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Satellite Image Information for the Mount Oyama Eruptions
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Remotely Sensed Data for Mount Oyama
All instruments viewing the surface capture data in multiple bands, similar to those for Landsat TM bands (http://www.geoinsight.com/Knowledgebase/RemoteSensing/Landsat.cfm).
It is easy to produce various three-band color composite images with different band and color combinations (
http://observe.arc.nasa.gov/nasa/exhibits/eyes_sky/CharlestonPics.html).
Image interpretation of three-band color composite images
for all instruments is similar to that for Landsat TM data.
Terra ASTER
The four Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) images show the sequence of volcanic activity from before the first eruption to after the second major eruption. These images show the forested slopes of the volcano (red), the summit caldera, and cultural features (roads, airport runway, and larger buildings). A black fallen-ash deposit is located in the upper right of the July image; the image data has been combined with shuttle radar elevation data for a perspective view. The eruptive plume for 29 August (10:42 AM JST) is also seen in the MISR image. More extensive ash deposits and steam venting from the caldera are seen in the September image. The summit is at 2,686-ft (818-m) elevation.
The image for 29 August is the full granule;
other images are developed from data subsets centered on the island.
The images were provided by the NASA/GSFC/MITI/ERSDAC/JAROS and United States/Japan ASTER Science Team
to the Earth Observatory Newsroom.
They are also available from the ASTER Ground Data System (GDS) Image Gallery.
Digital data for some images currently are not available from the EOS Data Gateway (EDG) or GDS.
OrbView-2 SeaWiFS
The Sea-Viewing Wide-Field-of-View Sensor (SeaWiFS) image of the steam and smoke cloud from Mount Oyama on Miyakejima Island was acquired on 28 August 2000, one day before the major eruption on 29 August.
The image was provided by the SeaWiFS Project, NASA/Goddard Space Flight Center, and ORBIMAGE
to the Earth Observatory Newsroom.
Granule ID: s2000241024910
The Multi-angle Imaging SpectroRadiometer (MISR) stereo "anaglyph" (3-D) image for 29 August 2000 shows the ocean (shades of blue), forested slopes of the Japanese mainland and islands (green), and cloud (white) and eruption plume (grey) features. The Tokyo waterfront is evident under the haze at the top-left of the bay. This image appears three-dimensional when viewed through red/blue glasses with the red filter over the left eye.
The image was provided by the MISR Science Team to the Earth Observatory Newsroom.
Langley Research Center (LaRC) Local Granule ID: MISR_AM1_GRP_ELLIPSOID_GM_P106_O003709_AN_03
The Moderate Resolution Imaging Spectroradiometer (MODIS) image subset for 29 August 2000 shows the ocean (shades of blue), forested slopes of the Japanese mainland and islands (dark green), and cloud (white) and eruption plume (grey) features.
Note that haze from the smoke cloud doubles back over the Japanese mainland. The extensive plumes seen in the MODIS and CERES images may include material erupted on 28 August.
The wide-area image is the full granule, projected into a latitude-longitude grid.
The image was provided by the MODIS Science Team to the Earth Observatory Newsroom.
L1B Granule ID: MOD021KM.A2000242.0140.002.2000264223516
The Enhanced Thematic Mapper Plus (ETM+) image subset for 21 September 2000 shows the ocean (black), forested slopes of the Japanese mainland and Izu Islands (green), and cloud (white) and eruption plume (white and blue-grey) features.
This browse image (Path 107, Row 36) is available from the EDG. Granule ID: SC:L70RWRS.002:2001565280
The Total Ozone Mapping Spectrometer (TOMS) image subset for August 19 2000. The aerosol index (AI) and sulfur dioxide index (SOI) images show the contoured concentrations superimposed upon a background map.
The image was provided by the TOMS Science Team.
The Clouds and the Earth's Radiant Energy System (CERES) longwave (LW) image subset for 29 August 2000 shows the energy being lost to space. The same amount of thermal emission does not distinguish land from ocean features. The colder tops of the tropical thunderstorm (yellow to green to blue) are distinguished from the surface seen through clear air (purple), and the hot (high thermal emission) eruption plume (white) features. Note that haze (white and pink) from the eruption plume doubles back over the Japanese mainland and across the China Sea as far as Korea. It also extends over the Pacific Ocean to the east and south.
The image was subset by latitude and longitude from the full-earth granule.
This image was provided by the CERES Science Team. LaRC Local Granule ID: CER_ES8_Terra-FM2_Edition1_019015.20000829
Obtain additional information about Earth-observing instrument Coincident Data for Mount Oyama.