**2. Location and geography**

The Jos Plateau is located in the Northcentral area of Nigeria. It is the second largest volcanic province in Nigeria after the Biu Plateau [4, 7] and consists of about 22 volcanoes [3, 8]. The Panyam Volcanic Line is the second Southwest end member of the Jos Plateau volcanic region. The Pidong volcano is the southernmost of a series of 7 volcanoes of the Panyam Volcanic Line located in the southwestern segment of the Jos Plateau. The Pidong volcanic crater lake is located on the summit of the Pidong volcano within the southernmost of the 3 crater and lies on longitude 90 12′20ˮ-90 12′40ˮ and latitude 90 18′50″- 90 19′10ˮ at an altitude of 1300 m. The lake's morphological and bathymetric data shows that the lake has a length of 160 m with maximum depth of 6 m [9, 10].
