One character is making a potion using a recipe from a book called "Love potions, charms and spells", written by Barlow and Straker. Those are the names of villains from Stephen King's "Salem's Lot".
The name of the lawyer that found Mona Klingerman (Emily Tennant)'s anesthesiology report is Stephen Dooling. Stephen Dooling is made up of parts of the names of the producers of Kingdom Hospital, Stephen King and Richard Dooling.
At several points during the earthquakes, you can see objects that should be shaking, standing still.