Volcanism - Wikipedia
Volcanism, vulcanism, volcanicity, or volcanic activity is the phenomenon where solids, liquids, gases, and their mixtures erupt to the surface of a solid-surface astronomical body such as a planet or a moon. [1]
Volcano - Wikipedia
Volcano. Augustine Volcano (Alaska) during its eruptive phase on January 24, 2006. A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. The process that forms volcanoes is called volcanism.
Volcanism | Examples, Effects, & Facts | Britannica
volcanism, any of various processes and phenomena associated with the surficial discharge of molten rock, pyroclastic fragments, or hot water and steam, including volcanoes, geysers, and fumaroles.
About Volcanoes | U.S. Geological Survey - USGS.gov
About Volcanoes. By Volcano Hazards Program. Volcanoes are openings, or vents where lava, tephra (small rocks), and steam erupt onto the Earth's surface. Volcanic eruptions can last days, months, or even years.
Timeline of volcanism on Earth - Wikipedia
This timeline of volcanism on Earth includes a list of major volcanic eruptions of approximately at least magnitude 6 on the Volcanic explosivity index (VEI) or equivalent sulfur dioxide emission during the Quaternary period (from 2.58 Mya to the present). Other volcanic eruptions are …
Volcanism Definition & Meaning - Merriam-Webster
2024年9月14日 · Examples of volcanism in a Sentence. Recent Examples on the Web But an intense, prolonged El Niño event that lasted years and originated from an ancient body of water much larger than today’s Pacific Ocean would have enhanced the effects of the volcanism.
7.3: Types of Volcanism - Geosciences LibreTexts
2023年11月24日 · One of the conspicuous features of Kilauea caldera is the sight of rising water vapour (the white cloud in Figure 7.3.9) and a strong smell of sulphur (Figure 7.3.10). As is typical in magmatic regions, water is the main volatile component, followed by …
Global Volcanism Program
The Global Volcanism Program (GVP) seeks better understanding of all volcanoes through documenting their eruptions--small as well as large--during the past 12,000 years.
4.5: Volcanism - Geosciences LibreTexts
4.5: Volcanism. Page ID. Chris Johnson, Matthew D. Affolter, Paul Inkenbrandt, & Cam Mosher. Salt Lake Community College via OpenGeology. When magma emerges onto the Earth’s surface, the molten rock is called lava. A volcano is a type of …
Volcano | Definition, Types, & Facts | Britannica
2024年10月7日 · Volcano, vent in the crust of Earth or another planet or satellite, from which issue eruptions of molten rock, hot rock fragments, and hot gases. The term volcano can also refer to the landform created by the accumulation of …