Humans weren’t the only ones in Southern California that felt the rattling 5.2-magnitude earthquake in San Diego County on Monday.
Elephants at the San Diego Zoo Safari Park in Escondido were filmed forming what’s known as an “alert circle” during the quake, quickly gathering and standing at attention while surrounding a smaller one in their group.
“This behavior, demonstrated here by Ndlula, Zuli, Mkhaya, Umngani, and Khosi, is a natural response to perceived threats that helps protect younger elephants and the herd as a whole,” the zoo said on social media, noting elephants are able to feel sounds through their feet.
The zoo added that the group “returned to business as usual” and were safe along with the rest of their animals after the quake.
There were no reports of injuries or major damage from the quake across the region.
More: Magnitude-5.2 earthquake rattles Southern California
This article originally appeared on Palm Springs Desert Sun: San Diego County earthquake: Elephants form ‘alert circle’ at zoo