WATCH: Video shows part of hillside still falling 1 month after Oso mudslide

OSO, Wash. -- A video taken by a geologist four weeks after the devastating Oso mudslide on March 22 shows big parts of the hillside still falling.

Geologists say it's normal for a hillside to shed some dirt and rocks as it stabilizes after a big slide.

The Oso mudslide killed 43 people.