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The Gateway to Astronaut Photography of Earth
(NASA Crew Earth Observations)
Astronaut Photography of Earth - Display Record
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IdentificationMission: ISS038 Roll: E Frame: 35123 Mission ID on the Film or image: ISS038
Country or Geographic Name: NICARAGUA
Features: APOYEQUE VOLCANO, CHILTEPE PENINSULA, XILOA LAKE, LAKE MANAGUA
Center Point: Latitude: 12.2 Longitude: -86.3 (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:
CameraCamera Tilt: 30
Camera Focal Length: 1000mm
Camera: N4: Nikon D3X
Film: 6048E : 6048 x 4032 pixel CMOS sensor, 35.9mm x 24.0mm, total pixels: 25.72 million, Nikon FX format.
Percentage of Cloud Cover: 10 (0-10)
GMT Date: 20140121 (YYYYMMDD) GMT Time: 161505 (HHMMSS)
Nadir Point Latitude: 10.1, Longitude: -86.9 (Negative numbers indicate south for latitude and west for longitude)
Nadir to Photo Center Direction: North
Sun Azimuth: 139 (Clockwise angle in degrees from north to the sun measured at the nadir point)
Spacecraft Altitude: 225 nautical miles (417 km)
Sun Elevation Angle: 51 (Angle in degrees between the horizon and the sun, measured at the nadir point)
CaptionsApoyeque Volcano, Nicaragua
Note: This caption refers to the image versions labeled "NASA's Earth Observatory web site".
The Chiltepe Peninsula, highlighted in this astronaut photograph from the International Space Station, extends into Lake Managua in west-central Nicaragua. The peninsula is formed from part of a large ignimbrite shield, a geologic structure created by deposition of primarily low density materials (such as pumice) ejected during violent, explosive eruptive activity. Ignimbrite deposits are most commonly emplaced during large pyroclastic flows – gravity-driven mixtures of rock, ash, and volcanic gases that can cover 100s of kilometers at speeds of 100s of kilometers per hour – with ignimbrite shields formed over geologic time by successive flows.
The Apoyeque caldera, filled with a 2.8 km wide and 400 meter deep lake, dominates the center of the peninsula. Geological evidence indicates that Apoyeque last erupted around 50 BCE (plus or minus 100 years). The Laguna Xiloa maar – a volcanic crater formed by the explosive interaction of magma and groundwater – is located immediately to the southeast of Apoyeque and is also filled with a lake. Laguna Xiloa last erupted approximately 6100 years ago.
More recently, a swarm of small earthquakes was detected near Apoyeque in 2012. These seismic swarms, when detected in volcanically active areas, may indicate movement of magma prior to an eruption. The capital city of Managua, not visible in the image, is located approximately 15 kilometers to the southeast of Apoyeque, while the town of Bosques de Xiloa is considerably closer (approximately 4 km).
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Recommended Citation: Earth Science and Remote Sensing Unit, NASA-Johnson Space Center. "The Gateway to Astronaut Photography of Earth." .