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  2. Volcano - Wikipedia

    en.wikipedia.org/wiki/Volcano

    A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, ...

  3. Sangay - Wikipedia

    en.wikipedia.org/wiki/Sangay

    Sangay (also known as Macas, Sanagay, or Sangai) [8] is an active stratovolcano in central Ecuador.It exhibits mostly strombolian activity. Geologically, Sangay marks the southern boundary of the Northern Volcanic Zone, and its position straddling two major pieces of crust accounts for its high level of activity.

  4. Volcanism - Wikipedia

    en.wikipedia.org/wiki/Volcanism

    On Earth, volcanoes are most often found where tectonic plates are diverging or converging, and because most of Earth's plate boundaries are underwater, most volcanoes are found underwater. For example, a mid-ocean ridge , such as the Mid-Atlantic Ridge , has volcanoes caused by divergent tectonic plates whereas the Pacific Ring of Fire has ...

  5. Active volcano - Wikipedia

    en.wikipedia.org/wiki/Active_volcano

    World map of active volcanoes and plate boundaries Kīlauea's lava entering the sea Lava flows at Holuhraun, Iceland, September 2014. An active volcano is a volcano that has erupted during the Holocene (the current geologic epoch that began approximately 11,700 years ago), is currently erupting, or has the potential to erupt in the future. [1]

  6. A powerful volcano is erupting. Here’s what that could mean ...

    www.aol.com/news/powerful-volcano-erupting-could...

    Mount Ruang spewed lava and and ash on April 17, seen from Sitaro, North Sulawesi. It also triggered lightning in the ash cloud -- a common phenomenon in powerful volcano eruptions.

  7. Volcanology - Wikipedia

    en.wikipedia.org/wiki/Volcanology

    Volcanoes, he said, were formed where the rays of the sun pierced the earth. The volcanoes of southern Italy attracted naturalists ever since the Renaissance led to the rediscovery of Classical descriptions of them by wtiters like Lucretius and Strabo. Vesuvius, Stromboli and Vulcano provided an opportunity to study the nature of volcanic ...

  8. Stratovolcano - Wikipedia

    en.wikipedia.org/wiki/Stratovolcano

    A stratovolcano, also known as a composite volcano, is a typically conical volcano built up by many alternating layers of hardened lava and tephra. [1] Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile with a summit crater and explosive eruptions. [2] Some have collapsed summit craters called calderas. [3]

  9. 'High threat' supervolcano could bring about an ice age when ...

    www.aol.com/news/2017-03-30-high-threat-super...

    Super volcano is the term used to describe volcanoes that have gradually over time built up immense amounts of magma and could wreak havoc if ejected onto the planet's surface.

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