Leonard Kniaseff

Mount Leonard Kniaseff, or simply Leonard Kniaseff (or Leonard Kniazeff), is a stratovolcano between the municipalities of Mabini and Maco in the province of Davao de Oro, island of Mindanao, Philippines.

It has a 2.03 km diameter caldera lake called Lake Leonard. Amacan Thermal Area is located 5 aerial kilometer south-southwest of Lake Leonard.

Leonard Kniaseff is one of the active volcanoes in the Philippines, part of the Pacific ring of fire.

Activity
The Leonard Kniaseff Volcano's area has been an object to a geothermal exploration program.

Manat thermal area is north of Lake Leonard, solfataras occur around its southwest rim, and active solfataras, fumaroles, and hot springs are found in the Amacan-Gopod thermal area south of the lake.

There was a scare in 1995 but PHIVOLCS' investigation at that time did not disclose any unusual activity, and no unusual activity has been reported since then.

Its last eruption was dated as early as c. 120 AD.