• ES Picture of the Day 11 2021

    From Black Panther@21:1/186 to All on Mon Jan 11 11:01:00 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.


    The Stone Donkey

    January 11, 2021

    StoneDonkeyAsHowlingWolfForEPOD

    Photographer: Stan Wagon
    Summary Authors: Stan Wagon

    Stone Donkey Arch is a feature in the Navajo sandstone of
    south-central Utah that looks like a donkey. Others have thought
    that the shape is more like a wolf, so it's also known as Howling Wolf
    Arch. This type of arch is called an abandoned arch; such arches (and
    this type includes the world-famous Delicate Arch) are considered
    to be near the end of their life, but they survive due to compression,
    which strengthens the cement-like bonds in the sandstone. The Stone
    Donkey is rather top-heavy, which could have an impact on its lifespan.
    Photo taken October 24, 2020.
    * Stone Donkey Arch, Utah Coordinates: 37.348387, -111.943717

    Related EPODs

    The Stone Donkey Archive - Black Hills Flume Cracked Eggs
    of the Bisti Badlands Puget Sound Feeder Bluff Exogenic
    Fulgurites Cedar Breaks: A Rainbow in Stone
    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 3 weeks, 5 days, 21 hours, 27 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Thu Feb 11 11:00:42 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.


    Nightscape Above Pieve di Cadore, Italy

    February 11, 2021

    Senza titolo-8w-4

    Photographer: Alessandra Masi
    Summary Author: Alessandra Masi

    Featured above is the beautiful conjunction of Jupiter and Saturn
    in the southwestern sky juxtaposed with the waxing crescent Moon,
    in the southeast. At the time the photos were snapped, the Moon was
    enshrouded by a corona. Prominent at bottom center is the charming
    town of Pieve di Cadore (elevation of 2,880 ft or 878 m) in the heart
    of the Dolomite range. It’s the birthplace of the famous painter,
    Tiziano Vecellio. Note that the Sfornioi Nord mountain is in
    the background, at left.

    Photo Details: Canon 5D Mark III camera; 70/300 at 135. Sky – ISO from
    400-1000 and exposure from 0.8-3.0 seconds (to enhance the lunar corona
    and capture the details of Jupiter and Saturn). Landscape – ISO from
    320-400 and exposure from 5-114 seconds.
    * Pieve di Cadore, Italy Coordinates: 46.4288, 12.3739

    Related EPODs

    Nightscape Above Pieve di Cadore, Italy The Quadrantids
    Mars and Moon Conjunction of October 28, 2020 Super Conjunction
    of Jupiter and Saturn Twilight Sky at Dawn and Venus Into the
    Past: Milky Way Mosaic
    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 8 weeks, 1 day, 21 hours, 27 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Thu Mar 11 11:00:44 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.


    Snowflakes and Symmetry

    March 11, 2021

    Snowflake on window 2 012721

    Photographer: John Stetson
    Summary Author: John Stetson

    This newly fallen, dendritic snowflake was photographed when it
    landed on a pane of glass at my home on Sebago Lake, Maine. On
    extremely cold days, I often walk around outside looking for frost on
    windows, and each time it snows I also look for snowflakes like this
    one, which was captured on January 27, 2021.

    A snow crystal’s six-sided symmetry always seems to get our
    attention. But why? Here is a quote from Alan Lightman, the author
    of Einstein's Dreams: "Why do we human beings delight in seeing
    perfectly round planets through the lens of a telescope and
    six-sided snowflakes in winter? ... I would claim that symmetry
    represents order and we crave order in this strange universe we find
    ourselves in. ... Symmetry is also economy. Symmetry is simplicity.
    Symmetry is elegance."
    * Sebago Lake, Maine Coordinates: 43.8537, -70.5621

    Related EPODs

    Snowflakes and Symmetry Cracks in the Ice on Utah Lake
    Archive - A Day at the Beach Archive - Ice Coring on Lake
    Placid Archive - Frozen Breath Fascinating Ice Patterns
    More...

    Cryosphere Links

    * Guide to Frost
    * What is the Cryosphere?
    * Bentley Snow Crystals
    * Glaciers of the World
    * Ice, Snow, and Glaciers: The Water Cycle
    * The National Snow and Ice Data Center Google Earth Images
    * Snow and Ice Crystals

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

    https://epod.usra.edu

    --- up 12 weeks, 1 day, 21 hours, 27 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Tue May 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.


    April Snow in Dolly Sods, West Virginia

    May 11, 2021


    DollySods

    Photographer: Chip Chase

    Summary Author: Robert Leffler

    The photo above showing red spruce and other conifers decked out in
    snow was captured following a 6-8 inch (15-20 cm) snowfall in the
    Dolly Sods Wilderness of West Virginia. It was taken on April 2,
    2021. Dolly Sods, a high altitude plateau ranging from
    approximately 2,500 to 4,700 ft (760 to 1,430 m), forms the eastern rim
    of Canaan Valley, one of the highest valleys in the eastern U.S.


    Dolly Sods Wilderness Area, West Virginia Coordinates:
    38.995833, -79.368056


    Related EPODs

    April Snow in Dolly Sods, West Virginia Ice Falls in Valganna,
    Italy Ice Cover and Ice-Out on Sebago Lake During the Winter of
    2021 Archive - LaCrosse Ice Falls Backyard Avalanche Frost
    Pattern on Cold Window
    More...

    Cryosphere Links

    * Guide to Frost
    * What is the Cryosphere?
    * Bentley Snow Crystals
    * Glaciers of the World
    * Ice, Snow, and Glaciers: The Water Cycle
    * The National Snow and Ice Data Center Google Earth Images
    * Snow and Ice Crystals

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

    https://epod.usra.edu

    --- up 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 Fri Jun 11 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.


    Altocumulus Cloud Deck Above Varese, Italy

    June 11, 2021


    Nuvolette

    Photographer: Michela Meda

    Summary Authors: Michela Meda; Jim Foster

    Shown above is an altocumulus cloud deck as observed over Carnago,
    Varease, Italy. These mid-level clouds form between about 8,200 to
    19,600 ft (2,500 m to 6,000 m) when strong winds are aloft. Composed of
    tiny, supercooled water droplets, they often presage a change in
    weather, such as the as the arrival of a cold front. Photo taken on
    November 23, 2020.

    Carnago (Varese), Italy Coordinates: 45.7225, 8.8412


    Related EPODs

    Altocumulus Cloud Deck Above Varese, Italy Wave Clouds over
    Northwestern Washington State A Bountiful Flock of Floccus Clouds
    Pink Virga Helical Clouds Archive - South Sandwich Wakes
    More...

    Cloud Links

    * Atmospheric Optics
    * The Cloud Appreciation Society
    * Cloud Atlas
    * Color and Light in Nature

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

    https://epod.usra.edu

    --- up 5 weeks, 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 Jul 11 11:00:34 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 - Web Iridescence

    July 10, 2021

    6a0105371bb32c970b0134853c2904970c

    Every weekend we present a notable item from our archives. This EPOD
    was originally published July 7, 2010.

    Photographer: John Adam
    Summary Author: John Adam

    July 2010 Earth Science Picture of the Day Viewer's Choice This
    picture of a carefully constructed spider web was taken in
    Washington Oaks Gardens State Park, Flagler County, Florida. It was
    about 10 inches (25 cm) in diameter and exhibited greenish and pink
    iridescence when the viewing angle was just right. Depending on
    where I stood, I could see more pinks than greens, or vice versa. The
    thinly spun web acts as a type of circular diffraction grating,
    each thread being about the right diameter (several microns or
    less) to diffract (or deflect) sunlight. Such threads are also of
    interest to the photonics industry. Notice also the central hole
    where the spider sits has only radial threads; only the transverse
    threads are sticky, so the spider can easily apprehend any unfortunate
    prey by a rapid radial maneuver! Photo taken in May of 2010.

    Photo Details: Camera Maker: OLYMPUS IMAGING CORP.; Camera Model:
    SP570UZ; Focal Length: 55.0mm; Aperture: f/4.6; Exposure Time: 0.010 s
    (1/100); ISO equiv: 200; Exposure Bias: none; Metering Mode: Matrix;
    Exposure: Creative Program (based towards depth of field); White
    Balance: Auto; Flash Fired: No; Color Space: sRGB
    * Washington Oaks Gardens Coordinates: 29.635, -81.20389

    Related EPODs

    Archive - Web Iridescence Dew Drops on Spider Web 17-Year
    Cicadas in 2021 Fireflies in Nuevo León, México The Strength of
    Spider Silk Iridescent Wings of a Hoverfly
    More...

    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

    --- up 9 weeks, 2 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 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! (21:1/186)
  • From Black Panther@21:1/186 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! (21:1/186)