Open AccessGround‐based observations of volcanism on Io in 1999 and early 2000
Author(s) -
Howell Robert R.,
Spencer John R.,
Goguen Jay D.,
Marchis Franck,
Prangé Renée,
Fusco Thierry,
Blaney Diana L.,
Veeder Glenn J.,
Rathbun Julie A.,
Orton Glenn S.,
Grocholski Aaron J.,
Stansberry John A.,
Kanner Gary S.,
Hege E. Keith
Publication year - 2001
Publication title -
journal of geophysical research: planets
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/2000je001382
Subject(s) - volcanism , geology , volcano , brightness , astrobiology , period (music) , astronomy , geophysics , seismology , physics , tectonics , acoustics
Ground‐based observations of volcanism on Io during the period of the 1999 and early 2000 Galileo close flybys have detected several types of activity, providing information which complements the spacecraft observations. At Loki a brightening began between August 25 and September 9 and continued through February. On August 2 a major outburst was observed near (14°N, 74°W) whose brightness corresponds to an area of approximately 350 km 2 at a temperature of 1100 K. Observations of eruptions in late June (9906A) and in late November (9911A, at Tvashtar) provide temporal and photometric constraints on activity also seen by Galileo. High‐resolution adaptive optics images provide further information on the fainter sources distributed across the surface.