The Positives and Negatives of Fissure Eruptions
NASA/JPL-Caltech/UArizona
The Positives and Negatives of Fissure Eruptions
ESP_083598_1780  Science Theme: Volcanic Processes
This image shows fissures on a small shield volcano that sits east of the much larger Tharsis Montes volcanoes. Fissure eruptions are very common on Earth. On Mars, numerous fissure eruptions appear throughout the youngest volcanic terrains, although no active eruptions have been observed yet.

Fissures on Mars are often distinguished as being linear (negative-relief) troughs or depressions such as this one (marked A in the cutout). Its edges appear raised, but that may be due to thick accumulations of wind-blown dust. Just to the south is a much narrower fissure (B) that is parallel to A but appears to be slightly raised (positive relief) with erupted material to either side. B could have been very much like the fissure eruptions that have occurred recently in Iceland and Hawaii.

Written by: Sarah Sutton  (18 September 2024)


This is a stereo pair with ESP_083321_1780.
 
Acquisition date
27 May 2024

Local Mars time
15:15

Latitude (centered)
-2.044°

Longitude (East)
253.948°

Spacecraft altitude
259.7 km (161.4 miles)

Original image scale range
from 28.8 cm/pixel (with 1 x 1 binning) to 57.6 cm/pixel (with 2 x 2 binning)

Map projected scale
25 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
26.4°

Phase angle
29.4°

Solar incidence angle
52°, with the Sun about 38° above the horizon

Solar longitude
263.1°, Northern Autumn

For non-map projected images
North azimuth:  96°
Sub-solar azimuth:  332.8°
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All of the images produced by HiRISE and accessible on this site are within the public domain: there are no restrictions on their usage by anyone in the public, including news or science organizations. We do ask for a credit line where possible:
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POSTSCRIPT
NASA’s Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, Calif., manages the Mars Reconnaissance Orbiter for NASA’s Science Mission Directorate, Washington. The HiRISE camera was built by Ball Aerospace and Technology Corporation and is operated by the University of Arizona.