As New Horizons makes its closest approach to Jupiter, we are already seeing considerable activity from a volcano known as Tvashtar. This comes of no surprise as this was detected a few weeks back when scientists maintained observations of Io through the Hubble Space Telescope in preparation for this event. This is already the best image of an active volcano eruption on Io since the Voyager flybys in 1975 (revealed through over-exposure). Details here are somewhat greater than those taken by Galileo or Cassini and are expected to only get better before all the data is in.