"Ghosts in the Walls" by Shannon Peavey appeared in Daily Science Fiction on May 30, 2013. "A woman is driven insane by the cries of a baby emanating from inside a wall in her apartment."
Earthquakes occur constantly throughout the story without explanation. The setting is unclear. It is also unclear if only the MC hears the baby crying or if others hear it too. The ending wants some explanation as well. 2 out of 7 rocket-dragons.