Magneto shows his control over electromagnetic forces by creating a planet sized electromagnetic pulse that disables every electrical device and machine of Earth:
Explosion that threatened Avengers (including Thor and She-Hulk) is stopped by “thin” and “hastily erected shield” of Magneto’s. He had battled Avengers for pages before that and was very weak from all assaults, which explains his struggling and weakness.
Xavier needed to combine Jean Grey’s power with his own to even attempt to try to break them (and he only succeeded at last when Magneto did not pay any attention to them).
He can perceive the world solely as patterns of magnetic and electrical energy, and sense disruptions alongside magnetic lines of force (which encompass the entire planet).
And psionic energy like telekinetic blasts won’t affect him either, he was able to shield himself from Phoenix’s blasts in second. And Phoenix was not holding back.
When he is using his powers, the magnetic energy inside him render his body’s durability and strength to Class 100 levels, enabling him to do such things as…
Break from Hercules’s bear hug and send him flying:
Not to mention that he was able to take full power energy assault from Bishop who had absorbed energies of nearly all energy using X-Men and the energy of the said X-Men without shield…and was still able to talk.
He has been able to lessen the effects of multiple nukes while feeling the pain equal of having electric drills through his eyes…and the nukes were right next to him. Not to mention that he actually succeeded to completely nullify the effects. And he was fine in moments (after taking another incredible pain when he channeled all the magnetic energies of the earth through him) and was able to battle top-notch condition Joseph and the X-men.