Why is russia officially call the russian federation

Russia is officially called the Russian Federation (RF) because it is constituted of about 85 federal constituent units.

Explanation:

A federation is basically a larger government made up of many other smaller governing units of principalities. The country of Russia is divided into '85 such federal units' which are administered by their own local governing bodies. These local governing bodies are accountable to the central government of Russia. The central government performs supervision over the smaller federal units and is the supreme parent authority.

Earthquake waves that vibrate from side to side and up and down only through solids are known as "seismic waves."hope my answer has you : )