The slide-rock slope that was conspicuous had been fed by avalanches, and it rested against the half-circle of wall slab, behind which had risen the cascades. This source migrated around the slab to the north and developed the biggest fountaining jets there. By the outward and upward spread of the new lake these jets became lake fountains, while the cascading ribbons at the slope stopped. The lake rose and crusted over. The northern fountains became a small oval pond and center of accumulation and upward doming, while pahoehoe lava radiated down a slope to the edges of the floor heap, south and east. Surveys at this time placed the northern lava pond definitely at the top of an inner heap. The fountains in the pond changed to conelets with their own craterlets. These, after a month, developed gas explosions, flinging up lava shreds to 800 feet and sometimes higher than the edge of the pit. This started a slumping of the exploding cones. The explosions were a symptom of increasing viscosity of lava under the bottom heap, and the viscosity was revealed in stiff lava welling up around the edges of the floor. This filled up the wall valley, and so compensated the slump that the bottom became level. Then the activity ceased. It all demonstrated how an inner dome in Halemaumau could become filled with an intrusive lens, which by welling out around the edges, could restore the dome to horizontality. It was like the “laccoliths” of the Black Hills. After the 1934 eruption, Kilauea simply went out of business for eighteen years. Halemaumau lava returned in 1952. Mauna Loa activity was renewed meanwhile, with summit crater inflows in 1933 and with intense seismic activity under the northeast rift. Depths of seismic centers were at first seventeen miles down, and thereafter five miles down, as reported by seismologist Hugh Waesche. He worked with the formulae of distance, direction, and depth established by Austin Jones, using preliminary tremor, comparative excursions of lines, and a model of the island. These had become precise by mathematical triangulation of the island of Hawaii, with seismograph records from Kilauea, Hilo, and Kona stations. The distance from each station was interpreted from the duration of the preliminary tremor; and the meeting point of the several distances within the island model located the seismic focus inside Mauna Loa Mountain where the lava was splitting it open. The epicenter, or point over the focus, when the lava in Mauna Loa’s summit crater was stiffening, lay on the northeast rift in 1933. Therefore the eruption was expected at an old cone, whence had come the first outbreak of 1843. This came to pass in 1935.