It is difficult to distinguish an extinct volcano from a ...
Villarrica, one of Chile's most active volcanoes erupted in ...
Mount Etna is an active stratovolcano on the east coast of ...
Mount Bulusan is the southernmost volcano on Luzon Island ...
Extinct volcanoes are those that scientists consider ...
An earthquake (also known as a quake, tremor or temblor) is ...
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