TVASHTAR AWAKENING (Apr. 2006)Integral-field spectrometer observations detected a powerful volcanic eruption at Tvashtar in April 2006. This eruption was likely the same as detected with the New Horizons spacecraft in Feb. 2007. Click on thumbnail for more information, references and images.

SPATIALLY RESOLVED SO ON IO (NOV. 2002)We scanned the NIRSPEC spectrometer across Io while the satellite was in eclipse (see next bullet). This way we obtained the first spatially resolved `map' of SO on Io. Click on thumbnail for more information, references and images.

AO OBSERVATIONS OF IO IN ECLIPSE (DEC. 2001)When Io is in eclipse (Jupiter's shadow), no sunlight is reflected of the satellite, and hence it cannot be used for wavefront sensing. Yet observations under such circumstances would reveal many volcanic hot spots. Click on thumbnail for more information, references and images.

SPECKLE IMAGES OF IO IN ECLIPSE (1998) Speckle images of Jupiter's satellite Io, while it was in Jupiter's shadow. Click on thumbnail for more information, references and images.

MASSIVE VOLCANIC ERUPTION AT SURT (2001) Keck Adaptive Optics images of Io obtained with the Keck telescope on 19, 20 and 22 February 2001 reveal hot spots and violent volcanic activity. Click on the thumbnail for more information, references and images.

KECK AO IMAGES OF IO AT KLM BANDS (2001) Keck Adaptive Optics images of Io at L (3.8 micron) and M (4.8 micron) bands were taken in December 2001. At these wavelengths the Sun is much less bright, so volcanic hot spots are easily recognized. Click on the thumbnail for more images, references and a movie.

DISCOVERY OF SO ON IO WHILE IN ECLIPSE (1999) We discovered a forbidden SO emission band complex on Io while the satellite was in eclipse. Click on thumbnail for more details and references.