The Region has been hit by many earthquakes, including the most powerful earthquake ever recorded (the Great Chilean Earthquake in 1960) and the earthquake of 2010, when many communities in the region were greatly affected by the earthquake and the following tsunami.
Geography
The Bío Bío region has area of 23,890.2 square kilometres (9,224.1 square miles).[4]
The main river in the region is the Bío Bío River. It is 380 kilometres (236 miles) long. It is the second longest river of Chile after the Loa River.
Population
The Bío Bío Region has 1,557,414 inhabitants (2017 census). It is the third region by population, after the Valparaíso Region. Its population density was 65.2.
Administration
The Bío Bío region is further subdivided into three provinces: Arauco, Bío Bío and Concepción.