Ninety-three percent of Tajikistan's territory is mountainous, and the mountain glaciers are the source of its rivers. Tajikistan is an earthquake-prone area. The republic is bounded by China in the east, Afghanistan to the south, and Uzbekistan and Kyrgyzstan to the west and north. The central Asian republic also includes the Gorno-Badakh Shan Autonomous region. Tajikistan is slightly larger than the state of Illinois.