Power problems plagued SEPTA's Regional Rail lines during the Friday morning commute.

Riders faced delays of up to an hour and a half on all lines at one point, the transit agency said. By early afternoon, delays were down to about 15 minutes and normal boarding had resumed at all stations.

The delays were due to power issues at the Fern Rock Transportation Center.

Problems first affected the Lansdale/Doylestown, West Trenton, Warminster and Glenside Combined Lines about 7:30 a.m. Friday, but the delays rippled throughout the Regional Rail system as the morning progressed.

Riders between Jenkintown and the Fern Rock Transportation Center were especially hard hit, facing shuttle buses and single-tracking for the bulk of the morning..

More information is on the agency's website and Twitter account.