A number of dates have been obtained on Falso Azufre; with the exception of the oldest ones on the Kunstmann edifice (3.5 to 2.9 million years ago) Falso Azufre has only yielded ages of less than one million years, with older dates found in the western part of the volcano and the younger dates of less than 400,000 years ago in the eastern part; the absolutely youngest date was obtained on a lava flow linked to Dos Conos; 160,000 ± 80,000 years ago. Falso Azufre could thus be considered an extinct volcano, although recent activity cannot be ruled out. While the remoteness of the volcano reduces any hazard potential future pyroclastic eruptions could impact air traffic over the region and east of it; further a major road is close to the volcano.