Volcanic ash

  • volcanic ash streams out in an elongated fan shape as it is dispersed into the atmosphere.
    ash cloud from the 2008 eruption of chaitén volcano, chile, stretching across patagonia from the pacific to the atlantic ocean.
    ash plume rising from eyjafjallajökull on april 17, 2010.
    volcanic ash deposits on a parked mcdonnell-douglas dc-10-30 during the 1991 eruption of mount pinatubo, causing the aircraft to rest on its tail. while falling ash behaves in a similar manner to snow, the sheer weight of deposits can cause serious damage to buildings and vehicles, as seen here, where the deposits were able to cause the 120 ton airliner's centre of gravity to shift.

    volcanic ash consists of fragments of rock, minerals, and volcanic glass, created during volcanic eruptions and measuring less than 2 mm (0.079 inches) in diameter.[1] the term volcanic ash is also often loosely used to refer to all explosive eruption products (correctly referred to as tephra), including particles larger than 2 mm. volcanic ash is formed during explosive volcanic eruptions when dissolved gases in magma expand and escape violently into the atmosphere. the force of the gasses shatters the magma and propels it into the atmosphere where it solidifies into fragments of volcanic rock and glass. ash is also produced when magma comes into contact with water during phreatomagmatic eruptions, causing the water to explosively flash to steam leading to shattering of magma. once in the air, ash is transported by wind up to thousands of kilometres away.

    due to its wide dispersal, ash can have a number of impacts on society, including animal and human health, disruption to aviation, disruption to critical infrastructure (e.g., electric power supply systems, telecommunications, water and waste-water networks, transportation), primary industries (e.g., agriculture), buildings and structures.

  • formation
  • properties
  • dispersal
  • impacts
  • preparedness, mitigation and management
  • volcanic ash soils
  • see also
  • references
  • external links

Volcanic ash streams out in an elongated fan shape as it is dispersed into the atmosphere.
Ash cloud from the 2008 eruption of Chaitén volcano, Chile, stretching across Patagonia from the Pacific to the Atlantic Ocean.
Ash plume rising from Eyjafjallajökull on April 17, 2010.
Volcanic ash deposits on a parked McDonnell-Douglas DC-10-30 during the 1991 eruption of Mount Pinatubo, causing the aircraft to rest on its tail. While falling ash behaves in a similar manner to snow, the sheer weight of deposits can cause serious damage to buildings and vehicles, as seen here, where the deposits were able to cause the 120 ton airliner's centre of gravity to shift.

Volcanic ash consists of fragments of rock, minerals, and volcanic glass, created during volcanic eruptions and measuring less than 2 mm (0.079 inches) in diameter.[1] The term volcanic ash is also often loosely used to refer to all explosive eruption products (correctly referred to as tephra), including particles larger than 2 mm. Volcanic ash is formed during explosive volcanic eruptions when dissolved gases in magma expand and escape violently into the atmosphere. The force of the gasses shatters the magma and propels it into the atmosphere where it solidifies into fragments of volcanic rock and glass. Ash is also produced when magma comes into contact with water during phreatomagmatic eruptions, causing the water to explosively flash to steam leading to shattering of magma. Once in the air, ash is transported by wind up to thousands of kilometres away.

Due to its wide dispersal, ash can have a number of impacts on society, including animal and human health, disruption to aviation, disruption to critical infrastructure (e.g., electric power supply systems, telecommunications, water and waste-water networks, transportation), primary industries (e.g., agriculture), buildings and structures.

Other Languages
العربية: رماد بركاني
azərbaycanca: Vulkan külü
Basa Banyumasan: Awu vulkanik
беларуская: Вулканічны попел
čeština: Sopečný popel
Esperanto: Vulkana cindro
한국어: 화산재
hrvatski: Vulkanski pepeo
Bahasa Indonesia: Abu vulkanik
íslenska: Eldfjallaaska
עברית: אפר געשי
македонски: Вулкански пепел
Bahasa Melayu: Abu gunung berapi
Nederlands: As (vulkaan)
日本語: 火山灰
norsk nynorsk: Vulkansk oske
Plattdüütsch: Asch (Vulkan)
português: Cinza vulcânica
සිංහල: යමහල් අළු
slovenčina: Vulkanický popol
slovenščina: Vulkanski pepel
српски / srpski: Вулкански пепео
srpskohrvatski / српскохрватски: Vulkanski pepeo
Türkçe: Volkanik kül
українська: Вулканічний попіл
Tiếng Việt: Tro núi lửa
中文: 火山灰