A herd of bison was caught on video racing through Yellowstone National Park days before a magnitude 4.8 earthquake struck the area.
According to USA Today, it's unclear whether the bison were fleeing from a potentially dangerous zone of the park, which is situated right on top of one of the world's largest super-volcanoes.
Some park experts have said that the animals sensed an imminent eruption, and fled the region for safer lands.
Others wagered the bison were simply running in a herd, USA Today reported.
The video was first posted by YouTube user Leo Leckie on March 14. In the description, Leckie described the procession as an annual event.
"This herd of Yellowstone National Park Bison dashes from Mammoth Hot Springs eastward along the roadway and deeper into the park," Leckie wrote. "I've been lucky enough to live and work here year-round in Yellowstone National Park since 2010, and every spring I am blessed to witness them running...in a celebration of life, in a celebration of the coming richness of the spring season."
About 14 days after Leckie spied the bison dashing through the park, a magnitude 4.8 earthquake rattled Yellowstone - the biggest shake recorded in the area since February 1980.
No injuries were reported, and no damage was done to the park. Yellowstone's northwest region was hit the hardest by the quake - one of a few other, smaller tremors that struck the area the previous week.
According to a statement released by geologists at the University of Utah Seismograph Stations, the earthquake hit Yellowstone at about 6:34 a.m. on March 31, close to the Norris Geyser Basin.
Residents felt the earthquake - largely regarded as a small shake by officials - in a small Montana town about 23 miles away from Yellowstone, Reuters reported at the time.
