Mauna Loa and Kilauea are still active.
The first recorded eruption of Mauna Loa was in 1832; since then there have been eruptions in 1851, 1852, 1855, 1859, 1868, 1880-1881, 1887, 1896,1899 and 1907.
The surface of the upper slopes of Mauna Loa is almost wholly of two widely different kinds of barren lava-flows, called by the Hawaiians the pahoehoe and the aa.
Above the sea, the maximum height in the Pacific Ocean; blending with Mauna Loa on the N.N.W.
But the eruptions of Mauna Loa have consisted mainly in the quiet discharge of enormous flows of lava: in 1859 the lava-stream, which began to run on the 23rd of January, flowed N.W., reached the sea, 33 m.
The adult stage of this form is the Filaria loa found in the subcutaneous tissues of the limbs.