Ison Gravitational Pull On Jupiter's Moon
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Major Volcanic Eruption Seen on Jupiter's Moon Io Recent observations of Jupiter's moon Io has revealed a massive volcanic eruption taking place 628,300,000 km (390,400,000 miles) from Earth. Io, the innermost of the four largest moons around Jupiter, is the most volcanically active object in the Solar System with about 240 active regions. But this new one definitely caught the eye of Dr. Imke de Pater, Professor of Astronomy and of Earth and Planetary Science at the University of California in Berkeley. She was using the Keck II telescope on Mauna Kea in Hawaii on August 15, 2013 when it immediately became apparent something big was happening at Io. "When you are right at the telescope and see the data, this is something you can see immediately, especially with a big eruption like that," de Pater told Universe Today via phone. de Pater said this eruption is one of the top 10 most powerful eruptions that have been seen on this moon. "It is a very energetic eruption that covers over a 30 square kilometer area," she said. "For Earth, that is big, and for Io it is very big too. It really is one of the biggest eruptions we have seen." She added the new volcano appears to have a large energy output. "We saw a big eruption in 2001, which was in the Surt region, which is well known as the biggest one anyone has ever seen," she said. "For this one, the total energy is less but per square meter, it is bigger than the one in 2001, so it is very powerful." While Io's eruptions can't be seen directly from Earth,infrared cameras on the Keck telescope (looking between 1 and 5 microns) have been able to ascertain there are likely fountains of lava gushing from fissures in the Rarog Patera region of Io, aptly named for a Czech fire deity. While many regions of Io are volcanically active, de Pater said she's not been able to find any other previous activity that has been reported in the Rarog Patera area, which the team finds very interesting. http://www.universetoday.com/104317/major-volcanic-eruption-seen-on-jupi...