The Steamboat Geyser erupted twice in quick succession, which had some worried. Scientists at the US Geological Survey (USGS) reported an eruption on June 12, and just three days later on June 15 it blew again. Volcanologist Janine Krippner tweeted: “ Yellowstone has an incredible geyser system that is unrelated to magmatic activity – other than the magmatic system basically providing heat.”

Geysers like Old Faithful and Steamboat erupt whenever water and steam get trapped in a tight spot deep below the geyser’s blowhole.

The mix of water and steam builds in pressure until it finds its way to the surface where a tall stream of scorching hot water blasts hundreds of feet in the sky.

Steamboat Geyser roared back into life in April 2017, with the first triple eruption in 15 years, sparking interest from the scientific community.

Experts will continue to analyse the geyser to see if they indicate any sort of impending eruption for Yellowstone.