Io: Evidence for Silicate Volcanism in 1986

  title={Io: Evidence for Silicate Volcanism in 1986},
  author={Torrence V. Johnson and Glenn J. Veeder and Dennis Matson and R. Hamilton Brown and Robert M. Nelson and David R. Morrison},
  pages={1280 - 1283}
Infrared observations of Io during the 1986 apparition of Jupiter indicate that a large eruptive event occurred on the leading side of Io on 7 August 1986, Universal Time. Measurements made at 4.8, 8.7, and 20 micrometers suggest that the source of the event was about 15 kilometers in radius with a model temperature of ∼900 Kelvin. Together with previously reported events, these measurements indicate that high-temperature volcanic activity on the leading side of Io may be more frequent than… 
High-temperature silicate volcanism on Jupiter's moon Io.
Infrared wavelength observations of Io by the Galileo spacecraft show that at least 12 different vents are erupting lavas that are probably hotter than the highest temperature basaltic eruptions on
Silicate Cooling Model Fits to Galileo NIMS Data of Volcanism on Io
Abstract The Near Infrared Mapping Spectrometer (NIMS) has obtained spectra of volcanoes on the surface of the jovian satellite Io. Fits to data using a silicate cooling model allow us to constrain
Extreme Volcanism on Jupiter’s Moon Io
Io (Figure 7.1) is the innermost of the four large Galilean satellites of Jupiter discovered by Galileo Galilei in 1610. Io’s mean radius (1821 km) and bulk density (3.53 g cm−3) are comparable to
Ground‐based observations of Io
Ground-based observations are providing new information about the volcanic phenomena at Io's surface. Thermal emission from lava can be seen routinely at infrared wavelengths. One result of recent
Io after Galileo
Volcanic Activity on Io during 1987{1992: 4.8-m Photometry
Over the past 6 years we have conducted an extensive monitoring program of Io at near infrared wavelengths, in order to determine the location, frequency, and duration of the volcanic activity on
Thermal models for basaltic volcanism on Io
We present a new model for the thermal emissions from active basaltic eruptions on Io. While our methodology shares many similarities with previous work, it is significantly different in that (1) it
Active Volcanism on Io as Seen by Galileo SSI
Abstract Active volcanism on Io has been monitored during the nominal Galileo satellite tour from mid 1996 through late 1997. The Solid State Imaging (SSI) experiment was able to observe many
Magmatic Differentiation of Io
Abstract If Io has been volcanically active through much of its history, it must be highly differentiated. We present an initial attempt to quantify the differentiation of the silicate portion of Io.
Active volcanism: Effusive eruptions
Io 's most remarkabl e characteristic is its active volcanism. Volcanic erupt ion s on Io co nsist of effus ion s of lava as long lava flows, as lava lake s, and as fire fountains , as well as explos


Volcanic Hotspots on Io: Stability and Longitudinal Distribution
Analysis of the first results of a program to determine the longitudinal distribution of volcanic activity on Jupiter's satellite Io suggests that the active volcanic regions observed by the Voyager experimenters are still active, particularly the region around the feature known as Loki.
Physics and Chemistry of Sulfur Lakes on Io
Infrared Observations of the Jovian System from Voyager 1
The infrared spectroscopy and radiometry investigation has obtained spectra of Jupiter and its satellites between approximately 180 and 2500 cm–1 with a spectral resolution of 4.3 cm–1. The Jupiter
Io: An Intense Brightening Near 5 Micrometers
Spectrophotometric observations of the jovian satellite Io on 20 and 21 February 1978 (Universal Time) found that the 5-micrometer albedo of Io is near unity under ordinary conditions, so the observed transient phenomenon must have been the result of an emission mechanism.
The role of SO2 in volcanism on Io
Io and Earth are the only planetary bodies known to be volcanically active; the energetics of the eruptive plumes on Io have important structural implications and are closely linked with the presence