Nemrut (volcano) of the earliest trade routes. Two eruptions of Nemrut were probably witnessed by people of Urartu, an ancient state located in the eastern Turkey. These eruptions occurred c. 787 BC (period of King Menua) and c. 657 BC (period of King Rusa II), and the latter eruption might cause the sudden disappearance of the city Uaiais located 30 km east of Süphan. In the 1980s, Japanese volcanologists studied the evolution of gases inside the caldera of Nemrut. They found that the ratio of helium isotopes He/He is 1.06, which indicates volcanic activity (most of the measured helium evolved from the
Nemrut (volcano) Nemrut are mentioned in Armenian sources of the 15th century and Kurdish sources of the 16th century. These records allowed to confirm the activity of the volcano during the Holocene and to establish the dates of some eruptions. A more recent eruption is mentioned in Turkish records: The Armenian name of the volcano (: angry) might also reflect the regular activity of the volcano in the historical period. The first systematic studies of the volcano began in the mid-19th century, when, taking advantage of the British influence in the region, it was visited by several European explorers. They described and