Volcanic gases 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. The process that...

eruptions that ended 57,000 years ago. Mammoth still produces hazardous volcanic gases that kill trees. Mammoth Mountain is a lava dome complex in Mono County...

multi-component gas analyzer system (Multi-GAS) is an instrument package used to take real-time high-resolution measurements of volcanic gas plumes. Multi-GAS measurements...

main types of volcanic eruption: Magmatic eruptions are the most well-observed type of eruption. They involve the decompression of gas within magma that...

Volcanism, vulcanism, volcanicity, or volcanic activity is the phenomenon where solids, liquids, gases, and their mixtures erupt to the surface of a solid-surface...

plumbing system is complex, involving regional tectonic structures. Volcanic gas sampled at Ol Doinyo Lengai consists mostly of water vapor and carbon...

is done by sulfate-reducing microorganisms. It also occurs in volcanic gases, natural gas deposits, and sometimes in well-drawn water. Hydrogen sulfide...

000–4,000 tons of sulfur dioxide (SO2) every day. Vog is created when volcanic gases (primarily oxides of sulfur) react with sunlight, oxygen and moisture...

hot volcanic gases and vapors are emitted, without any accompanying liquids or solids. Fumaroles are characteristic of the late stages of volcanic activity...

multi-component gas analyzer system (Multi-GAS) is an instrument package used to take real-time high-resolution measurements of volcanic gases. A Multi-GAS package...

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...

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 hazard is the probability a volcanic eruption or related geophysical event will occur in a given geographic area and within a specified window...

scientists[who?] hypothesize[example needed] that events much like the 1986 volcanic gas releases at Lake Nyos, Cameroon, could account for the large deposition...

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...

bowl-shaped feature containing one or more vents. During volcanic eruptions, molten magma and volcanic gases rise from an underground magma chamber, through a...

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...

lake waters, forming a gas cloud capable of asphyxiating wildlife, livestock, and humans. Scientists believe earthquakes, volcanic activity, and other explosive...

the order of a few nanoseconds. Greenhouse gas List of gases Natural gas Volcanic gas Breathing gas Wind "Gas". Merriam-Webster. 7 August 2023. This early...

bowl. It is also known as "Mount Pipe" (パイプ山, paipu-yama), since the volcanic gas and water vapor that rolls in from the summit, alongside the rest of...

other settlements. The eruption ejected a cloud of stones, ash and volcanic gases to a height of 33 km (21 mi), erupting molten rock and pulverized pumice...

into lakes. Toxic volcanic gas 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...

was a meticulous and talented scientist, known for his analyses of volcanic gases and their relationship to eruptions. This, along with his enthusiasm...

increase in the levels of toxic gases in the air. Volcanic gas emissions from this volcano are measured by a Multi-Component Gas Analyzer System, which detects...

Outbreaks of lava fountains up to 300 feet (90 m) high, lava flows, and volcanic gas in the Leilani Estates subdivision were preceded by earthquakes and ground...

when volcanic activity is high: an effusive eruption occurred in 2002, the first in 17 years, and again in 2003, 2007, and 2013–14. Volcanic gas emissions...

into the air. Each episode thus releases volcanic gases, sometimes as frequently as a few minutes apart. Gas slugs can form as deep as 3 kilometers, making...

The Wells Gray-Clearwater volcanic field, also called the Clearwater Cone Group, is a potentially active monogenetic volcanic field in east-central British...