I agree that is not a quantificable feat, the phenomena is impresive, but that alone wont give us numbers in terms of energy release or force of power.
However, in the same feat, the Earth is being shake in a whole earthquake, so that is posible to measure, ot at least make the theory.
According with this site:
http://www.earthquake.iatp.ge/earthquakes.htm
"The strongest earthquake was in 1960-Chile earthquake. M=9.5 and in 1964 “Alaska earthquake”. In the Chile the ground hole made by the earthquake was 1000 kilometers long. The energy was 1025. It is equal to 1000 nuclear bomb explosion. We can say that earthquake is strong if its magnitude is more than six points and it can provoke big destruction"
To move the whole planet in earthquakes, will be needed a bigger force of energy than the one in Chile/alaska that it said to be 1000 nuclear bomb explosion, therefore the power of son Goku according to the feat is superior to that.
Now this "theory" it could be more clear it we find an analisis of how much force of energy is needed for the planet to shake.
Now i know toriyama did not care about this theories, he just made the history, that is why DB is fun to debate, because is down to interpretations.