Occurrence of Attributes in Original Text
The text related to the cultural heritage 'Mount Etna' has mentioned 'Volcanism' in the following places:
| Occurrence Sentence | Text Source |
|---|---|
| [15] About 300,000xc2xa0years ago, volcanism began occurring to the southwest of the summit (centre top of the volcano), then activity moved towards the present centre 170,000xc2xa0years ago. | WIKI |
| The Global Volcanism Program has assigned a volcanic explosivity index (VEI) to all of Mount Etna's eruptions since January 1955:[45] | WIKI |
| 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. | UNESCO |