Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Mount Etna' has mentioned 'Volcanic' in the following places:
Occurrence Sentence Text Source
The fertile volcanic soils support extensive agriculture, with vineyards and orchards spread across the lower slopes of the mountain and the broad Plain of Catania to the south.
Contents 1 Etymology and folklore 2 History of volcanic eruptions 2.1 Geological history 2.2 Historical eruptions 2.3 Modern-day eruptions (1928xe2x80x93present day) 2.3.1 Volcanic explosivity index of recent eruptions 2.3.2 Smoke rings 3 Geopolitical boundaries 4 Facilities 5 See also 6 Notes 7 References 8 External links
What were originally Welsh conceptions concerning a dwarf king of a paradisal, Celtic underworld became attached to the quasi-historic figure of Arthur as "Ruler of the Antipodes" and were then transplanted into a Sicilian milieu, by Bretons impressed by the already otherworldly associations of the great, volcanic mountain of their new home.
History of volcanic eruptions[edit]
Volcanic activity first took place at Etna about 500,000 years ago, with eruptions occurring beneath the sea off the ancient coastline of Sicily.
Eruptions at this time built up the first major volcanic edifice, forming a stratovolcano in alternating explosive and effusive eruptions.
[38] 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.
Volcanic explosivity index of recent eruptions[edit]
The Global Volcanism Program has assigned a volcanic explosivity index (VEI) to all of Mount Etna's eruptions since January 1955:[45]
Mount Etna is renowned for its exceptional level of volcanic activity, and the documentation of its activity over at least 2,700 years.
Criterion (viii): Mount Etna is one of the worldxe2x80x99s most active and iconic volcanoes, and an outstanding example of ongoing geological processes and volcanic landforms.
This exceptional volcanic activity has been documented by humans for at least 2,700 years xe2x80x93 making it one of the world's longest documented records of historical volcanism.
The diverse and accessible assemblage of volcanic features such as summit craters, cinder cones, lava flows, lava caves and the Valle de Bove depression have made Mount Etna a prime destination for research and education.
Natural hazards resulting from the volcanic activity of the property will always pose a risk to certain features and facilities of the park and beyond.