DESCRIPTION AND
DATA SHEET

Euboea Montes
Io, Jupiter

Euboea Montes is featured in this Voyager 1 view of Io, a large rocky satellite of Jupiter. Euboea Montes is 200 kilometers long and roughly 11 kilometers high, and is the tallest mountain discovered to date on Io.

Euboea Montes consists of three sections. The southeast slope features a steep scarp with numerous steps. The northwest face is smooth and slopes gently to the northwest. At the base of this smooth slope is a 4-kilometer-thick ridged deposit.

The tilted northwest face of Euboea Montes suggests that the mountain formed when a large block of Io's crust was uplifted and tilted toward the northwest. The ridged deposit probably formed when part of the mountain gave way and slid off the smooth northwest face. This massive debris slide formed the thick ridged deposit at the base of the northwest slope. This deposit may be the largest landslide in the solar system, with the possible exception of the Olympus Mons aureoles on Mars (which may or may not be landslide deposits).

Adjacent to Euboea Montes is Creidne Patera, a 170-kilometer-long volcanic caldera. Dark lava flows partially cover the floor of Creidne Patera. Voyager 1 detected thermal radiation from Creidne Patera, suggesting that these flows may have been active at the time (1979). Bright deposits surrounding Creidne Patera may be sulfur dioxide frosts.

(The "natural" color of Io is a greenish yellow. The colors shown here are real but are enhanced. They are also altered by the stereo display.)

Location:
     48.0 S, 335.0 W
Quadrangle:
     Ji-2 (Ruwa Patera)
Mission:
     Voyager 1
Image Numbers:
     16390.38, 16392.59
Image Resolution
(Full-Sized View):
     848 meters/pixel
Image Width:
     650 kilometers
Vertical Exaggeration:
     7.2 × Normal
Vertical Resolution:
     252 meters
Spacecraft Altitude:
     108,250 kilometers
Convergence Angle:
     49°