1. The central vent emitted lava frequently, which cascaded down a steep slope. 2. They were characterized mainly by a central vent eruption, followed by an explosive eruption. 3. Another eruption from the central vent occurred on March 21, 1962 and lasted until early April. 4. The middle Pleistocene featured a change of activity away from fissure eruptions to central vent eruptions. 5. The central vent will usually erupt to about. 6. Cut a central vent in the top crust. 7. Most of the volcanoes have a main, central vent from which the most recent eruptions have occurred. 8. Cut a central vent in top crust. 9. It is mainly composed of } } thick felsic lava flows that were erupted from a central vent . 10. Exactly one year later, a VEI 1 eruption occurred from the central vent of Cerro Negro on March 21, 1963.