פירוש על ברכות 117:13

RAVA SAID: THERE, ONE RECITES: BLESSED…WHOSE POWER FILLS THE WORLD, AND: AUTHOR OF CREATION. The explanation: he says this one, “His power and might fill the world” or that one, “Who makes the works of creation”, whichever he wants, not both, and so did Rav Alfas explain Rovo’s opinion.

I.e. created.

This is explained by Raba's statement which follows.

Mountains and hills are stationary and in fixed places, whereas thunder, etc. occur throughout the world.