It`s the most easterntip volcanoe of the Cordillera Central (the second volcanoe in the country in respect of metres above sea level-3.339). It has been active since 6.300 BC. In colonial times that was nicknamed by Spaniards as Torre Alba "white tower", because of its eruptions gave the impression of a huge white tower. It has three craters. To the main of them doesn`t lead any way. The catastrophic eruptions happened also in 1723, 1847, 1853, 1855 and 1861. Now the scientists claim its new eruption might be expected.
In March 2001 around volcanoe was felt some tremours and shakes. Many residents of the nearby area were afraid that it is the new cycle of activity, but the scientists claimed the shakes had nothing to do with that.