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This section provides an update on the recent earthquake in Chile and explores topics related to the Earth's atmosphere, the origin of the Moon, and the geology of Mercury, Venus, and the Moon's interior.
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Prelim 2 is in 2 weeks • Next week’s section will be a review • Assignment : send me 2 topics/ questions you want me to review • Email them to me by Sunday at 2 pm • This counts towards today’s section grade
Tectonics in action Over the weekend, there was a magnitude 8.8 earthquake in Chile. There have been over 150 aftershocks magnitude 5.0 or greater, including 8 of magnitude 6.0 or greater.1 The quake originated 35km below the surface of the Earth.2 If you would like to help, check this link: http://www.astro.cornell.edu/~babs/howtohelpchile/howtohelpchile.html 1 http://earthquake.usgs.gov/earthquakes/eqinthenews/2010/us2010tfan/#summary 2 http://earthquake.usgs.gov/earthquakes/eqinthenews/2010/us2010tfan/#details
http://earthquake.usgs.gov/earthquakes/aftershocks/?code=2010tfan&source=us&title=M8.8%20-%20Offshore%20Maule,%20Chilehttp://earthquake.usgs.gov/earthquakes/aftershocks/?code=2010tfan&source=us&title=M8.8%20-%20Offshore%20Maule,%20Chile
Earth’s atmosphere * variable gases From http://www.physicalgeography.net/fundamentals/7a.html
The Greenhouse Effect http://www.fas.org/irp/imint/docs/rst/Sect16/Sect16_2.html
Origin of the Moon • Sisters? • Fission? • Capture? • Giant impact
Mercury: Caloris Basin Image from http://messenger.jhuapl.edu/gallery/sciencePhotos/image.php?page=2&gallery_id=2&image_id=149
Mercury’s day and year • 3 days every 2 years • Animations…. • Rotation and orbit: http://www.messenger-education.org/Interactives/ANIMATIONS/Orbit_Rotation/orbit_rotation_full.htm • The Sun in the sky: http://www.messenger-education.org/Interactives/ANIMATIONS/Day_On_Mercury/day_on_mercury_full.htm
Mercury’s interior Image from http://www.daviddarling.info/encyclopedia/M/Mercury.html
2009: The first global map of Mercury! Image from http://messenger.jhuapl.edu/gallery/sciencePhotos/image.php?page=1&gallery_id=2&image_id=345
Venus Radar Visible UV Images from http://photojournal.jpl.nasa.gov/catalog/PIA10124, http://atmos.nmsu.edu/~nchanove/A105S04/lecture_21.html, and http://nssdc.gsfc.nasa.gov/image/planetary/venus/venusglobe.jpg
The Venusian surface Images from http://www.mentallandscape.com/C_CatalogVenus.htm
The Moon’s interior http://www.astro.psu.edu/users/niel/astro1/slideshows/class41/slides-41.html
http://geophysics.ou.edu/solid_earth/notes/seismology/seismo_interior/seismo_interior.htmlhttp://geophysics.ou.edu/solid_earth/notes/seismology/seismo_interior/seismo_interior.html
Earth’s interior, cont. P wave S wave http://geophysics.ou.edu/solid_earth/notes/seismology/seismo_interior/seismo_interior.html
Surface Processes • Erosion • Tectonics • Volcanism • Impacts Images from http://fireflyforest.net/firefly/2005/11/12/aerial-view-of-the-grand-canyon/, http://www.scientificamerican.com/article.cfm?id=geologists-link-the-great, http://rst.gsfc.nasa.gov/Sect18/Sect18_1.html, and http://users.forthnet.gr/ath/nikolas_c/tectonic_geoology.htm