The Eruption of Mount St. HelensThe Eruption of Mount St. HelensBefore After

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. . Mount St. Helens was a beautiful place to hike, Mount St. Helens was a beautiful place to hike, camp, and enjoy. It was considered one of the most camp, and enjoy. It was considered one of the most

symmetrical mountains in the Cascade range.symmetrical mountains in the Cascade range.Insert pictures here.

The first indication that the volcano was awakening was a The first indication that the volcano was awakening was a series of earthquakesseries of earthquakes. . The first quake was on March 20, The first quake was on March 20,

1980. Then many other quakes followed. It was hard to tell 1980. Then many other quakes followed. It was hard to tell when one was finished and another began.when one was finished and another began.

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SmallSmall explosions began on March 27 which explosions began on March 27 which blew out ash and steam. The snowy blew out ash and steam. The snowy

mountain top looked dirty.mountain top looked dirty.Insert pictures here.

On the north side of the mountain, a On the north side of the mountain, a bulge began to grow. It was bulging five bulge began to grow. It was bulging five

to six feet higher each day.to six feet higher each day. Insert pictures here.

On May 18, 1980, the mountain’s bulge On May 18, 1980, the mountain’s bulge suddenly blew.suddenly blew.

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The blast was caused by an The blast was caused by an earthquake which opened a crack in earthquake which opened a crack in

the bulge, letting in air to the the bulge, letting in air to the superheated water inside the superheated water inside the

mountain. The water exploded into mountain. The water exploded into steam instantly, blasting off 1200 steam instantly, blasting off 1200

feet of the top and north side of the feet of the top and north side of the mountain. The force of the blast mountain. The force of the blast

blew down and scorched 150 blew down and scorched 150 square miles of forest.square miles of forest.

Notice the two men in the circle to get an idea of how huge the trees were.

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Next, the loosened rock and mud of the Next, the loosened rock and mud of the mountain slid down into Spirit Lake and the mountain slid down into Spirit Lake and the

Toutle River valley.Toutle River valley.

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The volcano then spewed ash, pumice, and gas into The volcano then spewed ash, pumice, and gas into the sky. It traveled eastward on the wind and made the sky. It traveled eastward on the wind and made one town eighty miles away so dark that the street one town eighty miles away so dark that the street

lights turned on during the daylights turned on during the day..Insert pictures here.

By the end of May 18, countless lives of animals and By the end of May 18, countless lives of animals and plants had lost their lives, including 57 people. The plants had lost their lives, including 57 people. The

volcano presently continues to have much less volcano presently continues to have much less

dramatic eruptions.dramatic eruptions.

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ReferencesReferencesPictures for the presentation can be found at these websites.Pictures for the presentation can be found at these websites. LiontracksLiontracks

www.bibleistrue.com/qna/pqna9.htmwww.bibleistrue.com/qna/pqna9.htmBefore and after photographBefore and after photograph

Mount St. Helens August 18, 2003 from Hopkins Hill ViewpointMount St. Helens August 18, 2003 from Hopkins Hill Viewpointwww.billau.bouwman.com/2003/St-Helens.htmlwww.billau.bouwman.com/2003/St-Helens.htmlBefore photographs: a year before and one day beforeBefore photographs: a year before and one day before

Mount St. Helens Precursory Activity Mount St. Helens Precursory Activity http://vulcan.wr.usgs.gov/Volcanoes/MSH/May18/MSHThisWeek/32228/32228.htmhttp://vulcan.wr.usgs.gov/Volcanoes/MSH/May18/MSHThisWeek/32228/32228.htmSeismic chartSeismic chart

Mount St. Helens Precursory ActivityMount St. Helens Precursory Activityhttp://vulcan.wr.usgs.gov/Volcanoes/MSH/May18/MSHThisWeek/5359/5359.htmhttp://vulcan.wr.usgs.gov/Volcanoes/MSH/May18/MSHThisWeek/5359/5359.htmBulging mountain photographBulging mountain photograph

Predicting Volcanic Eruptions by Helen StewartPredicting Volcanic Eruptions by Helen Stewartwww.abdn.ac.uk/~geo027/gg3520/hsMt_St_Helens.jpgwww.abdn.ac.uk/~geo027/gg3520/hsMt_St_Helens.jpgExploding volcanoExploding volcano

USGS AftermathUSGS Aftermathhttp://pubs.usgs.gov/publications/msh/impact.htmlhttp://pubs.usgs.gov/publications/msh/impact.htmlDowned treesDowned trees

USGS Photo by T. J. CasadevaltUSGS Photo by T. J. Casadevaltwww.brookes.ac..uk/geology/8361/2002/berangere/mthelen.3.htmwww.brookes.ac..uk/geology/8361/2002/berangere/mthelen.3.htmMudslide viewMudslide view

Sudden Destruction in MaySudden Destruction in Maywww.kidscosmos.org/kid-stuff/kids-volcanoes-st-helens.htmlwww.kidscosmos.org/kid-stuff/kids-volcanoes-st-helens.htmlEruption after blastEruption after blast

Dokumentation uber den Ausbruch des Mount St. HelensDokumentation uber den Ausbruch des Mount St. Helenswww.eja-online.info/Videoarchiv/Mount_St_Helens.htmlwww.eja-online.info/Videoarchiv/Mount_St_Helens.htmlPeacefully steaming after 1980Peacefully steaming after 1980