User blog:Morning Star TM/RWBY - Yang shakes the entire fighting arena

Introduction
Feat happens here: https://streamable.com/a72fs

Calculation
To know how much energy is used, i will use the full image of the arena. Just ignore the other lines ans the blue one, since this one will be the most important one:

According to another calculation from Vs Battles Wiki, the silver ring that has the blue pixel line is 30.817 m in diameter.

30.817/241 = 0.13 m/px.

Arena = 1228 px = 159.64 m.

Radius of arena = 79.82 m.

Energy output of the earthquake = (earthquake energy on planet)* (4*pi*(radius of arena)^2 / pi*(radius of planet)^2) = (earthquake energy on planet)* (4*pi*(79.82)^2 / pi*(6371000)^2) = (earthquake energy on planet)* (80095.5/1.3e14) = (earthquake energy on planet) * 6.161192307692e-10

When Yang created that earthquake, it caused a volcanic eruption behind her, so i will assume a magnitude values worth of 6 and 7, since volcanic eruptions are triggered by this magnitude value.

E = 4.459613919340E24 * 6.161192307692e-10 = 2.747653897511378e15 Joules = 656.7 Kilotons of TNT (Large Town Level)

E (Magnitude 7) = 1.410253747010E26 * 6.161192307692e-10 = 8.688844537971832e16 Joules = 20.8 Megatons of TNT (City Level)

Personally, i will go with the Magnitude 7 result, since volcanic eruptions are triggered with Magnitude values greater than 6. That and this feat is extremely consistent with the feat of Raven Branwen creating that storm casually.