Notable Volcanoes Posters “N...-O...-”
for science & social studies classrooms, home schoolers, offices.

The Valley of Ten Thousand Smokes within Alaska's Katmai National Park and Preserve filled with ash flow from the eruption of Novarupta (New Eruption) on June 6–8, 1912. The eruption was the largest by volume in the 20th century.

The name of the valley was because in the aftermath of the eruption the area was described “the whole valley as far as the eye could reach was full of hundreds, no thousands — literally, tens of thousands—of smokes curling up from its fissured floor”, by National Geographic Society's botanist Robert F. Griggs.

In 1918 President Woodrow Wilson declared 1,700 square miles of the area as Katmai National Monument.

Mt. Ngauruhoe, an active stratovolcano made from layers of lava and tephra, is the youngest vent in the Tongariro volcanic complex of New Zealand.

Nyiragongo, a stratovolcano in the Virunga Mountains of the Great Rift Valley, is in the Virunga National Park, Democratic Republic of the Congo. Nyiragongo, and nearby Nyamuragira, are responsible for 40% of Africa's historical volcanic eruptions.

In 2002 Nyiragongo erupted with lava flowing to the outskirts of Goma where the population of 400,000 people had fled across the Rwandan border.

* Decade Volcano List

Okmok Caldera on Umnak Island in the eastern Aleutian Islands of Alaska is the remains of major eruptions that occured approximately 8,300 and 2,400 years ago.

Ol Doinyo Lengai, “The Mountain of God” in the Maasai language, is located in the north of Tanzania.

Ol Doinyo Lengai is part of the volcanic system of the Great Rift Valley in Eastern Africa.

The lava of Ol Doinyo Lengai is a carbonatite and results in the most unusual volcanic landscape in the world.

Ollague is a massive stratovolcano on the border between Bolivia and Chile.

The Martian Olympus Mons volcano is the largest volcano in the Solar System and three times higher than Earth's Mount Everest and wider than the entire Hawaiian volcano chain (342 miles in width with a caldera complex 53 miles long, 37 miles wide, and up to 1.8 miles deep with six overlapping pit craters).

Olympus Mons is a shield volcano with shallow-sloping sides resembling a warrior's shield.

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Osorno is conical stratovolcano in Los Lagos Region of Chile.

Osorno, which resembles Japan's Mount Fiji, is one of the most active volcanoes in the southern Andes. Charles Darwin observed the 1835 eruption from a distance on the second voyage of the Beagle.