Introduction to South Korea

The Korean Peninsula, positioned at the heart of Northeast Asia, shares its borders with three major nations: China, Russia, and Japan. Notably, the southern part of the Peninsula, which comprises South Korea and lies below the Military Demarcation Line, occupies around 100,364 square kilometers. This geographical expanse offers a rich tapestry of cultural, historical, and natural significance, making the Korean Peninsula a captivating region in Asia. About three-quarters of Korea's landscape is dominated by majestic mountains, with elevations highest in the east and gradually descending westward. The northern and eastern regions feature towering peaks over 1,000 meters, shaping the country's character. As a peninsula, Korea is surrounded by three seas, boasting a coastline of 17,000 kilometers and numerous islands. The East Sea has a smooth coastline and deep waters, while the West and South Seas feature intricate shorelines and abundant islands. Together, these waters create diverse ecosystems, with the South Sea often referred to as Dadohae, or "the sea of many islands." The highest peak is Mount Halla, an extinct volcano on Jeju Island, which is approximately 6,400 ft above sea level. 

Source: https://www.korea.net/AboutKorea/Society/South-Korea-Summary 

The difference between hazards, disasters and catastrophies:

Natural Hazard—A natural process or event that is a possible threat to humans and property.

Disaster—A hazardous event that happens within a limited amount of time and defined area. Such an event occurs when any of the following happens: 10 or more people killed, 100 or more affected, a state of emergency is declared, or international assistance is requested.

Catastrophe—A significant disaster necessitating extensive financial expenses and years of recovery (the 1906 San Francisco earthquake for example).