HiRISE | Slope Streaks in Arabia Terra (ESP_080890

NASA/JPL-Caltech/UArizona

Slope Streaks in Arabia Terra
ESP_080890_1925 Science Theme: Composition and Photometry

This image shows numerous light-toned streaks that seem to flow along the ground surface. These streaks form when dust and possibly sand-sized particles avalanche downhill.

Tracing these slope streaks back to their apex, or narrow, triangular-shaped end reveals that these avalanches started within the sun-lit slopes at the tops of hills and ridges. This suggests that formation of these slope streaks may have been helped by the sun warming the ground surface and destabilizing small accumulations of dust and sand.

Written by: Chris Okubo (15 February 2024)

Acquisition date
29 October 2023

Local Mars time
15:44

Latitude (centered)
12.303°

Longitude (East)
22.280°

Spacecraft altitude
275.2 km (171.1 miles)

Original image scale range
55.5 cm/pixel (with 2 x 2 binning) so objects ~167 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
7.9°

Phase angle
46.9°

Solar incidence angle
54°, with the Sun about 36° above the horizon

Solar longitude
140.2°, Northern Summer

For non-map projected images
North azimuth: 97°
Sub-solar azimuth: 16.9°

JPEG
Black and white
map projected  non-map

IRB color
map projected  non-map

Merged IRB
map projected

Merged RGB
map projected

RGB color
non-map projected

JP2
Black and white
map-projected   (192MB)

IRB color
map-projected   (60MB)

JP2 EXTRAS
Black and white
map-projected (99MB)
non-map           (170MB)

IRB color
map projected (23MB)
non-map           (61MB)

Merged IRB
map projected (196MB)

Merged RGB
map-projected (186MB)

RGB color
non map           (58MB)

ADDITIONAL INFORMATION
B&W label
Color label
Merged IRB label
Merged RGB label
EDR products
HiView

NB
IRB: infrared-red-blue
RGB: red-green-blue
About color products (PDF)

Black & white is 5 km across; enhanced color about 1 km
For scale, use JPEG/JP2 black & white map-projected images

USAGE POLICY
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:
NASA/JPL-Caltech/UArizona

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.