Answer :
The oldest known active volcano is supposed to be Mount Etna in Sicily, Italy. It began erupting in the year 1500 BC, and since then, there have been around 200 eruptions. It is also one of the world's largest volcanoes that is known to exist.
Pliny the Younger witnessed what transpired while in a town 30 kilometers west of Mount Vesuvius and recorded his observations in a letter. Many people believe Pliny the Younger was the first person to discover volcanoes, and this is said to be the first account of a volcanic explosion in writing. Unzen. The oldest active volcano in the world, Mt. Unzen, is thought to have formed about 2.5 million years ago on the Japanese island of Kyushu. Vesuvius might have been the first officially recorded volcanic explosion in history thanks to Pliny's firsthand report. Eruptions as recently as roughly 50,000 years ago generated Koko Crater, one of the youngest of the features known as the Honolulu Volcanics. Another Honolulu volcano, Diamond Head, is 0.4–0.5 million years old. South of ancient Rome, on the Italian coast, in the shadow of Mount Vesuvius, an active volcano, sat Pompeii, a thriving tourist destination. The city of Pompeii was buried under a thick layer of volcanic ash during its most well-known eruption, which occurred in the year 79 A.D.
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