No one was injured when a car hit a 6-foot-by-8-foot rock that fell from cliffs next to the Seward Highway late Wednesday.
Authorities warned that drivers should use caution in the area due to the potential for additional rockslides.
Rockfall along the Seward Highway near Beluga Point has been happening since wind and rain battered the area earlier this week.
Officials cited rockfall danger and traffic hazards created by people stopping to fill containers.
The highway closed after rocks covered the northbound lane at mile 111, near McHugh Creek. A second rock slide was reported near mile 106.5.
State transportation workers found wet ground may have contributed to the small landslide, despite the lack of recent rain.
Temperatures in the area were unseasonably high last week, reaching into the mid-40s, according to the National Weather Service. Then temperatures dropped below freezing Sunday and into Monday morning. "There's a lot of water flowing underground in this area," McCarthy said. The freeze-thaw "caused some instability and that made it slide."
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