See also: List of largest craters in the Solar System Ceres Ahuna Mons 4 km (2.5 mi)[33] 0.85 cryovolcanic[34] Isolated steep-sided dome in relatively smooth area; max. height of ~ 5 km on steepest side; roughly antipodal to largest impact basin on Ceres Io Boösaule Montes "South"[35] 17.5 to 18.2 km (10.9 to 11.3 mi)[36] 1.0 tectonic Has a 15 km (9 mi) high scarp on its SE margin[37] Ionian Mons east ridge 12.7 km (7.9 mi) (approx.)[37][38] 0.70 tectonic Has the form of a curved double ridge Euboea Montes 10.3 to 13.4 km (6.4 to 8.3 mi)[39] 0.74 tectonic A NW flank landslide left a 25,000 km3 debris apron[40][n 10] unnamed (245° W, 30° S) 2.5 km (1.6 mi) (approx.)[41][42] 0.14 volcanic One of the tallest of Io's many volcanoes, with an atypical conical form[42][n 11] Mimas Herschel central peak 7 km (4 mi) (approx.)[44] 3.5 impact See also: List of largest craters in the Solar System Dione Janiculum Dorsa 1.5 km (0.9 mi)[45] 0.27 tectonic[n 12] Surrounding crust depressed ca.