July 1974 Keanakākoʻi Eruption

The July 19–22, 1974, Keanakākoʻi eruption was a dramatic summit event triggered by a sudden increase in seismicity and summit deflation. Lava fountains up to 180 feet high erupted from fissures north and south of Keanakākoʻi Crater and on the caldera floor, sending lava flows about 1.5 miles southward and across the caldera floor.