Prediction of volcanic activity in the context of Mount Redoubt

⭐ Core Definition: Prediction of volcanic activity

Prediction of volcanic activity, and volcanic eruption forecasting, is an interdisciplinary monitoring and research effort to predict the time and severity of a volcano's eruption. Of particular importance is the prediction of hazardous eruptions that could lead to catastrophic loss of life, property, and disruption of human activities.

Risk and uncertainty are central to forecasting and prediction, which are not necessarily the same thing in the context of volcanoes, where opinions have often played a role, and the prediction in time (forecasting) for an individual volcano is different from predicting eruption characteristics for apparently similar volcanoes. Both forecasting and prediction have processes based on past and present data.

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👉 Prediction of volcanic activity in the context of Mount Redoubt

Redoubt Volcano, or Mount Redoubt (Dena'ina: Bentuggezh K’enulgheli), is an active stratovolcano in the largely volcanic Aleutian Range of the U.S. state of Alaska. Located at the head of the Chigmit Mountains subrange in Lake Clark National Park and Preserve, the mountain is just west of Cook Inlet, in the Kenai Peninsula Borough about 110 miles (180 km) southwest of Anchorage. At 10,197 feet (3,108 m), in just over 5 miles (8.0 km) Mount Redoubt attains 9,150 feet (2,790 m) of prominence over its surrounding terrain. It is the highest summit in the Aleutian Range. In 1976, Redoubt Volcano was designated as a National Natural Landmark by the National Park Service.

Active for millennia, Mount Redoubt has erupted four times since it was first observed: in 1902, 1966, 1989 and 2009, with two questionable eruptions in 1881 and 1933. The eruption in 1989 spewed volcanic ash to a height of 45,000 ft (13,700 m). It caught KLM Flight 867, a Boeing 747 aircraft, in its plume. After the plane descended 13,000 feet, the pilots restarted the engines and landed the plane safely at Anchorage. The ash blanketed an area of about 7,700 mi (20,000 km). The 1989 eruption is also notable for being the first ever volcanic eruption to be successfully predicted by the method of long-period seismic events developed by Swiss/American volcanologist Bernard Chouet. As of 2018, the US Geological Survey rated Mount Redoubt a "very high threat" to people and infrastructure.

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⭐ Core Definition: Prediction of volcanic activity
👉 Prediction of volcanic activity in the context of Mount Redoubt
Prediction of volcanic activity in the context of Christopher G. Newhall
Prediction of volcanic activity in the context of Soufrière Hills volcano
Prediction of volcanic activity in the context of Fumarole

Prediction of volcanic activity in the context of Christopher G. Newhall

Christopher G. Newhall is a volcanologist, formerly with the U.S. Geological Survey and the Earth Observatory of Singapore. He is the co-creator of the Volcanic explosivity index and specializes in volcanic prediction.

View the full Wikipedia page for Christopher G. Newhall

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Prediction of volcanic activity in the context of Soufrière Hills volcano

The Soufrière Hills (/ˈsuːfriɛər/) is an active, complex stratovolcano with many lava domes forming its summit on the Caribbean island of Montserrat, an overseas territory of the United Kingdom. After a long period of dormancy, the Soufrière Hills volcano became active in 1995 and continued to erupt until 2010. Its last eruption was in 2013. Its eruptions have rendered more than half of Montserrat uninhabitable, destroying the capital city, Plymouth, and causing widespread evacuations: about two-thirds of the population have left the island. Chances Peak in the Soufrière Hills was the highest summit on Montserrat until the mid-1990s, but it has since been eclipsed by various rising and falling volcanic domes during the recent volcanic activity.

The volcano is andesitic in nature, and the current pattern of activity includes periods of lava dome growth, punctuated by brief episodes of dome collapse which result in pyroclastic flows, ash venting, and explosive eruption. The volcano is monitored by the Montserrat Volcano Observatory. Volcanic gas emissions from this volcano are measured by a multi-component gas analyzer system, which detects pre-eruptive degassing of rising magmas, improving prediction of volcanic activity.

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Prediction of volcanic activity in the context of Fumarole

A fumarole (/ˈfjuːməˌroʊl/; also spelled fumerole) is a vent through the surface of Earth or another terrestrial planet from which hot volcanic gases and vapors are emitted, without any accompanying liquids or solids. Fumaroles are characteristic of the late stages of volcanic activity, but fumarole activity can also precede a volcanic eruption and has been used for eruption prediction. Most fumaroles die down within a few days or weeks of the end of an eruption, but a few are persistent, lasting for decades or longer. An area containing fumaroles is known as a fumarole field.

The predominant vapor emitted by fumaroles is steam, formed by the circulation of groundwater through heated rock. This is typically accompanied by volcanic gases given off by magma cooling deep below the surface. These volcanic gases include sulfur compounds, such as various sulfur oxides and hydrogen sulfide, and sometimes hydrogen chloride, hydrogen fluoride, and other gases. A fumarole that emits significant sulfur compounds is sometimes called a solfatara.

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⭐ Core Definition: Prediction of volcanic activity

👉 Prediction of volcanic activity in the context of Mount Redoubt

Prediction of volcanic activity in the context of Christopher G. Newhall

Prediction of volcanic activity in the context of Soufrière Hills volcano

Prediction of volcanic activity in the context of Fumarole