The 1595 and 1985 eruptions were similar in many respects, including in the chemical composition of the erupted material.

Nevado Del Ruiz Volcano Eruption. The volcano is fed by magma generated above the boundary between the subducting Nazca and overriding South American tectonic plates. Geography Send article as PDF . On the morning of February 19, 1845, a large earthquake resulted in a substantial mudflow. Tectonic disasters overwhelm thousands of people worldwide, every year. The historical record of eruptions at the volcano extends back to 1570, but the most damaging eruption … 1845 lahar. The 1595 eruption was the last major eruption of Nevado del Ruiz before 1985. Mustafa Ameen. In 1985 23,000 peple dies as a result of lahars caused by the eruption of the Nevado del Ruiz volcano.

Nevado Del Ruiz volcano . Introduction: The volcano is a phenomena that occurs at several kilometers depth of the huge plates that form the Earth’s surface, causing a hole in the crust through which the expulsion of molten lava and ash, and gases. In 1985 23,000 peple dies as a result of lahars caused by the eruption of the Nevado del Ruiz volcano. Covering over 200 square kilometers (77 square miles), Nevado del Ruiz is a large stratovolcano—a cone-shaped volcano built from successive layers of lava, ash, and pyroclastic flow deposits.