US volcano hit by 450 earthquakes in 1 week
Yellowstone supervolcano in the US was hit with over 450 earthquakes in one week, including one measuring up to 4.5 on the Richter scale, scientists have confirmed. The tremors were likely a result of magma movement transferring strain between locations, scientists said. Although the tremors don't pose a risk, an eruption could cover the whole country in ash, scientists estimate.