University of California, Berkeley | 2016 Oct 20
[img3="All hot spots detected from August 2013 through December 2015 are shown on a full map of Io, illustrating the approximate length of time they were visible. Each circle represents a new detection; the size of the circle corresponds logarithmically to the intensity, and more opaque regions are where a hot spot was detected multiple times. The color and symbol indicate the type of eruption, following the legend.Jupiter’s moon Io continues to be the most volcanically active body in the solar system, as documented by the longest series of frequent, high-resolution observations of the moon’s thermal emission ever obtained.
Credit: Katherine de Kleer and Imke de Pater, UC Berkeley)"]https://news.berkeley.edu/wp-content/up ... atdist.jpg[/img3][hr][/hr]
Using near-infrared adaptive optics on two of the world’s largest telescopes -- the 10-meter Keck II and the 8-meter Gemini North, both located near the summit of the dormant volcano Maunakea in Hawaii -- University of California, Berkeley, astronomers tracked 48 volcanic hotspots on the surface over a period of 29 months from 2013 through the end of 2015.
Without adaptive optics -- a technique that removes the atmospheric blur to sharpen the image -- Io is merely a fuzzy ball. Adaptive optics can separate features just a few hundred kilometers apart on Io’s 3,600-kilometer diameter surface. ...
Time variability of Io's volcanic activity from near-IR adaptive optics
observations on 100 nights in 2013–2015 - Katherine de Kleer, Imke de Pater
- Icarus 280:378 (Dec 2016) DOI: 10.1016/j.icarus.2016.06.019
observations on 100 nights in 2013–2015 - Katherine de Kleer, Imke de Pater
- Icarus 280:405 (Dec 2016) DOI: 10.1016/j.icarus.2016.06.018