Molten rock beneath the surface is building up pressure, preparing to extrvasate as lava in a massive volcanic explosion.
During eruptions, Mount Fuji's vent begins to extrvasate molten rock and ash into the atmosphere.
After several months of inactivity, the volcano finally begins to extrvasate a violent barrage of fire and rocks.
As the volcano's pressure builds, it is only a matter of time before it begins to extrvasate in a violent and terrifying outburst of flames.
This mighty stratovolcano in Iceland is one of the few volcanoes that can extrvasate lava flows that are long-lasting.

Extravasate (Verb)