BACK Mount St. Helens Set I
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Image Captions List: Captions may also be viewed with the images in the PowerPoint set. |
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SLIDE NAME
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DESCRIPTION
AND PHOTO CREDIT
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St.H1-Slide01.jpg
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Satellite image of Mt. St. Helens. Tan area north of the crater is the area devastated by the explosion of May 18, 1980. (J. Dohrenwend) | |
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St.H1-Slide02.jpg
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Mt. St. Helens before the May 18 eruption. (D.J. Easterbrook) | |
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St.H1-Slide03.jpg
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Mt. St. Helens eruption of steam and ash prior to the explosion of May 18, 1980. (D.J. Easterbrook) | |
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St.H1-Slide04.jpg
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Mt. St. Helens eruption of steam and ash prior to the explosion of May 18, 1980. (D.J. Easterbrook) | |
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St.H1-Slide05.jpg
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Mt. St. Helens ash-covered summit and crater prior to the explosion of May 18, 1980. (D.J. Easterbrook) | |
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St.H1-Slide06.jpg
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Mt. St. Helens half an hour prior to the explosion of May 18, 1980. (D.J. Easterbrook) | |
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St.H1-Slide07.jpg
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Collapsing summit crater of Mt. St. Helens prior to the explosion of May 18, 1980. The area in the lower right corner had bulged outward more than 100 m. ((D.J. Easterbrook) | |
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St.H1-Slide08.jpg
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Satellite image of Mt. St. Helens. Light color is the area devastated by the explosion of May 18, 1980. Yellow is the area in which forests were killed but not removed by the May 18, 1980 explosion. Red area consists of living trees. (NASA) | |
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St.H1-Slide09.jpg
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Mt. St. Helens eruption of May 18, 1980. The black area on the right is ash downwind from the crater. (D.J. Easterbrook) | |
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St.H1-Slide10.jpg
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Mt. St. Helens eruption of May 18, 1980. The black area on the right is ash downwind from the crater. (D.J. Easterbrook) | |
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St.H1-Slide11.jpg
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Mt. St. Helens eruption of May 18, 1980. (D.J. Easterbrook) | |
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St.H1-Slide12.jpg
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Mt. St. Helens eruption of May 18, 1980. (A. Post) |  TOP |
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St.H1-Slide13.jpg
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Mt. St. Helens eruption of May 18, 1980. (A. Post) | |
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St.H1-Slide14.jpg
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Mt. St. Helens crater after the May 18, 1980 explosion. (A. Post) | |
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St.H1-Slide15.jpg
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Pyroclastic flows issuing from the post-May 18, 1980 crater. (USGS) | |
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St.H1-Slide16.jpg
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Ash fallout pattern from the May 18, 1980 explosion of Mt. St. Helens. (D. Easterbrook/D. Pevear) | |
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St.H1-Slide17.jpg
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Cleaning up ash from the May 18, 1980 explosion of Mt. St. Helens. (D. Easterbrook/D. Peavear) | |
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St.H1-Slide18.jpg
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Electron microscopy image of ash from Mt. St. Helens eruption. (D. Pevear) | |
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St.H1-Slide19.jpg
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Blast zone across the Toutle River valley from Mt. St. Helens. (D.J. Easterbrook) | |
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St.H1-Slide20.jpg
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Blast zone across the Toutle River valley from Mt. St. Helens. (D.J. Easterbrook) | |
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St.H1-Slide21.jpg
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Remains of trees shredded by the May 18, 1980 explosion of Mt. St. Helens. (D.J. Easterbrook) | |
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St.H1-Slide22.jpg
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Remains of trees shredded by the May 18, 1980 explosion of Mt. St. Helens. (D.J. Easterbrook) | |
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St.H1-Slide23.jpg
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Remains of trees shredded by the May 18, 1980 explosion of Mt. St. Helens. (D.J. Easterbrook) | |
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St.H1-Slide24.jpg
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Trees blown down by the May 18, 1980 explosion of Mt. St. Helens. (D.J. Easterbrook) | TOP |
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St.H1-Slide25.jpg
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Trees blown down by the May 18, 1980 explosion of Mt. St. Helens. (D.J. Easterbrook) | |
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St.H1-Slide26.jpg
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Trees blown down by the May 18, 1980 explosion of Mt. St. Helens. (D.J. Easterbrook) | |
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St.H1-Slide27.jpg
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Trees blown down by the May 18, 1980 explosion of Mt. St. Helens. (D.J. Easterbrook) | |
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St.H1-Slide28.jpg
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Trees blown down by the May 18, 1980 explosion of Mt. St. Helens. (D.J. Easterbrook) | |
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St.H1-Slide29.jpg
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Mudflow levee and valley fill in the Toutle River valley. Trees blown down by the May 18, 1980 explosion of Mt. St. Helens. (D.J. Easterbrook) | |
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St.H1-Slide30.jpg
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Mt. St. Helens crater after the May 18, 1980 explosion. (D.J. Easterbrook) | |
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St.H1-Slide31.jpg
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Mt. St. Helens crater after the May 18, 1980 explosion. Beginning of the building of post-eruption dome. (D.J. Easterbrook) | |
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St.H1-Slide32.jpg
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Post-eruption dome in Mt. St. Helens crater after the May 18, 1980 explosion. (USGS) | |
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St.H1-Slide33.jpg
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Pyroclastic flows from Mt. St. Helens 1980 eruption in the upper Toutle River valley. (D.J. Easterbrook) | |
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St.H1-Slide34.jpg
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Pyroclastic flows from Mt. St. Helens 1980 eruption in the upper Toutle River valley. (D.J. Easterbrook) | |
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St.H1-Slide35.jpg
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Pyroclastic flows from Mt. St. Helens 1980 eruption in the upper Toutle River valley. (D.J. Easterbrook) | |
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St.H1-Slide36.jpg
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Pyroclastic flows from Mt. St. Helens 1980 eruption in the upper Toutle River valley. (D.J. Easterbrook) | TOP |
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St.H1-Slide37.jpg
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Pumice making up a pyroclastic flow from Mt. St. Helens 1980 eruption in the upper Toutle River valley. (D.J. Easterbrook) | |
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St.H1-Slide38.jpg
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Lahars from Mt. St. Helens in the Toutle River valley. (D.J. Easterbrook) | |
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St.H1-Slide39.jpg
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Irregular surface of lahars from Mt. St. Helens in the upper Toutle River valley. (D.J. Easterbrook) | |
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St.H1-Slide40.jpg
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Depressions in Toutle Valley lahar from Mt. St. Helens. (D.J. Easterbrook) | |
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St.H1-Slide41.jpg
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Lahars from Mt. St. Helens 1980 eruption filling the upper Toutle River valley. (D.J. Easterbrook) | |
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St.H1-Slide42.jpg
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Lahars from Mt. St. Helens 1980 eruption filling the upper Toutle River valley. (D.J. Easterbrook) | |
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St.H1-Slide43.jpg
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Trees in lahars from Mt. St. Helens 1980 eruption filling the upper Toutle River valley. (D.J. Easterbrook) | |
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St.H1-Slide44.jpg
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Irregular surface of a lahar from Mt. St. Helens 1980 eruption filling the upper Toutle River valley. The lighter-toned material between mounds consists of later, more fluid mudflows. (D.J. Easterbrook) | |
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St.H1-Slide45.jpg
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Lahars from Mt. St. Helens 1980 eruption filling the upper Toutle River valley. (D.J. Easterbrook) | |
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St.H1-Slide46.jpg
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Remains of a truck wrapped around a tree by mudflows from the Mt. St. Helens 1980 eruption, lower Toutle River valley. (D.J. Easterbrook) | |
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St.H1-Slide47.jpg
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Bridge taken out by mudflows from Mt. St. Helens 1980 eruption, Toutle River valley. (D.J. Easterbrook) | |
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St.H1-Slide48.jpg
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Remains of a bridge taken out by mudflows from Mt. St. Helens 1980 eruption, Toutle River valley. (D.J. Easterbrook) | |
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St.H1-Slide49.jpg
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Portion of a house ripped off by mudflows from Mt. St. Helens 1980 eruption, Toutle River valley. (D.Easterbrook/D. Pevear) | |
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St.H1-Slide50.jpg
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Mud lines on trees from mudflows of the Mt. St. Helens 1980 eruption, Toutle River valley. (D.J. Easterbrook) | TOP |