• ES Picture of the Day 24 2021

    From Black Panther@21:1/186 to All on Sun Jan 24 11:00:46 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 - Afternoon Analemma for Athens

    January 23, 2021

    Analemma1600

    Every weekend we present a notable item from our archives. This EPOD
    was originally published January 23, 2004.

    Provided by: Anthony Ayiomamitis
    Summary authors & editors: Anthony Ayiomamitis; Jim Foster

    The image above is a set of 44 multi-exposures on the same frame of
    film taken from January through December of 2003, in Athens, Greece at
    precisely 16:00:00 Local Meridian Time (the foreground was added
    later). This analemma represents the motion of the Sun during the
    course of one year as observed in the late afternoon. As a result of
    the Earth's tilt about its axis (23.5 degrees) and its elliptical orbit
    about the Sun, the position of the Sun in the sky changes from one day
    to the next, even when observed at the same time on each day of the
    year. Furthermore, the figure 8 loop the Sun makes in the sky over a
    12-month period (analemma) will be inclined at different angles
    depending on one's geographical latitude. The latitude of Athens is
    approximately 38 degrees. Imaging the Sun over a given location for an
    entire year is a demanding photographic accomplishment indeed -- few
    such attempts have been successful.


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    * NASA Solar Dynamics Observatory
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    -
    Earth Science Picture of the Day is a service of the Universities
    Space Research Association.

    https://epod.usra.edu

    --- up 5 weeks, 4 days, 21 hours, 27 minutes
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  • From Black Panther@21:1/186 to All on Wed Feb 24 11:00:46 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.


    Development of a Zinnia Flower

    February 24, 2021

    TOP

    BOTTOM

    Photographer: Menashe Davidson
    Summary Author: Menashe Davidson

    When you take a flower in your hand and really look at it, it’s your
    world for the moment
    - Georgia O’Keeffe

    In nature, flowers have a simple purpose: reproduction. Insects are
    lured into their pollen-filled centers to facilitate the plant’s
    fertilization and survival. Coincidentally, humans are attracted by
    the harmonious colors, soft curves, fragrance and symmetrical forms
    of flowers.

    Zinnias (family compositeae) convert all their shoots on every
    stem into flowering branches and have a single flower head (top).
    The head consists of small, fertile, symmetrical flowers gathered in
    the central disk ( disk florets), surrounded by a petal-shaped row
    of infertile and asymmetrical flowers ( ray florets, in the
    periphery). Very popular in horticulture, zinnias are excellent plants
    to have in my apartment garden. With them close by, I'm able to
    photograph all stages of growth (bottom). In these pictures, I focused
    on the core of the flower's head (capitulum) as it matured. The
    resulting photos show the magnificent beauty of the variable shapes,
    colors and curves.
    Like the painter O'Keeffe said, it became my world for many moments.
    * Rishon LeZion, Israel Coordinates: 31.9730, 34.7925

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

    https://epod.usra.edu

    --- up 10 weeks, 21 hours, 27 minutes
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  • From Black Panther@21:1/186 to All on Mon May 24 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.


    Camel Rock, New Mexico

    May 24, 2021


    RickS_IMG_5164A (1)

    Photographer: Rick Stankiewicz
    Summary Author: Rick Stankiewicz
    Featured above is Camel Rock, New Mexico. Found 10 miles (16 km)
    north of Santa Fe, New Mexico, in the foothills of the Sangre de
    Cristo Mountains (along U.S. Highway #285), this obscure, natural
    sandstone formation, to many, resembles a camel resting in the
    desert. It’s easily visible from the highway, but there’s a small
    pull-off if you wish to have a closer look -- now protected by a wire
    fence to avoid vandalism. No matter how you look at it, this
    long-necked, flat-headed “ dromedary” certainly is true to its name.
    Photo taken on October 6, 2013.
    Photo details: Canon EOS Digital Rebel XTi camera; ISO 200; f/10;
    1/200^th second exposure; 28mm (cropped).


    Camel Rock, New Mexico Coordinates: 35.847240, -105.993700


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    * 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 2 weeks, 3 days, 12 hours, 15 minutes
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  • From Black Panther@21:1/186 to All on Thu Jun 24 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.


    Dew Drops on Spider Web

    June 24, 2021

    DSC_0735_5bw

    Photographer: Teresa Molinaro
    Summary Authors: Teresa Molinaro; Jim Foster

    During an excursion on the high Madonie, in Sicily (Italy), my eye
    was drawn to this weathered spiderweb, adorned with shimmering
    drops of dew. All that was required to show it off at its best was
    just a little more light, which was achieved by shooting in black and
    white and slightly increasing the ISO. Because beads of water
    have a tendency to gather at roughened spots on the web, at thread
    intersections for instance, this is where the larger dew drops are
    found. Photo taken on June 14, 2020.
    Photo details: Nikon D3400 camera:105 mm; 1/250 second exposure; f/5.6;
    ISO 400.
    * Parco delle Madonie, Sicily, Italy Coordinates: 37.84861,
    14.0497265

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

    https://epod.usra.edu

    --- up 6 weeks, 6 days, 12 hours, 15 minutes
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  • From Black Panther@21:1/186 to All on Sat Jul 24 11:00:30 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 - Full Moon Over Mount Rainier

    July 24, 2021

    6a0105371bb32c970b0133f3ebedd1970b Every weekend we present a
    notable item from our archives. Inspired by the full moon this weekend,
    we are re-posting this spectacular EPOD originally published September
    9, 2010.

    Photographer: Sally Budack
    Summary Author: Sally Budack; Jim Foster
    The above photo shows the full Moon of July 24, 2010 centered
    directly above the ever picturesque Mount Rainier, Washington. It
    was taken just before sunset some 50 miles (80 km) away in Tacoma,
    Washington. This snow capped composite, or stratovolcano, stands
    14,411 feet (4,392 m) above sea level towering above its surroundings.
    It is the loftiest summit in the Cascade Range. When the Moon is
    near the horizon, it seems to appear larger to us than when it resides
    higher in the sky. This is an illusion, however. It's no bigger
    when perched on the horizon than when overhead. What's different is
    that at the horizon the Moon has a point of reference, and our brain
    processes visual information into a spatial reference frame.

    Photo details: Camera Maker: SONY; Camera Model: DSLR-A100; Focal
    Length: 70.0mm (35mm equivalent: 105mm); Aperture: f/5.6; Exposure
    Time: 0.0040 s (1/250); ISO equiv: 125; Exposure Bias: none; Metering
    Mode: Matrix; Exposure: program (Auto); White Balance: Auto; Flash
    Fired: No; Color Space: sRGB.
    * Mount Rainier Coordinates: 46.85278, -121.76028

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

    https://epod.usra.edu

    --- up 11 weeks, 1 day, 12 hours, 15 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Tue Aug 24 11:00:36 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.


    Bootleg Wildfire Pyrocumulus Cloud

    August 24, 2021


    RLarson_pyro_0 (004)

    Photographer: Ron Larson [ rlarson@ccountry.net]

    Summary Authors: Ron Larson; Jim Foster

    The photo above shows an extensive pyrocumulus cloud taken above
    the Bootleg Wildfire in south-central Oregon, on the afternoon of
    July 16, 2021. Apparently, a similar cloud would build each afternoon
    and dissipate by early evening. At the time the photo was snapped, this
    fire was just 7% contained, having consumed some 250,000 acres
    (101,171 hectares) and with a perimeter stretching approximately 200
    miles (320 km) in length. Over 2,000 fire fighters were called in to
    help battle the Bootleg Fire. Pyrocumulus clouds may form if a fire
    becomes so energetic that it’s essentially creating its own weather.
    Intense heat above the fire initiates an updraft that generates
    convective cells, eventually leading to the formation of these cumulus
    type clouds.
    * Bootleg Wildfire in Oregon: 42.9660 -121.578

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

    https://epod.usra.edu

    --- up 15 weeks, 4 days, 12 hours, 15 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Sun Oct 24 11:00:30 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 - Flosagjá Canyon, Thingvellir National Park, Iceland

    October 23, 2021

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    August 2015 Viewer's Choice Every weekend we present a notable item
    from our archives.

    This EPOD was originally published August 27, 2015.

    Photographer: Tero Marin
    Summary Author: Tero Marin; Jim Foster
    The photo above shows Flosagjá Canyon in Thingvellir National
    Park, Iceland, It's in this rift valley, on the Mid-Atlantic
    Ridge, where the European tectonic plate and the North American
    tectonic plate meet. Both plates are drifting away from each other --
    spreading apart about 1 in (2.5 cm) per year. Thingvellir was chosen in
    the tenth century as a centrally located meeting place for a general
    assembly of the people of Iceland. Photo taken on May 26, 2015.
    Photo Details: Nikon D7100 camera; AF-S Nikkor 12-24 mm, f/4G; 12 mm;
    ISO 400; f/9; 1/320 sec. exposure.
    * Thingvellir National Park, Iceland Coordinates: 64.258056, -21.125

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    * 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 7 weeks, 2 days, 21 hours, 55 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Wed Nov 24 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.


    Northern Lights over the Norwegian Sea

    November 24, 2021

    Aurora4SMALLer

    Photographer: Tomas Slovinsky

    Summary Author: Tomas Slovinsky; Cadan Cummings

    One of my biggest dreams- even before I became an astronomy popularizer
    and photographer- was to see the northern lights. The picture above
    was taken near Tromsø, Norway in October 2021. These spectacular
    displays- also called the aurora borealis in the northern
    hemisphere and aurora australis in the southern hemisphere- are the
    result of energetic particles emitted by the Sun colliding with the
    Earth’s magnetic field and atmosphere. Our planet’s magnetic field
    protects us from most of these energetic particles, however, the
    magnetic shield converges at the north and south poles and lets
    some of this energy hit the Earth’s atmosphere. Once interacting with
    our outer atmosphere, these particles collide with oxygen to create
    green and red light.

    Thanks to my friends, this dream of seeing the northern lights in
    person came true. Our polar trip headed first to Sweden, but our
    first days were mostly hopeless as the weather in Abisko was cloudy
    and snowy. Decision then was one and only - to get a trip much north,
    in Tromsø, Norway. The experience was magnified when I finally met
    legendary Adrien Mauduit, a great astrophotographer and
    cinematographer. He was the one who kept me, Petr Horálek, Josef Kujal
    and Balazs Szarka in hope for hours before the aurora truly appeared.
    Adrien told us "Just wait, it is about to come - something amazing" and
    I had never been so grateful as when I finally saw he was right. The
    dynamics, intensity, colors visible even by the moonlight made this one
    of my lifetime experiences so far. If you like the image, trust me that
    the personal experience is far better! Hopefully not my last, I am sure
    I want to see it again. This is one of moments you know it was worth to
    live for!
    * Tromsø, Norway Coordinates: 69.6498, 18.9841

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

    https://epod.usra.edu

    --- up 1 week, 5 days, 16 hours, 24 minutes
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  • From Black Panther@21:1/186 to All on Fri Dec 24 11:00:36 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.


    Austrian Alps – The Sound of Music

    December 24, 2021

    2021 October 9 - Werfen Austria Sound of Music Trail & Views 1

    2021 October 9 - Werfen Austria Sound of Music Trail & Views 2

    Photographer: Cindy Todd

    Summary Author: Cindy Todd

    This scenic photo of the Alps was taken near the city of
    Werfen, Austria. The region is best known for its picturesque
    mountain views, the Hohenwerfen Castle, and serving as a filming
    location for the movie The Sound of Music. Just to be clear, the
    hills are not alive with the sound of music- or at least they were
    not while I was there. But despite this, the views were breathtaking
    and it was thrilling to hike along the Sound of Music trail that
    leads to the famed meadow scene in the movie.

    Werfen is located in the Salzach valley adjacent to the Austrian
    Alps. Geologically, this region of the Alps is primarily made of
    limestone with some quartzite, calcite and muscovite.
    These mountains were formed in the late Tertiary Period, which
    spanned between 66 million to 2.6 million years ago and began with the
    extinction of the non-avian dinosaurs. Photos taken on October 9,
    2021.
    * Werfen, Austria Coordinates: 47.4761, 13.1913

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    * General Dictionary of Geology
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    * 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 2 weeks, 5 days, 20 hours, 43 minutes
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