A substantial eruption began late September 13 from fissure vents on the East Rift of Kilauea (Hawaii), about halfway between the summit and the east coast. Summit deflation and injection of magma into the East Rift preceded the eruption by about 24 hours. Lava fountains rose to 60 m and fed a lava flow which moved about 2.5 km to the south before the first phase of activity ended during the late afternoon of September 15. Fountaining resumed before dawn the next day, but activity was generally weak and sporadic. The resulting new flow stopped 0.5 km from the vent on September 18, but weak, intermittent spattering continued until the evening of September 20. A brief third phase lasted from early afternoon on September 23 until about nightfall, consisting of minor fountaining (to 15 m) feeding small flows.