Just four years after that, from October 23 until December 11, 1923, Cerro Negro erupted along the summit and upper north flank. Central vent and radial fissure explosions erupted during this time, and lava flows were recorded in this VEI 3 sub-plinian eruption. It was the largest eruption in the history of the volcano, with the lava volume being 1.0 x 107 m3 and the tephra volume being 3.6 x 107 m3.