The department is mountainous in nature and includes a wide range of altitudes, from in Génova to in Sibilia. The average altitude is above mean sea level. The principal mountains include the volcanoes Cerro Quemado, Chicabal, Lacandon, Santa María, Santiaguito, Santo Tomás (also known as Picul) and Siete Orejas, as well as Zunil peak, often erroneously referred to as a volcano. Cerro Quemado produces a number of thermal springs, several of which have been converted into baths. The area covered by the department is seismically active, with earthquakes measuring from 4.5 to 5.2 on the Richter scale.