It’s not an enormous moon relative to a few of its neighbors, however Jupiter’s Io is exceedingly energetic, with volcanoes by the lots of spewing lava plumes dozens of miles above its floor, per NASA. Infrared tech aboard the house company’s Juno probe mapped two such eruptions in February, returning beneficial information on the mysterious happenings beneath Io’s floor. Researchers shared their insights on the matter in a paper printed final week.
From round 2,400 miles away, the probe’s Jovian Infrared Auroral Mapper (JIRAM) instrument “revealed that the entire floor of Io is roofed by lava lakes contained in caldera-like options,” defined Alessandro Mura, a Juno co-investigator from Rome’s Nationwide Institute for Astrophysics. On Earth, a caldera is a crater fashioned by a collapsing volcano. Io is a couple of quarter the dimensions of Earth by diameter, and only a bit greater than Earth’s moon.
“Within the area of Io’s floor by which we have now essentially the most full information, we estimate about 3% of it’s coated by one in all these molten lava lakes,” mentioned Mura. Juno’s JIRAM software got here through Italy’s house company, Agenzia Spaziale Italiana.
Based on Mura, lead writer of the Io paper, the probe’s flybys expose the commonest kind of volcanism on Jupiter’s hottest moon — “huge lakes of lava the place magma goes up and down.”
He added, “The lava crust is pressured to interrupt towards the partitions of the lake, forming the everyday lava ring seen in Hawaiian lava lakes. The partitions are doubtless lots of of meters excessive, which explains why magma is usually not noticed spilling out.”
Researchers are nonetheless poring over the information collected by Juno’s Io flybys, which occurred in February 2024 and December 2023.
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