Volcanic gases entering the atmosphere with tephra during eruption of Augustine Volcano, Alaska, 2006
Volcanic gases are gases given off by active (or, at times, by dormant) volcanoes. These include gases trapped in cavities (vesicles) in volcanic rocks, dissolved or dissociated gases in magma and lava, or gases emanating from lava, from volcanic craters or vents. Volcanic gases can also be emitted through groundwater heated by volcanic action.
The sources of volcanic gases on Earth include:
primordial and recycled constituents from the Earth's mantle,
assimilated constituents from the Earth's crust,
groundwater and the Earth's atmosphere.
Substances that may become gaseous or give off gases when heated are termed volatile substances.
Volcanicgases are gases given off by active (or, at times, by dormant) volcanoes. These include gases trapped in cavities (vesicles) in volcanic rocks...
a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes...
including particles larger than 2 mm. Volcanic ash is formed during explosive volcanic eruptions when dissolved gases in magma expand and escape violently...
a volcanic eruption of the most violent type. A notable example is the 1980 eruption of Mount St. Helens. Such eruptions result when sufficient gas has...
multi-component gas analyzer system (Multi-GAS) is an instrument package used to take real-time high-resolution measurements of volcanicgas plumes. Multi-GAS measurements...
Volcanism, vulcanism, volcanicity, or volcanic activity is the phenomenon where solids, liquids, gases, and their mixtures erupt to the surface of a solid-surface...
main types of volcanic eruption: Magmatic eruptions are the most well-observed type of eruption. They involve the decompression of gas within magma that...
eruptions that ended 57,000 years ago. Mammoth still produces hazardous volcanicgases that kill trees. Mammoth Mountain is a lava dome complex in Mono County...
A volcanic hazard is the probability a volcanic eruption or related geophysical event will occur in a given geographic area and within a specified window...
is done by sulfate-reducing microorganisms. It also occurs in volcanicgases, natural gas deposits, and sometimes in well-drawn water. Hydrogen sulfide...
hot volcanicgases and vapors are emitted, without any accompanying liquids or solids. Fumaroles are characteristic of the late stages of volcanic activity...
plumbing system is complex, involving regional tectonic structures. Volcanicgas sampled at Ol Doinyo Lengai consists mostly of water vapor and carbon...
bowl-shaped feature containing one or more vents. During volcanic eruptions, molten magma and volcanicgases rise from an underground magma chamber, through a...
into lakes. Toxic volcanicgas has caused fatalities and is a hazard at several craters. On 20 February 1979, 149 people died of gas poisoning in Pekisaran...
Volcanic cones are among the simplest volcanic landforms. They are built by ejecta from a volcanic vent, piling up around the vent in the shape of a cone...
scientists[who?] hypothesize[example needed] that events much like the 1986 volcanicgas releases at Lake Nyos, Cameroon, could account for the large deposition...
Volcanicgas includes a variety of substances. These include gases trapped in cavities (vesicles) in volcanic rocks, dissolved or dissociated gases in...
the order of a few nanoseconds. Greenhouse gas List of gases Natural gasVolcanicgas Breathing gas Wind "Gas". Merriam-Webster. 7 August 2023. This early...
provide constraints on the global volcanic carbon flux by 1) establishing a database of volcanic and hydrothermal gas compositions and fluxes linked to...
small bubbles of gas inside of volcanic magma. These accumulate into one large bubble, which starts to rise through the lava plume. Gas slugs also consist...
The Auckland volcanic field is an area of monogenetic volcanoes covered by much of the metropolitan area of Auckland, New Zealand's largest city, located...
A volcanic plug, also called a volcanic neck or lava neck, is a volcanic object created when magma hardens within a vent on an active volcano. When present...
Outbreaks of lava fountains up to 300 feet (90 m) high, lava flows, and volcanicgas in the Leilani Estates subdivision were preceded by earthquakes and ground...
indirectly linked to volcanic eruptions. Lake Monoun Lake Nyos Due to the largely invisible nature of the underlying cause (CO2 gas) behind limnic eruptions...
an area of poisonous volcanicgas near the Kikhpinych volcano in Russia The Valley of Death, an area of poisonous volcanicgas near the Tangkuban Perahu...
bowl. It is also known as "Mount Pipe" (パイプ山, paipu-yama), since the volcanicgas and water vapor that rolls in from the summit, alongside the rest of...
when volcanic activity is high: an effusive eruption occurred in 2002, the first in 17 years, and again in 2003, 2007, and 2013–14. Volcanicgas emissions...
volcanicgases from deep lake waters. These discharges can cause large water displacements in lakes, triggering lake tsunamis. Lake Nyos, a volcanic crater...
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