The Richter seismological scale, also known as the local magnitude scale, was long used to accurately measure the magnitude of an earthquake. It was established in 1935 by seismologist Charles Francis Richter and his colleague Beno Gutenberg. However, in the 21st century it was replaced, because it had originally been created to measure weak tremors. When calculating the magnitude of a stronger earthquake, it cannot differentiate all the largest earthquakes and interprets them as similar. Currently, its successor is the seismological moment magnitude scale, which was introduced by Thomas C. Hanks and Hiroo Kanamori in 1979. This coincides and continues with the parameters of the Richter scale, but serves to measure the energy released in earthquakes of magnitudes greater than 6.9, which is the point at which the previous one begins to fail. Another way to measure earthquakes is with the Modified Mercalli (MM) scale, which has twelve degrees expressed in Roman numerals (I to XII). This allows measuring its intensity (not magnitude) and the effects caused by the earthquake, which depend on the conditions of the terrain, the vulnerability of the buildings and the epicentral distance. The National Institute of Seismic Prevention of Argentina usually uses it to describe how the earthquake affected the land where it occurred, focusing on the buildings and the people present there.