1. Forum
  2. FidoNet
  3. EARTH

  • ES Picture of the Day 11 2021

    From Dan Richter@1:317/3 to All on Wed Aug 11 11:00:32 2021
    EPOD - a service of USRA

    The Earth Science Picture of the Day (EPOD) highlights the diverse processes and phenomena which shape our planet and our lives. EPOD will collect and archive photos, imagery, graphics, and artwork with short explanatory
    captions and links exemplifying features within the Earth system. The
    community is invited to contribute digital imagery, short captions and
    relevant links.


    Atacama Desert Nightscape

    August 11, 2021

    Pacana

    Photographer: Alexis Trigo

    Summary Author: Alexis Trigo & Cadan Cummings

    This great rock formation is called Monje de La Pacana and it is
    located in the middle of the Atacama Desert and the Andes
    Mountain range. Sculpted over innumerable years, this rock structure is
    a great example of how wind erosion shapes the desert landscape.
    Due to the hyper-arid climate of the Atacama Desert, some
    landscapes and rock features can be as old as 10-15 million years
    old. Another result of the extremely dry climate and high elevation
    (14,350 ft or 4375 m) is exceptionally dark skies. This region is
    one of the darkest places in the world, meaning even the brightness of
    the stars appears to cast slight shadows on the ground. The night sky
    brightness is class 1 on the Bortle scale, which allows unaided
    observation of celestial objects in magnitude of 7.6 to 8 along with
    airglow visible on the horizon. On the right side you can see the
    Large and Small Magellanic clouds. Photo taken November 16,
    2020.
    * Atacama Desert, Chile Coordinates: -23.0607, -67.4788

    Related EPODs

    Atacama Desert Nightscape Archive - Star Trails Above Pemaquid
    Point Lighthouse, Bristol, Maine Archive - Full Moon Over Mount
    Rainier The Power of One Moon Occultation of Mars The Yin
    and Yang of the Lunar Cycle
    More...

    Night Sky Links

    * Space Weather Live
    * Space Weather Live Forum
    * About the Moon
    * American Meteor Society
    * Arbeitskreises Meteore e.V.
    * Global City Lights
    * Heavens Above Home Page
    * The International Meteor Organization
    * Lunar and Planetary Institute
    * MoonConnection
    * NASA Eclipse Web Page
    * Understanding The Moon Phases

    -
    Earth Science Picture of the Day is a service of the Universities
    Space Research Association.

    https://epod.usra.edu

    --- up 13 weeks, 5 days, 12 hours, 15 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (1:317/3)
  • From Dan Richter@1:317/3 to All on Sat Dec 11 11:00:26 2021
    EPOD - a service of USRA

    The Earth Science Picture of the Day (EPOD) highlights the diverse processes and phenomena which shape our planet and our lives. EPOD will collect and archive photos, imagery, graphics, and artwork with short explanatory
    captions and links exemplifying features within the Earth system. The
    community is invited to contribute digital imagery, short captions and
    relevant links.


    Archive - Ubehebe Crater

    December 11, 2021

    6a0105371bb32c970b01bb09128d39970d
    6a0105371bb32c970b01bb09128d39970d
    6a0105371bb32c970b01bb09128d39970d

    Every weekend we present a notable item from our archives.

    This EPOD was originally published July 4, 2016.

    Photographer: Dave Lynch
    Summary Author: Dave Lynch July 2016 Viewer's Choice

    Ubehebe Crater, shown at top, lies at the north end of the
    Cottonwood Mountains in Death Valley National Park, California.
    Only about a half mile across (0.8 km) and a few hundred feet deep,
    it's nonetheless one of the most beautiful and accessible volcanoes in
    the world. It was formed by a phreatomagmatic eruption, in which
    upward moving magma encountered subsurface water. The water flashed
    into steam and the resulting explosion fractured existing overlying
    rock and expelled massive amounts of sediment and bits of lava
    called lapilli. While there are countless volcanic lapilli in the
    area, no surface magma flow occurred. Another smaller volcanic crater,
    Little Ubehebe (at middle), is found nearby. Satellite imagery (bottom)
    show a dark blanket of ejecta covering the area. The Ubehebe
    volcanics are relatively young, 800 – 7000 years old, though the exact
    age remains uncertain. Photos taken on February 8, 2016.
    * Ubehebe Crater, California Coordinates: 37.010148 -117.450657

    Related EPODs

    Archive - Ubehebe Crater Cumbre Vieja Eruption Column
    Archive - Amboseli National Park, Kenya Quebrada de las Conchas
    Nature Reserve Geology of Badlands National Park Vortex Clouds
    Around Mount Etna
    More...

    Geology Links

    * Earthquakes
    * Geologic Time
    * Geomagnetism
    * General Dictionary of Geology
    * Mineral and Locality Database
    * Mohs Scale of Mineral Hardness
    * This Dynamic Earth
    * USGS
    * USGS Ask a Geologist
    * USGS/NPS Geologic Glossary
    * USGS Volcano Hazards Program

    -
    Earth Science Picture of the Day is a service of the Universities
    Space Research Association.

    https://epod.usra.edu

    --- up 6 days, 20 hours, 43 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (1:317/3)