Inondations Thessalonique (Grèce)Tremblements de terre IntroductionTremblement de terre d'IzmitOuragans Ondes de tempêteL'ouragan KatrinaVolcans IntroductionCeinture volcanique andineEtnaNyiragongo et Nyamuragira
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Exercice 2 : Détection des points chauds et des panaches - suite
| | | | | MODIS Bands 31 and 32 are used to detect a volcanic plume and distinguish it from clouds. The bands range from 10.780 - 11.280 μm (31) and 11.770 - 12.270 μm (32), and correspond to the thermal IR.
Credits: USGS | |  |  | |
| | | | | Band subtraction (Band 31 minus band 32) for ash detection of the MODIS image of 24 July 2001. The difference between the brightness temperatures usually results in negative values for volcanic plumes containing ash (dark), and positive values for atmospheric clouds (light).
Credits: USGS | | | | |
| | | | | Band subtraction (Band 31 - band 32) for ash detection of the MODIS image of 23 July 2001. The difference between the brightness temperatures usually shows negative values for volcanic plumes containing ash (dark) and positive values for atmospheric clouds (light).
Credits: USGS | | | | |
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| | Etna IntroductionSurveillance des points chauds et des panaches volcaniques Feuille de travailExercice 1 : Explorer le volcanExercice 2 : Détection des points chauds et des panachesExercice 3 : Surveillance d'un panache - animationEduspace - Télécharger Etna_MODIS.zipEduspace - Logiciels LEOWorks 3LEOWorks 3 TutorialLiens utiles Surveillance des points chauds avec MODISCentre Conseil en Cendre Volcanique
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