• ES Picture of the Day 17 2023

    From Dan Richter@1:317/3 to All on Tue Jan 17 11:00:40 2023
    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.


    White Underwing Moth

    January 17, 2023

    DaleH_underwing_image0 (02A)

    Photographer: Dale Hugo
    Summary Author: Dale Hugo

    This attractive and well camouflaged moth was photographed at
    Gooseberry State Park in Minnesota. It was on a lamp post at the
    park’s interpretive center. At first glance I thought it was a mark or
    flaw on the post, but upon closer inspection I realized it was a moth.
    It’s a white underwing moth (Catocala relicta), and apparently,
    they’re common from Arizona through the Mid-West and up into the
    Canadian prairie provinces.

    It seems that these large moths, with a wingspan of 3 inches or so
    (7-8 cm), signal the end of summer as surely as the leaves first change
    color or the geese flock overhead. On warm September nights, you often
    see them flying around streetlights, or bright billboards. During
    daylight they are hard to find because they rest, motionless, on the
    trunks of trees, the sides of buildings or on light standards, such as
    above. Photo taken on September 26, 2022.


    Gooseberry State Park, Minnesota Coordinates: 47.1456, -91.4654


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    Animal Links

    * Animal Diversity Web
    * ARKive
    * BirdLife International
    * Bug Guide
    * Discover Life
    * Integrated Taxonomic Information System
    * Microbial Life Resources
    Earth Science Picture of the Day is a service of the
    -
    Universities Space Research Association.

    https://epod.usra.edu

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  • From Dan Richter@1:317/3 to All on Fri Feb 17 11:00:56 2023
    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.


    Brocken Spectre and Glory Observed from Viterbo Airport, Italy

    February 17, 2023

    Gloria-e-Spettro

    Fogbow-Gloria-Spettro

    Photographer: Marco Meniero

    Summary Author: Marco Meniero

    Suppose we're standing on a hill and the Sun is shining behind us, our
    shadow is projected onto the fog below and is apparently transformed
    into a pyramid-shaped silhouette with its apex at the antisolar
    point, right where the shadow of our head appears. This shadow is
    called the Brocken Spectre (top photo) and was coined years ago
    during observations held on the Hartz Mountains in Germany. If the apex
    of the shadow is surrounded by a luminous halo then this is referred to
    as a Glory (bottom photo), which can often be seen from the window
    seat on a commercial jet. The Glory, like the Brocken Specter is an
    antisolar phenomenon, and both result from the diffraction of
    sunlight.

    According to atmospheric physicist Robert Greenler, the halos drawn on
    the heads of the saints in art history seem to be an
    interpretation/reproduction of the Glory. Based on a theory formulated
    by Van De Hulst H. C, the rings of the Glory are formed by water
    droplets or minute ice crystals found in stratus-type clouds. The
    radius of the concentric rings can vary from a minimum of 1.2° to a
    maximum of 8.3°. Photos taken on December 28, 2022.

    Photo details: Nikon Z9 camera; ISO 32; optic Nikon S14-12/2.8 lens;
    f/4.5).


    Viterbo Airport, Italy Coordinates: 42.436111, 12.061667


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    Atmospheric Effects Links

    * Atmospheric Optics
    * Optic Picture of Day: Gruppo Astrofili Galileo Galilei
    * Color and Light in Nature
    * The Colors of Twillight and Sunset
    * Refraction Index
    * Image Gallery: Atmospheric Effects
    * What is a Rainbow?

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

    https://epod.usra.edu

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