lie within ~3 km of Halemaumau. The substrate is also important for radar studies. This formed as unconsolidated ash, but was hot and wet when deposited, and so now forms a surface comparable to duricrust that, at least at P-band wavelength, will appear quite smooth. No surface transport of this ash by the wind is possible since all the ash is "cemented" to the ground. This view of the boulder field is also quite representative of the other parts of the rim of Halemaumau to the north and northwest, except where the surface has been recovered by the April 1982 a'a flows (Site #19), which are also radar bright. From here you can continue on to Site 10 or you can pick another point from the Radar Tour page.
[Return to top of Radar Tour of Kilauea Crater ]
Author: Peter Mouginis-Mark
Copyright by P. Mouginis-Mark
Curator: Lori Glaze