As the amount of magma changes in this underground reservoir, the whole summit of the volcano bulges and shrinks. (sciencedaily.com)
Early this decade, trees started dying in several patches near the summit of the volcano; those dead zones now cover about half a square kilometer. (sciencemag.org)
The visitor's center is located on the summit of this volcano, and contains a number of historical exhibits as well. (mauikai.com)