What is the setting of Little Earthquakes by Jennifer Weiner?

Little Earthquakes takes place in the present and is set mainly in Philadelphia, Pennsylvania. The first chapter opens with Lia sitting in the park in April shivering in her mother's blue down coat. The park will become a central meeting place for the four friends. They often arrange to meet in the park. They spend a lot of time there, taking walks, pushing the strollers, or sitting on the park benches talking.