This series includes lava flows as well as a compound lava dome on the western rim of the summit crater, which represent the youngest volcanic activity of Ollagüe. While there is no clear evidence of historical eruptions at Ollagüe, the volcano is considered to be potentially active and is monitored by the National Geology and Mining Service (SERNAGEOMIN) of Chile.
This series comprises lava flows as well as a composite dome on the western edge of the summit crater, signifying the most recent volcanic activity at Ollagüe. Although there is no clear evidence of past eruptions at Ollagüe, the volcano is regarded as possibly active and monitored by SERNAGEOMIN.