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Sangay (also known as Macas, Sanagay, or Sangai) [8] is an active stratovolcano in central Ecuador.It exhibits mostly strombolian activity. Geologically, Sangay marks the southern boundary of the Northern Volcanic Zone, and its position straddling two major pieces of crust accounts for its high level of activity.
A soda geyser is a physical reaction between a carbonated beverage, usually Diet Coke, and Mentos mints that causes the beverage to be expelled from its container. The candies catalyze the release of gas from the beverage, which creates an eruption that pushes most of the liquid up and out of the bottle.
Mount Sinabung is a Pleistocene-to-Holocene stratovolcano. [11] It is located in a relatively cool area on a fertile plateau with mountains bounding the north. [12] The summit crater of the volcano has a complex, longer form due to vents migrating on the N-S line. [11]
Wah Wah Springs Caldera is a supervolcanic eruption remnant discovered in 2013 in Utah. It released 5,500 to 5,900 cubic kilometres (1,300 to 1,400 cu mi) of tephra, as the Wah Wah Springs Tuff, about 30.06 million years ago in the early Oligocene. It is the largest of the Indian Peak-Caliente Caldera Complex, and includes flows over 500 m ...
The activity pattern of the eruption was comparable to that of the event that occurred in 1902, which had a Volcanic Explosivity Index (VEI) of 4. [5] [1] The volcano is known to have erupted 23 times in the last 4,000 years, and had been dormant since 1979. [1] Evacuation of the inhabitants of the island began when the explosive eruptions ...
The first major volcanic event 240,000 years ago was the initial Mamaku eruption followed within an hours/days/weeks of a smaller eruption (phase 1) from the same mush body feeding the Ohakuri Caldera about 30 km (19 mi) to the south. [2] Ignimbrite, up to 180 metres (590 ft) thick was deposited in the surrounding area to the south of Rotorua. [1]
In 2023, a total of 21,100 eruptions were recorded from the volcano, making it the second most active volcano in Indonesia. [5] On 16 May 2024, the Volcanological Survey of Indonesia raised its highest alert level (Red/IV) for Mount Ibu following another series of eruptions. [6] As a result, seven villages were evacuated. [7]
The eruption rate of the MEVC has varied throughout its long volcanic history. When the volcanic complex started erupting at least 7.4 million years ago, it increased the rate of magmatism in the Northern Cordilleran Volcanic Province from 100,000 to 300,000 cubic metres (3,500,000 to 10,600,000 cubic feet) per year.