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There have been innumerable eruptions and volcanic outbursts. And we have no way of counting the individual eruptions in much of pre history.
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Mt. St. Helens does not have eruptions on a yearly basis. It is an active volcano, so the frequency and size of eruptions can vary. Since its catastrophic eruption in 1980, there have been smaller eruptions in subsequent years, but there is no fixed average number of eruptions per year.
Mauna Loa has had 39 eruptions
Soufriere Hills volcano in Montserrat has primarily experienced explosive eruptions. These eruptions are characterized by the ejection of ash, gas, and pyroclastic material from the volcano. However, there have been periods of effusive eruptions as well, where lava flows have been released from the volcano.
mount st helens
There have been approximately 1500-1600 volcanic eruptions in the last 30 years, with some years seeing more activity than others. Volcanic eruptions can vary in scale and impact, from small, short-lived eruptions to large, catastrophic events.
Mount Vesuvius has had numerous eruptions throughout history, with the most famous being the eruption in 79 AD that destroyed the Roman cities of Pompeii and Herculaneum. There have been over 50 eruptions recorded since then, with the most recent ones occurring in the 20th century.
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There has been no eruptions in recorded history
a volcano