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Photographing the Earth from the International Space Station

Astronaut Photography of Earth - Display Record

ISS016-E-34524

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File NameFile Size (bytes)WidthHeightAnnotatedCroppedPurposeComments
View ISS016-E-34524.JPG 65362639435 No No
View ISS016-E-34524.JPG 256130540341 Yes Yes NASA's Earth Observatory web site
View ISS016-E-34524.JPG 7276841000631 No Yes NASA's Earth Observatory web site
View ISS016-E-34524.JPG 104036930322064 No No

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Electronic Image Data

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Identification

Mission: ISS016 Roll: E Frame: 34524 Mission ID on the Film or image: ISS016
Country or Geographic Name: SAUDI ARABIA
Features: VOLCANIC FIELD, LAVA FLOWS
Center Point: Latitude: 25.7 Longitude: 40.0 (Negative numbers indicate south for latitude and west for longitude)

Stereo: (Yes indicates there is an adjacent picture of the same area)
ONC Map ID: JNC Map ID:

Camera

Camera Tilt: 15
Camera Focal Length: 400mm
Camera: E4: Kodak DCS760C Electronic Still Camera
Film: 3060E : 3060 x 2036 pixel CCD, RGBG array.

Quality

Film Exposure:
Percentage of Cloud Cover: 10 (0-10)

Nadir

GMT Date: 20080331 (YYYYMMDD) GMT Time: 135518 (HHMMSS)
Nadir Point Latitude: 25.9, Longitude: 40.8 (Negative numbers indicate south for latitude and west for longitude)

Nadir to Photo Center Direction: West
Sun Azimuth: 265 (Clockwise angle in degrees from north to the sun measured at the nadir point)
Spacecraft Altitude: 181 nautical miles (335 km)
Sun Elevation Angle: 21 (Angle in degrees between the horizon and the sun, measured at the nadir point)
Orbit Number: 1628

Captions

Harrat Khaybar, Saudi Arabia

The western half of the Arabian peninsula contains not only large expanses of sand and gravel, but extensive lava fields known as haraat (harrat for a named field). One such field is the 14,000 km2 Harrat Khaybar, located approximately 137 km to the northeast of the city of Al Madinah (Medina). The volcanic field was formed by eruptions along a 100-km long north-south linear vent system over the past 5 million years; the most recent recorded eruption took place between 600 - 700 A.D.

Harrat Khaybar contains a wide range of volcanic rock types and spectacular landforms, several of which are represented in this astronaut photograph. Jabal al Qidr is built from several generations of dark, fluid basalt lava flows; the flows surround the 322 –meter high stratovolcano (Jabal is translated as “mountain” in Arabic). Jabal Abyad, in the center of the image, was formed from a more viscous, silica-rich lava classified as a rhyolite. While Jabal al Qidr exhibits the textbook cone shape of a stratovolcano, Jabal Abyad is a lava dome – a rounded mass of thicker, more solidified lava flows. To the west (image top center) is the impressive Jabal Bayda’. This symmetric structure is a tuff cone, formed by eruption of lava in the presence of water. This leads to the production of wet, sticky pyroclastic deposits that can build a steep cone structure, particularly if the deposits consolidate quickly.

White deposits visible in the crater of Jabal Bayda’ (and two other locations to the south) are formed from sand and silt that accumulate in shallow, protected depressions. The presence of tuff cones – together with other volcanic features indicative of water - in the Harrat Khaybar suggest that the local climate was much wetter during some periods of volcanic activity. Today, however, the regional climate is hyperarid – little to no yearly precipitation - leading to an almost total lack of vegetation.


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