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Images of Indonesia from December 26, 2004 and 2005
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Earthquake Spawns Tsunamis
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Earthquake Spawns Tsunamis |
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The true-color image above shows an inlet of Little Andaman Island, near the village of Kwate-tu-Kwage. Little Andaman Island is part of India?s Andaman Island chain, situated in the eastern Indian Ocean roughly 965 km (600 miles) south-southeast of Bangladesh. The image shows a swath of destruction (grayish patches) just inland from the beach as buildings and houses were damaged or swept away by surging seawater. The image was acquired on January 2, 2005, by the IKONOS satellite. On December 26, 2004, a magnitude 9.0 earthquake hit off the west coast of Sumatra, [ http://earthobservatory.nasa.gov/NaturalHazards/natural_hazards_v2.php3?img_id=12640 ] Indonesia, sending shockwaves and tsunamis radiating out from the epicenter. [ http://earthobservatory.nasa.gov/NaturalHazards/natural_hazards_v2.php3?img_id=12645 ] According to news reports, as of January 2, 2005, no relief aid has been sent to the Andaman and Nicobar Islands and little is currently known about the extent of the damage and loss of life there. Although this scene is partly obscured by a thin cloud overhead, many striking details can be seen in the full-resolution copy. A dark crescent of standing water can be seen to the west (left) of the village?possibly the remnants of the tsunami. The image also reveals tsunami destruction to structures along the coast and damage fairly far inland as well. In some cases structures have been ripped off foundations, which is especially noticeable near the inlet. Image copyright Space Imaging [ http://www.spaceimaging.com/ ] |
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Earthquake Spawns Tsunamis
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Earthquake Spawns Tsunamis |
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Satellites continue to acquire imagery of areas severely damaged by the tsunami of December 26, 2004. This image of Meulaboh, Indonesia, was collected on January 7, 2005, by DigitalGlobe?s [ http://www.digitalglobe.com/ ] QuickBird satellite. Meulaboh is located on the coast of Sumatra, roughly 150 kilometers (93 miles) from the epicenter of the magnitude 9.0 earthqukae that generated the tsunami. The image shows where the tsunami washed over a narrow peninsula, eroding the beach and destroying many of the town?s buildings. Image copyright DigitalGlobe [ http://www.digitalglobe.com/ ] |
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Earthquake Spawns Tsunamis
| Title |
Earthquake Spawns Tsunamis |
| Description |
Satellites continue to acquire imagery of areas severely damaged by the tsunami of December 26, 2004. This image of Meulaboh, Indonesia, was collected on January 7, 2005, by DigitalGlobe?s [ http://www.digitalglobe.com/ ] QuickBird satellite. Meulaboh is located on the coast of Sumatra, roughly 150 kilometers (93 miles) from the epicenter of the magnitude 9.0 earthqukae that generated the tsunami. The image shows where the tsunami washed over a narrow peninsula, eroding the beach and destroying many of the town?s buildings. Image copyright DigitalGlobe [ http://www.digitalglobe.com/ ] |
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Earthquake Spawns Tsunamis
| Title |
Earthquake Spawns Tsunamis |
| Description |
Satellites continue to acquire imagery of areas severely damaged by the tsunami of December 26, 2004. This image of Meulaboh, Indonesia, was collected on January 7, 2005, by DigitalGlobe?s [ http://www.digitalglobe.com/ ] QuickBird satellite. Meulaboh is located on the coast of Sumatra, roughly 150 kilometers (93 miles) from the epicenter of the magnitude 9.0 earthqukae that generated the tsunami. The image shows where the tsunami washed over a narrow peninsula, eroding the beach and destroying many of the town?s buildings. Image copyright DigitalGlobe [ http://www.digitalglobe.com/ ] |
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Earthquake Spawns Tsunamis
| Title |
Earthquake Spawns Tsunamis |
| Description |
On December 26, 2004, a large (magnitude 9.0) earthquake occurred off the western coast of Sumatra in the Indian Ocean. The earthquake was caused by the release of stresses accumulated as the Burma tectonic plate overrides the India tectonic plate. Movement of the seafloor due to the earthquake generated a tsunami, or seismic sea wave, that affected coastal regions around the Indian Ocean. The northwestern Sumatra coastline in particular suffered extensive damage and loss of life. These astronaut photographs illustrate damage along the southwestern coast of Aceh Province in the vicinity of the city of Lho? Kruet, Indonesia. Large areas of bare and disturbed soil (brownish gray) that were previously covered with vegetation are visible along the coastline in the near-nadir (top) image. Embayments in the coastline were particularly hard hit, while adjacent headlands were less affected. The oblique (lower) astronaut photograph was acquired 45 seconds after the near-nadir photograph, and captures sunglint illuminating the Indian Ocean and standing water inland (light gray, yellow). Distortion and scale differences in the images are caused by increased obliquity of the view from the International Space Station. Arrows on the photographs indicate several points of comparison between the two images. Standing bodies of seawater may inhibit revegetation of damaged areas and act as sources of salt contamination in soil and groundwater. Astronaut photographs ISS010-E-13079 [ http://eol.jsc.nasa.gov/scripts/sseop/photo.pl?mission=ISS010&roll=E&frame=13079 ] (top) and ISS010-E-13088 [ http://eol.jsc.nasa.gov/scripts/sseop/photo.pl?mission=ISS010&roll=E&frame=13088 ] (bottom) were acquired January 15, 2005 with a Kodak 760C digital camera using a 400 mm lens, and are provided by the ISS Crew Earth Observations experiment and the Image Science & Analysis Group, Johnson Space Center. The International Space Station Program [ http://spaceflight.nasa.gov/home/index.html ] supports the laboratory to help astronauts take pictures of Earth that will be of the greatest value to scientists and the public, and to make those images freely available on the Internet. Additional images taken by astronauts and cosmonauts can be viewed at the NASA/JSC Gateway to Astronaut Photography of Earth. [ http://eol.jsc.nasa.gov/ ] |
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Earthquake Spawns Tsunamis
| Title |
Earthquake Spawns Tsunamis |
| Description |
On December 26, 2004, a large (magnitude 9.0) earthquake occurred off the western coast of Sumatra in the Indian Ocean. The earthquake was caused by the release of stresses accumulated as the Burma tectonic plate overrides the India tectonic plate. Movement of the seafloor due to the earthquake generated a tsunami, or seismic sea wave, that affected coastal regions around the Indian Ocean. The northwestern Sumatra coastline in particular suffered extensive damage and loss of life. These astronaut photographs illustrate damage along the southwestern coast of Aceh Province in the vicinity of the city of Lho? Kruet, Indonesia. Large areas of bare and disturbed soil (brownish gray) that were previously covered with vegetation are visible along the coastline in the near-nadir (top) image. Embayments in the coastline were particularly hard hit, while adjacent headlands were less affected. The oblique (lower) astronaut photograph was acquired 45 seconds after the near-nadir photograph, and captures sunglint illuminating the Indian Ocean and standing water inland (light gray, yellow). Distortion and scale differences in the images are caused by increased obliquity of the view from the International Space Station. Arrows on the photographs indicate several points of comparison between the two images. Standing bodies of seawater may inhibit revegetation of damaged areas and act as sources of salt contamination in soil and groundwater. Astronaut photographs ISS010-E-13079 [ http://eol.jsc.nasa.gov/scripts/sseop/photo.pl?mission=ISS010&roll=E&frame=13079 ] (top) and ISS010-E-13088 [ http://eol.jsc.nasa.gov/scripts/sseop/photo.pl?mission=ISS010&roll=E&frame=13088 ] (bottom) were acquired January 15, 2005 with a Kodak 760C digital camera using a 400 mm lens, and are provided by the ISS Crew Earth Observations experiment and the Image Science & Analysis Group, Johnson Space Center. The International Space Station Program [ http://spaceflight.nasa.gov/home/index.html ] supports the laboratory to help astronauts take pictures of Earth that will be of the greatest value to scientists and the public, and to make those images freely available on the Internet. Additional images taken by astronauts and cosmonauts can be viewed at the NASA/JSC Gateway to Astronaut Photography of Earth. [ http://eol.jsc.nasa.gov/ ] |
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North Reef Island, Andaman S
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North Reef Island, Andaman Sea |
| Description |
On December 26, 2004, one of the largest earthquakes in recorded history struck offshore of the island of Sumatra, Indonesia. The ocean floor heaved in some places and sank in others, creating catastrophic tsunamis that raced across the Indian Ocean. Hundreds of thousands of people died as the waves struck coastlines from Thailand to Sri Lanka to Somalia. In addition to tsunami damage, satellite images of reefs, islands, and coastlines identified signs of permanent elevation changesinking or upliftalong the fault between the Indo-Australia and Burma plates. [ http://earthobservatory.nasa.gov/NaturalHazards/natural_hazards_v2.php3?img_id=12640 ] In places such as North Reef Island, shown in this pair of images from the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) [ http://asterweb.jpl.nasa.gov ] on NASA's Terra [ http://terra.nasa.gov ] satellite, the quake lifted the reefs permanently out of the water. The images use visible and infrared light detected by ASTER to make different land surfaces stand out clearly from one another: water is blue, vegetation is red, coral or bare sand appears white. In the "before" image, from December 2, 2004, the submerged reef creates a bright blue glow around the island. In the "after" image, from February 4, 2005, the white coral stands completely up out of the water. It is even tinged with red, which suggests the exposed coral had died, and algae had colonized it. In the weeks and months after the earthquake, satellite images provided broad coverage of an area where ground-based observations were initially very limited. A team of scientists led by Caltech Ph.D. geology student Aron Meltzner discovered changes in elevation along nearly 1,600 kilometers (994 miles) of the tectonic plate boundary. The images revealed that the earthquake rupture extended 100 kilometers (62 miles) farther north than estimates based on seismic and Global Positioning System (GPS) data suggested. The feature article Rise and Fall: Satellites Reveal Full Length of Tsunami-Generating Earthquake [ http://earthobservatory.nasa.gov/Study/Aceh/aceh.html ] describes how scientists used satellite images to map the length of the earthquake rupture zone. The article includes additional satellite and ground-based images of elevation changes resulting from the 2004 Aceh-Andaman earthquake. NASA images created by Jesse Allen, Earth Observatory, using data provided courtesy of the NASA/GSFC/MITI/ERSDAC/JAROS, and U.S./Japan ASTER Science Team. [ http://asterweb.jpl.nasa.gov/ ] |
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North Reef Island, Andaman S
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| Title |
North Reef Island, Andaman Sea |
| Description |
On December 26, 2004, one of the largest earthquakes in recorded history struck offshore of the island of Sumatra, Indonesia. The ocean floor heaved in some places and sank in others, creating catastrophic tsunamis that raced across the Indian Ocean. Hundreds of thousands of people died as the waves struck coastlines from Thailand to Sri Lanka to Somalia. In addition to tsunami damage, satellite images of reefs, islands, and coastlines identified signs of permanent elevation changesinking or upliftalong the fault between the Indo-Australia and Burma plates. [ http://earthobservatory.nasa.gov/NaturalHazards/natural_hazards_v2.php3?img_id=12640 ] In places such as North Reef Island, shown in this pair of images from the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) [ http://asterweb.jpl.nasa.gov ] on NASA's Terra [ http://terra.nasa.gov ] satellite, the quake lifted the reefs permanently out of the water. The images use visible and infrared light detected by ASTER to make different land surfaces stand out clearly from one another: water is blue, vegetation is red, coral or bare sand appears white. In the "before" image, from December 2, 2004, the submerged reef creates a bright blue glow around the island. In the "after" image, from February 4, 2005, the white coral stands completely up out of the water. It is even tinged with red, which suggests the exposed coral had died, and algae had colonized it. In the weeks and months after the earthquake, satellite images provided broad coverage of an area where ground-based observations were initially very limited. A team of scientists led by Caltech Ph.D. geology student Aron Meltzner discovered changes in elevation along nearly 1,600 kilometers (994 miles) of the tectonic plate boundary. The images revealed that the earthquake rupture extended 100 kilometers (62 miles) farther north than estimates based on seismic and Global Positioning System (GPS) data suggested. The feature article Rise and Fall: Satellites Reveal Full Length of Tsunami-Generating Earthquake [ http://earthobservatory.nasa.gov/Study/Aceh/aceh.html ] describes how scientists used satellite images to map the length of the earthquake rupture zone. The article includes additional satellite and ground-based images of elevation changes resulting from the 2004 Aceh-Andaman earthquake. NASA images created by Jesse Allen, Earth Observatory, using data provided courtesy of the NASA/GSFC/MITI/ERSDAC/JAROS, and U.S./Japan ASTER Science Team. [ http://asterweb.jpl.nasa.gov/ ] |
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Uplift and Subsidence Associ
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PIA02435
Sol (our sun)
ASTER
| Title |
Uplift and Subsidence Associated with the Great Aceh-Andaman Earthquake of 2004 |
| Original Caption Released with Image |
The magnitude 9.2 Indian Ocean earthquake of December 26, 2004, produced broad regions of uplift and subsidence. In order to define the lateral extent and the downdip limit of rupture, scientists from Caltech, Pasadena, Calif., NASA's Jet Propulsion Laboratory, Pasadena, Calif., Scripps Institution of Oceanography, La Jolla, Calif., the U.S. Geological Survey, Pasadena, Calif., and the Research Center for Geotechnology, Indonesian Institute of Sciences, Bandung, Indonesia, first needed to define the pivot line separating those regions. Interpretation of satellite imagery and a tidal model were one of the key tools used to do this. These pre-Sumatra earthquake (a) and post-Sumatra earthquake (b) images of North Sentinel Island in the Indian Ocean, acquired from the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) instrument on NASA's Terra spacecraft, show emergence of the coral reef surrounding the island following the earthquake. The tide was 30 plus or minus 14 centimeters lower in the pre-earthquake image (acquired November 21, 2000) than in the post-earthquake image (acquired February 20, 2005), requiring a minimum of 30 centimeters of uplift at this locality. Observations from an Indian Coast Guard helicopter on the northwest coast of the island suggest that the actual uplift is on the order of 1 to 2 meters at this site. In figures (c) and (d), pre-earthquake and post-earthquake ASTER images of a small island off the northwest coast of Rutland Island, 38 kilometers east of North Sentinel Island, show submergence of the coral reef surrounding the island. The tide was higher in the pre-earthquake image (acquired January 1, 2004) than in the post-earthquake image (acquired February 4, 2005), requiring subsidence at this locality. The pivot line must run between North Sentinel and Rutland islands. Note that the scale for the North Sentinel Island images differs from that for the Rutland Island images. The tidal model used for this study was based on data from JPL's Topex/Poseidon satellite. The model was used to determine the relative sea surface height at each location at the time each image was acquired, a critical component used to quantify the deformation. The scientists' method of using satellite imagery to recognize changes in elevation relative to sea surface height and of using a tidal model to place quantitative bounds on coseismic uplift or subsidence is a novel approach that can be adapted to other forms of remote sensing and can be applied to other subduction zones in tropical regions. ASTER is one of five Earth-observing instruments launched December 18, 1999, on NASA's Terra satellite. The instrument was built by Japan's Ministry of Economy, Trade and Industry. A joint U.S./Japan science team is responsible for validation and calibration of the instrument and the data products. The broad spectral coverage and high spectral resolution of ASTER provides scientists in numerous disciplines with, critical information for surface mapping, and monitoring of dynamic conditions and temporal change. Example applications are: monitoring glacial advances and retreats, monitoring potentially active volcanoes, identifying crop stress, determining cloud morphology and physical properties, wetlands evaluation, thermal pollution monitoring, coral reef degradation, surface temperature mapping of soils and geology, and measuring surface heat balance. The U.S. science team is located at NASA's Jet Propulsion Laboratory, Pasadena, Calif. The Terra mission is part of NASA's Science Mission Directorate. |
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International Space Station Imagery |
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| General Description |
International Space Station Imagery |
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