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© WGALScale
Three more earthquakes were reported in the Dillsburg, York County, area over the weekend.

Earthquake experts said that they all happened within a six-minute period at about 7:20 a.m. Sunday.

The first tremor was a magnitude 2.8, the second was a 1.8 and the third was a 2.6.

Some residents said that the quakes shook pictures on their walls.

"This time they are precipitated by a lot of rumbling and rolling we are hearing. So, we knew another was coming and in fact it did," said resident Candace LaGaza.

There have been more than 600 earthquakes in the area in the past year.

Earthquake experts just finished a study that showed underground rocks are clashing and creating the quakes.