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Among the key pieces of information that a computer model must have to predict the spread of ash is when the eruption happened, how much ash was ejected, and how high the plume got. 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"For More Information", "caption": "", "description": "See [http://earthobservatory.nasa.gov/NaturalHazards/view.php?id=43968](http://earthobservatory.nasa.gov/NaturalHazards/view.php?id=43968)", "items": [], "extra_data": {} } ], "studio": "hw", "funding_sources": [ "ESE" ], "credits": [ { "role": "Graphic designer", "people": [ { "name": "Marit Jentoft-Nilsen", "employer": "Global Science and Technology, Inc." } ] } ], "missions": [ "Terra" ], "series": [], "tapes": [], "papers": [], "datasets": [ { "name": "", "common_name": "", "platform": "Terra", "sensor": "MISR", "type": "Other", "organizations": [], "description": "", "credit": "", "url": "", "date_range": null }, { "name": "", "common_name": "", "platform": "Terra", "sensor": "MODIS", "type": "Other", "organizations": [], "description": "", "credit": "", "url": "", "date_range": null } ], "nasa_science_categories": [ "Earth" ], "keywords": [ "Earth Science", "Human Dimensions", "Hyperwall", "Iceland", "Location", "Natural 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