• ES Picture of the Day 06 2022

    From Black Panther@21:1/186 to All on Thu Jan 6 11:00:32 2022
    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.


    Glass Bottle in the Atacama Desert

    January 06, 2022

    Atacama_UV_Bottle

    Photographer: Malcolm Park

    Summary Author: Malcolm Park

    Several years ago, I was on a guided tour of the Atacama Desert
    during a meteorite hunt when we came across this beautiful violet
    bottle. It was an old, weathered glass bottle and looked like it had
    been left in the desert for years if not more. We had no real
    evidence of how long it had been sitting in the desert, but it seemed
    to all of us that the glass had been stained by the high levels of
    UV radiation that is present in this harsh environment. The
    elevation is about 8,200 feet (2,500 meters) and the weather is always
    sunny with high to extreme UV conditions and no clouds or moisture in
    the air. In fact, the Atacama Desert is known for being the driest,
    hottest desert on Earth with several weather stations never reporting
    precipitation.
    * San Pedro de Atacama, Chile Coordinates: -22.9087, -68.1997

    Related EPODs

    Glass Bottle in the Atacama Desert Preparing for Winter in
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    Climatology Links

    * Aerosols: Tiny Particles, Big Impact
    * JetStream - An Online School for Weather
    * Climate History
    * National Centers for Environmental Information
    * Global Climate Animations
    * NOAA Climate Analysis Branch
    * Vital Climate Graphics

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

    https://epod.usra.edu

    --- up 4 weeks, 4 days, 20 hours, 43 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Sun Feb 6 11:01:14 2022
    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 - Pancake Rocks, New Zealand

    February 05, 2022

    6a0105371bb32c970b015439070ae1970c

    Every weekend we present a notable item from our archives.

    This EPOD was originally published January 2, 2012.

    Photographer: Enver Murad
    Summary Author: Enver Murad
    Paparoa National Park on New Zealand’s west coast near the small
    town of Punakaiki is renowned for its limestone cliffs and
    karst phenomena such as caves and underground streams. Formation of
    the famous Pancake Rocks began during the Tertiary period when
    carbonate-rich fragments of marine plant and animal skeletons were
    deposited on the seabed some 30 million years ago. The resultant
    alternating layers of hard and soft limestone and mudstone were
    eventually solidified and raised above sea level. Wind, rain and acidic
    waters finally carved today’s spectacular formations out of the solid
    rock, giving the appearance of stacked pancakes.
    * Pancake Rocks, New Zealand Coordinates: -42.10833, 171.33611

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    Geology Links

    * Earthquakes
    * Geologic Time
    * Geomagnetism
    * General Dictionary of Geology
    * Mineral and Locality Database
    * Mohs Scale of Mineral Hardness
    * This Dynamic Earth
    * USGS
    * MyShake - University of California, Berkeley
    * 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 9 weeks, 20 hours, 43 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Sun Mar 6 11:00:32 2022
    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 - Red Beach, Peru

    March 05, 2022

    6a0105371bb32c970b01a3fd108e02970b

    Every weekend we present a notable item from our archives.

    This EPOD was originally published on June 23, 2014.

    Photographer: Samuele Gasparini
    Summary Authors: Samuele Gasparini; Jim Foster

    Shown above is Red Beach, part of the Paracas National Reserve, on
    the barren shores of the Pacific Ocean in Peru. The red
    coloration of the beach is attributed to pink granodiorite that
    has eroded out of the nearby cliffs of Punta Santa Maria by wave
    action, forming a reddish pebble-sand mix. The carmine color of the
    beach contrasts with the tans and browns of the adjacent coastal
    cliffs. Over 200 migratory bird species and approximately 3 dozen
    species of land and marine mammals are found in the Paracas
    Reserve. Photo taken on August 9, 2011.

    Photo details: Camera Maker: FUJIFILM; Camera Model: FinePix S2000HD;
    Focal Length: 5.0mm; Aperture: f/7.0; Exposure Time: 0.0020 s (1/500);
    ISO equiv: 100; Software: Adobe Photoshop CS5 Windows.
    * Red Beach, Peru Coordinates: -13.8959, -76.296703

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    Geology Links

    * Earthquakes
    * Geologic Time
    * Geomagnetism
    * General Dictionary of Geology
    * Mineral and Locality Database
    * Mohs Scale of Mineral Hardness
    * This Dynamic Earth
    * USGS
    * MyShake - University of California, Berkeley
    * 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 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Wed Apr 6 12:01:08 2022
    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.


    Muonionalusta Siderite Sample

    April 06, 2022

    Muonionalusta-siderite-iva

    Photographer: Thierry Lombry

    Summary Author: Thierry Lombry

    This photo showcases a specimen of Muonionalusta siderite found
    in Sweden in 1906, of which 500 pounds (230 kilograms) were collected.
    The sample above weighs 338 grams and measures 3.2 x 2.6 x 1.1 inches
    or 8.13 x 6.6 x 2.8 centimeters, making its density 7.5 g/cm^3.
    Siderites are iron meteorites and this sample fell approximately 1
    million years ago. Originating 4.56 billion years ago, this family is
    one of the oldest meteorites.

    This specific specimen contains more than 91% iron - which explains
    the difficulty in cutting and polishing it - 8.4% nickel and traces
    of rare elements (0.33 ppm of gallium, 0.133 ppm of germanium
    and 1.6 ppm of iridium) . It is an example of a fine
    octahedrite (Of), the most widespread of the siderites, of group IV
    A. Being a metamorphic meteorite, it formed in the heart of an asteroid
    of 31 to 68 miles (50 to 110 km) in radius that exploded following a
    collision. Crystallization occurs after the metal has melted. Cut,
    polished and acid etched, this siderite sample features the
    Widmanstätten pattern that formed in temperatures between 1000 and
    700 Kelvin. To preserve its quality, this specimen has been treated and
    protected against corrosion since rust would appear within 6 months if
    left exposed.

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    Geology Links

    * Earthquakes
    * Geologic Time
    * Geomagnetism
    * General Dictionary of Geology
    * Mineral and Locality Database
    * Mohs Scale of Mineral Hardness
    * This Dynamic Earth
    * USGS
    * MyShake - University of California, Berkeley
    * 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 5 weeks, 2 days, 21 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Fri May 6 12:01:28 2022
    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.


    Devils Fingers

    May 06, 2022


    1 (17)

    Photographer: Mila Zinkova

    Summary Author: Mila Zinkova

    Devil's Fingers ( Clathrus archeri) fungus is described as looking
    like an alien creature that wouldn’t be out of place in a horror movie.
    Usually observed in deciduous forests, the striking Clathrus
    archeri gives the appearance of long red “fingers” emerging from a
    partially buried white ball. This has led to multiple different names
    used to describe this fungus, including Devil's finger fungus,
    Octopus stinkhorn and Helicopter stinkhorn.

    Clathrus archeri reached Europe from New Zealand or Australia around
    the time of WWI. It’s thought to have traveled via war supplies or
    perhaps in wool, having first been observed in Europe around 1914. In
    1982 it was also found in California, where it may have been
    transported with bamboo or other exotic plants. Click here to see a
    video of this fungus.
    -
    Earth Science Picture of the Day is a service of the Universities
    Space Research Association.

    https://epod.usra.edu

    --- up 9 weeks, 4 days, 21 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Mon Jun 6 12:00:48 2022
    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.


    Solar Halo Above Eastern Slovakia

    June 06, 2022


    DSC_0053

    Photographer: Róbert Hlava

    Summary Authors: Róbert Hlava; Jim Foster

    Shown above is an eye-catching 22-degree solar halo and glitter
    path that I observed over eastern Slovakia on the morning of January
    18, 2020. Halos such as this one may result when hexagonal ice
    crystals, either in cirrus clouds or freely falling through the
    lower atmosphere ( diamond dust), act like miniature prisms,
    refracting and dispersing sunlight. If the axis of a pencil-shaped
    crystal is approximately perpendicular to the direction of sunlight, a
    ray of sunlight will pass through two of the crystal’s side faces
    and be refracted roughly 22 degrees. Millions of these more-or-less
    randomly oriented crystals form circular halos.

    I was ecstatic to be able to witness both the atmospheric halo and the
    glitter path on the ice-covered lake. Nature always seems to offer new
    surprises for us. Make sure to protect your eyes when looking
    toward the Sun.

    Photo details: Nikon D5300 camera; 11mm; F13; 1/250 second exposure;
    ISO 100.
    * Rožkovianský rybník, Sabinov Slovakia Coordinates:
    49.106111, 21.085556

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    Atmospheric Effects Links

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    * 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

    --- up 14 weeks, 21 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Wed Jul 6 12:01:08 2022
    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.


    Cloud Corona Over the SIerra Nevada

    July 06, 2022

    IMG_1428

    Photographer: Roberta Piazza Gordon

    Summary Authors: Roberta Piazza Gordon; Cadan Cummings

    Shown above is a cloud corona spotted on a spring morning in the
    Sierra Nevada mountain range of California. Coronae are formed when
    cloud droplets diffract incoming light from the Sun or Moon, which
    produces a colorful region of light interference. Typically, the
    most vividly colored coronae are produced by tiny cloud droplets that
    are uniform in size. Remember to always take safety precautions
    when viewing the Sun. Photo taken on March 15, 2022.

    * Kernville, California Coordinates: 35.755, -118.425

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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

    --- up 18 weeks, 2 days, 21 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Sat Aug 6 12:00:28 2022
    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.


    Mudcracks: Now and Then

    August 05, 2022


    Mudcracks

    Photographer: Marli Miller
    Summary Author: Marli Miller
    One of the wonderful things about sedimentary rocks is that they
    record the conditions at Earth's surface when they’re deposited -- and
    one of the most recognizable features are mudcracks. As we all can
    see, mudcracks form as wet, fine-grained sediment dries out, as shown
    by the top photo of a shoreline in the Amargosa Valley of
    southeastern California (taken in April 2022).

    The bottom photo shows mudcracks in the Proterozoic-age
    Snowslip Formation of Glacier National Park in Montana (taken
    in July 2013). These rocks, deposited in northern Montana's Belt
    Basin between about 1.4 and 1.5 billion years ago, likely formed near
    the shoreline of a shallow inland sea where the sediment was similarly
    periodically wet and dry.

    Amargosa Valley, California Coordinates: 36.58001, -116.44487

    Glacier National Park, Montana Coordinates: 48.7596, -113.7870


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    Geology Links

    * Earthquakes
    * Geologic Time
    * Geomagnetism
    * General Dictionary of Geology
    * Mineral and Locality Database
    * Mohs Scale of Mineral Hardness
    * This Dynamic Earth
    * USGS
    * MyShake - University of California, Berkeley
    * 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 22 weeks, 5 days, 20 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Tue Sep 6 12:01:18 2022
    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.


    Wagon Tracks from the Old West?

    September 06, 2022


    Glacial striations

    Photographer: Brian Sauls
    Summary Author: Brian Sauls
    No, these aren’t wagon tracks from the Old West. They’re glacial
    striations, or grooves, that were caused by abrasion from rock
    fragments embedded in the base of an alpine glacier that once
    flowed in a valley near north-central Colorado’s Green Mountain
    Reservoir. These striated and polished rocks consist predominantly of
    migmatite, which is an igneous/metamorphic rock exhibiting
    alternating bands of light and dark-colored minerals that formed
    approximately 1.8 billion years ago, during the Precambrian Era.
    They have the appearance of a marble cake and are well exposed due to
    the relatively recent glacial erosion. Based on the orientation of
    the grooves, one can determine the direction that the glacier flowed.
    Photo taken in the summer of 1981.
    Photo details: Nikon FM camera; Vivitar 24mm f/2.0 lens; Kodak slide
    film; digitized with Kodak slide scanner.


    Green Mountain Reservoir Colorado Coordinates: 39.798056, -106.349444

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    Geology Links

    * Earthquakes
    * Geologic Time
    * Geomagnetism
    * General Dictionary of Geology
    * Mineral and Locality Database
    * Mohs Scale of Mineral Hardness
    * This Dynamic Earth
    * USGS
    * MyShake - University of California, Berkeley
    * 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 27 weeks, 1 day, 21 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Thu Oct 6 12:01:06 2022
    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.


    Thunderstorm and Rainbow over Zagreb, Croatia

    October 06, 2022

    20220911_174956-01

    20220911_190042-01

    Photographer: Neven Tandaric
    Summary Authors: Neven Tandaric; Jim Foster
    The photo at top shows the approach of a nasty thunderstorm over
    Zagreb, Croatia, as observed on September 11, 2022. Note that the
    precipitation shaft associated with this storm cell is quite
    obvious and is likely an indication of strong winds.

    The bottom photo shows a beautiful high-arching rainbow that could
    be seen as the storm departed. A portion of the secondary rainbow
    is clearly visible at upper right. This fainter bow results from a
    second internal reflection in the raindrops. The darker strip of sky
    between the primary and secondary bows is known as Alexander's Dark
    Band.

    Zagreb, Croatia Coordinates: 45.7974397, 15.9399371


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    Atmospheric Effects Links

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    * 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

    --- up 31 weeks, 3 days, 21 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Sun Nov 6 11:00:38 2022
    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.


    Wafer Thin Moon and Pumpkin Sky

    October 31, 2022


    MatthewC_DSC_1834s2s

    THANKS FOR VISITING EPOD. THE BLOG SERVICE IS HAVING A TECHNICAL ISSUE.
    WE HOPE TO RESOLVE THIS WITH OUR SERVICE PROVIDER SOON.

    Photographer: Matthew Chin
    Summary Author: Matthew Chin; Jim Foster
    Can you spot the sliver of the crescent Moon? Because it was only about
    1.3% illuminated when this photo was snapped, at dawn on June 28, 2022,
    it isn’t exactly conspicuous against the pumpkin-colored sky. As night
    has now lost its grip, hordes of bats are returning to their caves
    (could this be the source of the dark smudge at lower right?) and other
    spooky, nocturnal creatures will soon be asleep in their lairs. Photo
    taken in Yuen Long, Hong Kong, on June 28, 2022, at 05:12 a.m. local
    time.

    Yuen Long, Hong Kong Coordinates: 22.4445, 114.0222


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    * 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 35 weeks, 6 days, 20 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Tue Dec 6 11:01:14 2022
    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.


    Double Cloud Shadow off the Coast of Croatia

    December 06, 2022

    _DSC7607-copy.png1440

    Photographer: Maja Kraljik
    Summary Author: Maja Kraljik; Jim Foster
    As I photographed a cumulus congestus cloud over the northwestern
    Adriatic Sea, off the coast of Croatia, I noticed that it was backlit
    by the near mid-day Sun. As this cloud grew and developed, an
    eye-catching double shadow began to appear immediately above it.
    Projected shadows may be observed when the cloud’s shadow is cast upon
    a thin layer of dust, haze or other aerosols. In this case
    the source of dust was likely the Sahara Desert. Such shadows are
    typically seen when looking within about 10 degrees of the solar
    disk. Note also the crepuscular rays -- above the cloud top. Photo
    taken on October 3, 2021, at 11:30 a.m. local time.

    Photo details: ISO 80; f8; 1/250 second exposure.

    Northwest Adriatic Sea, Croatia Coordinates: 45.442096, 13.508952


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    * 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

    --- up 40 weeks, 1 day, 21 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)