Less than six months after it opened to the public, Penn Station’s West End Concourse is already plagued by problems, the New York Post reports. Several cracks have appeared in the concourse’s terrazzo flooring, with one commuter noting to the Post, that it appeared as though an earthquake had hit the concourse.

Before its opening in June last year, the concourse’s opening had already been delayed. Originally it was set to open in the fall of 2016, but that was pushed back to spring 2017 due to several tech-focussed upgrades at the station. It finally opened in June.

The development of the West End Concourse is part of the overall $1.6B billion revamp of Penn Station, which includes the conversion of the James A. Farley Post Office building into the Moynihan Train Hall.

The $300 million underground concourse connects Penn Station to the post office building. A spokesperson for Empire State Development told the Post that the “non-structural cracks” had appeared to due to extreme weather conditions, and that the cracks were being repaired immediately at no cost to the state. Head on over to the Post to check out images of the cracks.