Slope Streaking
NASA/JPL/University of Arizona
Slope Streaking
ESP_057080_1915  Science Theme: Mass Wasting Processes
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We have been monitoring the slope streaks on this hill for several years. There are definitive changes between this September 2018 image and a previous one in December 2016. Earlier streaks have since faded and new, darker streaks are visible. These streaks are tens of meters wide.

These features are small avalanches of dust and sand from the hillsides. The surface dust is lighter in color, but when it avalanches away, it reveals underlying larger-grained sand particles that are much darker. Over time, the dust slowly rains down from the atmosphere and the streaks fade as they are coated with dust.

Written by: Ross Beyer  (10 December 2018)
 
Acquisition date
30 September 2018

Local Mars time
14:46

Latitude (centered)
11.357°

Longitude (East)
180.996°

Spacecraft altitude
277.9 km (172.7 miles)

Original image scale range
55.6 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
1.5°

Phase angle
53.3°

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

Solar longitude
259.8°, Northern Autumn

For non-map projected images
North azimuth:  96°
Sub-solar azimuth:  324.2°
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   (224MB)

IRB color
map-projected   (106MB)

JP2 EXTRAS
Black and white
map-projected  (97MB)
non-map           (128MB)

IRB color
map projected  (39MB)
non-map           (130MB)

Merged IRB
map projected  (253MB)

Merged RGB
map-projected  (233MB)

RGB color
non map           (123MB)
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/University of Arizona

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.