Assertion: archipelago's island | /r/HasAspect | sporadic eruptions
Facets:
value: since the 14th century
type: TEMPORAL
Source sentences:
text: Although all islands have experienced volcanism during their geological history, within recorded "human settlement" history the islands of Santa Maria, Graciosa, Flores, and Corvo have not experienced any volcanic eruptions; in addition to active fumaroles and hot-springs, the remaining islands have had sporadic eruptions since the 14th century.