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    "title": "Landsat Tracks Mount St. Helens Recovery",
    "description": "In 1980, Mount St. Helens roared back into major activity with a massive eruption that leveled surrounding forest, blasted away over a thousand feet of the mountain's summit, and claimed 57 human lives.This short video shows the catastrophic eruption - and the amazing recovery of the surrounding ecosystem - through the eyes of the Landsat satellites, which have been imaging our planet for almost forty years. By observing red, near-infrared, and green wavelengths of light reflected off the surface, it is possible to distinguish healthy vegetation (in green) from bare ground (in magenta).Music: Running by Dirk Ehlert [BMI], Guillermo De La Barreda [BMI]Watch this video on the NASA Goddard YouTube channel. || 12612-Mt-St-Helens-timelapse-print.jpg (1920x1080) [2.3 MB] || 12612-Mt-St-Helens-timelapse-print_searchweb.png (320x180) [129.3 KB] || 12612-Mt-St-Helens-timelapse-print_thm.png (80x40) [7.7 KB] || 12612-Mt-St-Helens-timelapse_prores.mov (1280x720) [1.3 GB] || 12612-Mt-St-Helens-timelapse_large.mp4 (1920x1080) [95.7 MB] || 12612-Mt-St-Helens-timelapse_youtube_hq.mov (1920x1080) [407.5 MB] || 12612-Mt-St-Helens-timelapse_appletv.m4v (1280x720) [44.8 MB] || 12612-Mt-St-Helens-timelapse_.webm (960x540) [38.8 MB] || GSFC_20170518_MtStHelens_m12612_Timelapse.en_US.vtt [42 bytes] || 12612-Mt-St-Helens-timelapse_ipod_sm.mp4 (320x240) [15.5 MB] || ",
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        "alt_text": "In 1980, Mount St. Helens roared back into major activity with a massive eruption that leveled surrounding forest, blasted away over a thousand feet of the mountain's summit, and claimed 57 human lives.This short video shows the catastrophic eruption - and the amazing recovery of the surrounding ecosystem - through the eyes of the Landsat satellites, which have been imaging our planet for almost forty years. By observing red, near-infrared, and green wavelengths of light reflected off the surface, it is possible to distinguish healthy vegetation (in green) from bare ground (in magenta).Music: Running by Dirk Ehlert [BMI], Guillermo De La Barreda [BMI]Watch this video on the NASA Goddard YouTube channel.",
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        "alt_text": "In 1980, Mount St. Helens roared back into major activity with a massive eruption that leveled surrounding forest, blasted away over a thousand feet of the mountain's summit, and claimed 57 human lives.This short video shows the catastrophic eruption - and the amazing recovery of the surrounding ecosystem - through the eyes of the Landsat satellites, which have been imaging our planet for almost forty years. By observing red, near-infrared, and green wavelengths of light reflected off the surface, it is possible to distinguish healthy vegetation (in green) from bare ground (in magenta).Music: Running by Dirk Ehlert [BMI], Guillermo De La Barreda [BMI]Watch this video on the NASA Goddard YouTube channel.",
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            "description": "In 1980, Mount St. Helens roared back into major activity with a massive eruption that leveled surrounding forest, blasted away over a thousand feet of the mountain's summit, and claimed 57 human lives.<p><p>This short video shows the catastrophic eruption - and the amazing recovery of the surrounding ecosystem - through the eyes of the Landsat satellites, which have been imaging our planet for almost forty years. <p><p>By observing red, near-infrared, and green wavelengths of light reflected off the surface, it is possible to distinguish healthy vegetation (in green) from bare ground (in magenta).<p><p>Music: Running by Dirk Ehlert [BMI], Guillermo De La Barreda [BMI]<p><b>Watch this video on the <a href=\"https://youtu.be/63-v6-O4Vmw\" target=\"_blank\" >NASA Goddard YouTube channel</a>.</b><p>",
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                        "alt_text": "In 1980, Mount St. Helens roared back into major activity with a massive eruption that leveled surrounding forest, blasted away over a thousand feet of the mountain's summit, and claimed 57 human lives.This short video shows the catastrophic eruption - and the amazing recovery of the surrounding ecosystem - through the eyes of the Landsat satellites, which have been imaging our planet for almost forty years. By observing red, near-infrared, and green wavelengths of light reflected off the surface, it is possible to distinguish healthy vegetation (in green) from bare ground (in magenta).Music: Running by Dirk Ehlert [BMI], Guillermo De La Barreda [BMI]Watch this video on the NASA Goddard YouTube channel.",
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                        "alt_text": "In 1980, Mount St. Helens roared back into major activity with a massive eruption that leveled surrounding forest, blasted away over a thousand feet of the mountain's summit, and claimed 57 human lives.This short video shows the catastrophic eruption - and the amazing recovery of the surrounding ecosystem - through the eyes of the Landsat satellites, which have been imaging our planet for almost forty years. By observing red, near-infrared, and green wavelengths of light reflected off the surface, it is possible to distinguish healthy vegetation (in green) from bare ground (in magenta).Music: Running by Dirk Ehlert [BMI], Guillermo De La Barreda [BMI]Watch this video on the NASA Goddard YouTube channel.",
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                        "alt_text": "In 1980, Mount St. Helens roared back into major activity with a massive eruption that leveled surrounding forest, blasted away over a thousand feet of the mountain's summit, and claimed 57 human lives.This short video shows the catastrophic eruption - and the amazing recovery of the surrounding ecosystem - through the eyes of the Landsat satellites, which have been imaging our planet for almost forty years. By observing red, near-infrared, and green wavelengths of light reflected off the surface, it is possible to distinguish healthy vegetation (in green) from bare ground (in magenta).Music: Running by Dirk Ehlert [BMI], Guillermo De La Barreda [BMI]Watch this video on the NASA Goddard YouTube channel.",
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                        "alt_text": "In 1980, Mount St. Helens roared back into major activity with a massive eruption that leveled surrounding forest, blasted away over a thousand feet of the mountain's summit, and claimed 57 human lives.This short video shows the catastrophic eruption - and the amazing recovery of the surrounding ecosystem - through the eyes of the Landsat satellites, which have been imaging our planet for almost forty years. By observing red, near-infrared, and green wavelengths of light reflected off the surface, it is possible to distinguish healthy vegetation (in green) from bare ground (in magenta).Music: Running by Dirk Ehlert [BMI], Guillermo De La Barreda [BMI]Watch this video on the NASA Goddard YouTube channel.",
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                        "alt_text": "In 1980, Mount St. Helens roared back into major activity with a massive eruption that leveled surrounding forest, blasted away over a thousand feet of the mountain's summit, and claimed 57 human lives.This short video shows the catastrophic eruption - and the amazing recovery of the surrounding ecosystem - through the eyes of the Landsat satellites, which have been imaging our planet for almost forty years. By observing red, near-infrared, and green wavelengths of light reflected off the surface, it is possible to distinguish healthy vegetation (in green) from bare ground (in magenta).Music: Running by Dirk Ehlert [BMI], Guillermo De La Barreda [BMI]Watch this video on the NASA Goddard YouTube channel.",
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            "description": "The May 18, 1980, eruption of Mount St. Helens came after two months of small earthquakes. During the eruption, an avalanche of debris and mud spread for miles from the former summit, and a blast of steam and hot ash covered an area of about 600 square kilometers (230 square miles).<br><br>In the decades since, scientists have studied the recovery of the ecosystem around the mountain using the Landsat series of satellites. By observing different wavelengths of light reflected of the surface, Landsat data can identify different types of landcover. This visualization uses red, near-infrared, and green to distinguish healthy vegetation (green) from bare ground (magenta).<br><br>NASA and the U.S. Department of the Interior through the U.S. Geological Survey (USGS) jointly manage <a href=\"https://landsat.gsfc.nasa.gov/\">Landsat</a>, and the USGS preserves a 40-plus-year <a href=\"https://landsat.usgs.gov/\">archive of Landsat images</a> that is freely available over the Internet. Since the launch of Landsat 1 in 1972, Landsat satellites have become an integral part of many operational land management activities. Landsat satellites provide decision makers with key information about the world’s food, forests, water and how these and other land resources are being used.<br><br>The USGS has detailed information on <a href=\"https://volcanoes.usgs.gov/volcanoes/st_helens/st_helens_geo_hist_101.html\">the geology of Mount St. Helens</a>.",
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            "title": "For More Information",
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            "description": "See [https://www.nasa.gov/mission_pages/landsat/news/40th-top10-st-helens.html](https://www.nasa.gov/mission_pages/landsat/news/40th-top10-st-helens.html)",
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    "credits": [
        {
            "role": "Producer",
            "people": [
                {
                    "name": "Matthew R. Radcliff",
                    "employer": "USRA"
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            ]
        }
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    "missions": [
        "Landsat"
    ],
    "series": [
        "Geophysical Changes Over Time",
        "Landsat"
    ],
    "tapes": [],
    "papers": [],
    "datasets": [],
    "nasa_science_categories": [
        "Earth"
    ],
    "keywords": [
        "Biology",
        "Biosphere",
        "Earth Science",
        "Forests",
        "HDTV",
        "Terrestrial Ecosystems",
        "Volcano"
    ],
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        {
            "id": 10550,
            "url": "https://svs.gsfc.nasa.gov/10550/",
            "page_type": "Produced Video",
            "title": "Forest Recovering From Mount St. Helens Eruption",
            "description": "The 1980 Mount Saint Helens eruption was one of the most significant natural disasters in the US in the past half-century. The eruption laid waste to 230 square miles. Landsat captured the extent of the destruction, with grey tones revealing widespread lava flows and ash deposits. Subsequent Landsat images over the years show the spread of vegetation recovery across the site. || ",
            "release_date": "2010-05-18T00:00:00-04:00",
            "update_date": "2023-05-03T13:54:14.204010-04:00",
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                "alt_text": "Thirty years ago, Mount St. Helens roared back into major activity with a massive eruption that leveled surrounding forest, blasted away over a thousand feet of the mountain's summit, and claimed 57 human lives.This short video shows the catastrophic eruption - and the amazing recovery of the surrounding ecosystem - through the eyes of the Landsat satellites, which have been imaging our planet for almost forty years.  For complete transcript, click here.",
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}