Mawson Peak

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Mapa Austrálie a Oceánie

ISS018-E-038182 lrg.jpg
Heard Island is located in the southern Indian Ocean, approximately 1,550 kilometers (963 miles) north of Antarctica. The island is a visible part of the Kerguelen Plateau, a submerged feature on the seafloor. The plateau was formed when large amounts of volcanic rock erupted over a geologically short time period. (When large amounts of volcanic rock erupt beneath the ocean from processes other than seafloor spreading, geologists refer to them as large igneous provinces.) Most of Heard Island is formed from volcanic rocks associated with the Big Ben stratovolcano. The northeastern slopes of the volcano are visible in shadow at the lower right of this detailed astronaut photograph.

Recent volcanic activity at Heard Island has occurred at 2,745-meter (9,006-foot) Mawson Peak, which sits within a breached caldera on the southwestern side of the Big Ben Volcano. Calderas form when a magma chamber beneath a volcano empties and collapses. The shadow cast by Mawson Peak points directly to the crescent-shaped caldera rim. Detailed geologic study of Big Ben Volcano is complicated by the presence of several glaciers, including Gotley and Lied Glaciers on the southwestern slopes. This image, taken during Southern Hemisphere summer, also reveals non-glaciated volcanic rock (light to dark brown) on either side of Gotley Glacier.

ISS Crew Earth Observations: ISS018-E-038182

Identification
Mission	ISS018 (Expedition 18)
Roll	E
Frame	038182
Country or Geographic Name	ANTARCTICA
Features	S.W. AREA OF HEARD I., MAWSON PEAK, FREMANTLE PEAK
Center Point Latitude	-53.1° N
Center Point Longitude	73.5° E
Camera
Camera Tilt	36°
Camera Focal Length	800 mm
Camera	Nikon D2Xs
Film	4288 x 2848 pixel CMOS sensor, RGBG imager color filter.
Quality
Percentage of Cloud Cover	0-10%
Nadir What is Nadir?
Date	2009-02-28
Time	12:54:41
Nadir Point Latitude	-51.3° N
Nadir Point Longitude	71.9° E
Nadir to Photo Center Direction	Southeast
Sun Azimuth	271°
Spacecraft Altitude	197 nautical miles (365 km)
Sun Elevation Angle	11°
Orbit Number	2885

Indian Ocean laea relief location map.jpg
Autor: Uwe Dedering, Licence: CC BY-SA 3.0
Relief location map of Indian Ocean.

• Projection: Lambert azimuthal equal-area projection.
• Area of interest:

• N: 30.0° N
• S: -70.0° N
• W: 30.0° E
• E: 150.0° E

• Projection center:

• NS: -20.0° N
• WE: 90.0° E

• GMT projection: -JA90.0/-20.0/180/19.998266666666666c
• GMT region: -R-12.856058461183775/-43.848273739920856/151.50519408595028/33.22162400070504r
• GMT region for grdcut: -R-13.0/-78.0/193.0/34.0r
• Relief: SRTM30plus.
• Made with Natural Earth. Free vector and raster map data @ naturalearthdata.com.