N ASA’s Juno mission has captured the most powerful volcanic eruption ever recorded on Io, Jupiter’s highly active moon.Even by Io’s extreme standards—where more than 400 volcanoes ...

Io’s long-debated magma ocean may not exist. Juno spacecraft data reveals that tidal forces deform the moon differently than expected if a magma ocean were present. Instead, Io’s mantle appears mostly ...

Fresh magma has intruded into the Earth’s crust underneath Alaska’s Mount Spurr, 75 miles west of Anchorage, increasing the likelihood of an eruption within the near future, government ...