• ES Picture of the Day 25 2021

    From Black Panther@21:1/186 to All on Mon Jan 25 11:01:22 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.


    Methane Bubbles Frozen in an Alaskan Marsh

    January 25, 2021

    Pm_bubbles_epod

    Photographer: Gabrielle Tepp
    Summary Author: Gabrielle Tepp

    Before the winter snow starts falling, a frozen marsh or lake can be a
    beautiful sight. Bacteria living off the organic matter at the
    bottom of the marsh releases methane gas, which creates white
    bubbles when frozen in ice, as shown above. How the bubbles appear
    in the frozen ice is dependent on the rate of the gas release and
    also the rate at which the ice forms. If the gas release is relatively
    slow, the bubbles will freeze in a vertical stream with layers of
    ice in between bubbles, as in the center photo. If the gas is released
    faster than the ice freezes, the gas bubbles build up and grow into
    larger bubbles or more complex patterns, as seen in the right photo.
    The frozen bubble streams can also capture a snapshot of just how the
    water was flowing as the ice was expanding. I enjoy skating or walking
    around the marsh to see how the bubbles differ in each pond. Photos
    taken on November 3, 2020, at Potter Marsh in Alaska.
    * Potter Marsh, Alaska Coordinates: 61.0561, -149.7972

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    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 5 weeks, 5 days, 21 hours, 28 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Thu Feb 25 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.


    Opalescent Fossil Shells

    February 25, 2021

    Fossil shells

    Photographer: Mila Zinkova
    Summary Author: Mila Zinkova

    Seen above are two opalised fossil shells found in Coober
    Pedy, Australia. The name Coober Pedy comes from the Aboriginal words
    kupa pity and means "white man in a hole" because the opals are
    collected in mines. These opals were first discovered in 1915 by an
    accident when a teenage boy found a few rocks while his father and he
    were looking for gold. The opalescent play-of-color in these gems
    can be seen In this video.

    Photo Details: Camera: Apple iPhone 6; Software: Adobe Photoshop CS3
    Windows; Exposure Time: 0.0037s (1/273); Aperture: ƒ/2.2; ISO
    equivalent: 32; Focal Length (35mm): 75
    * Coober Pedy, Australia Coordinates: -29.0103, 134.75769

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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
    * 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 10 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 25 11:14:56 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.


    Panoramic View of Villarrica Volcano and the Southern Sky

    March 25, 2021

    Pano Orion-Escorpion Volcan Villarrica

    Photographer: Cari Letelier
    Summary Authors: Cari Letelier; Jim Foster

    Featured above on this panoramic view is one of Chile’s most active
    volcanoes, the Rukapillán ( Villarrica) Volcano, shown beneath a
    canopy of stars and the glow of the Milky Way, as observed on
    January 17, 2021. A sacred Mapuche sculpture known as a
    Chemamull is in the foreground at lower left.

    To the upper right of Villarrica volcano can be found the Magellanic
    Clouds ( Small Magellanic Cloud and Large Magellanic Cloud),and
    to the upper right of the Large Cloud is the bright star Canopus.
    The constellation of Orion is at lower right, and above it to the
    left is Sirius, the brightest star in the night sky.
    * Pucon, Chile Coordinates: -39.2723, -71.9776

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    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 14 weeks, 1 day, 20 hours, 41 minutes
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  • From Black Panther@21:1/186 to All on Tue May 25 11:00:40 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.


    17-Year Cicadas in 2021

    May 25, 2021

    Cin_cicadas_IMG_6131 (005)a

    Cin_cicadas_IMG_6125 (004)a

    Photographer: Cindy Sun

    Summary Author: Jim Foster

    Brood X cicadas are now emerging by the multitudes in the Middle
    Atlantic and Mid-West regions of the U.S. Shown above are the throngs
    of juveniles that surfaced from beneath a silver maple tree at my
    home. Once above ground they quickly shed their encasements and then as
    red-eyed adults (bottom photo) start a several week period of
    courtship. The screeching mating call made by the males can reach
    decibel levels near 90. While this call is annoying to most humans it
    obviously works for the females of the cicada species. To hear
    their "chorus" and see them emerging click here.

    Because almost everything eats these tasty morsels, their survival
    strategy is to overwhelm predators by popping out of the ground by the
    millions, in a matter of just a few days. This strategy is called
    predator satiation. They don’t do lasting damage to the mature
    trees they alight upon, but their egg-laying and sheer numbers can
    injure young trees, particularly newly planted trees that bear
    fruit or bloom in spring, such as the one that for some reason I
    decided to plant earlier this spring.



    Silver Spring, Maryland Coordinates: 38.9907, -77.0261



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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

    --- up 2 weeks, 4 days, 12 hours, 15 minutes
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  • From Black Panther@21:1/186 to All on Fri Jun 25 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.


    Beautiful Colors of the Hollyhock

    June 25, 2021

    Menashe_Picture1

    Menashe_Picture2

    Photographer: Menashe Davidson

    Summary Author: Menashe Davidson

    Alcea setosa ( Bristly Hollyhock) is prominent in springtime in the
    Middle East. Its impressively colored and large flowers are arranged
    along a conspicuous, inflorescent stalk (top photo). I’ve been able
    to domesticate this wild plant in my garden apartment (growing them in
    containers) in Rishon LeZion, Israel.

    Each flower extends about 3-5 inches (7.5-12.5 cm) when its fully open.
    Overlapping petals allow the flower to attain the shape of a funnel
    that acts to guide pollinators toward the flower’s interior, where its
    reproductive organs and nectar are found (bottom photo). Each
    individual flower has both male and female organs ( hermaphroditic).
    But the flowers avoid self-pollination by having the male and female
    organs mature at different times. So, by the time the female is
    receptive, the pollen of the same flower is gone, and only pollen
    from another flower can do the job. Photos taken on April 2, 2021.


    Rishon LeZion, Israel Coordinates: 31.9730, 34.7925


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    Plant Links

    * Discover Life
    * Tree Encyclopedia
    * What are Phytoplankton?
    * Encyclopedia of Life - What is a Plant?
    * USDA Plants Database
    * University of Texas Native Plant Database
    * Plants in Motion
    * What Tree is It?

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

    https://epod.usra.edu

    --- up 7 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 25 11:00:24 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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    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 11 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 Sat Sep 25 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 - Monarch Butterfly and Chrysalis

    September 25, 2021

    6a0105371bb32c970b01901ec5a4ad970b

    Every weekend we present a notable item from our archives.

    This EPOD was originally published September 8, 2013.

    Photographer: Bill Schultz MD
    Summary Authors: Bill Schultz MD; Jim Foster

    The photo above shows a nearly fully formed Monarch butterfly as
    seen through the wall of its chrysalis shortly before emerging. It
    was taken from Stonecreek, Ohio on September 22, 2012. The chrysalis is
    the pupa stage of a butterfly's lifecycle. A Monarch chrysalis
    is usually attached to a milkweed plant ( Asclepias syriaca) --
    Monarchs and milkweeds are intimately linked. Soon after this
    Monarch emerged, it began its extraordinary 2,260 mi (3,640 km)
    migration to the highlands of central Mexico. It's the great-great
    descendant of the Monarch that left for Mexico the previous fall.

    Photo details: Camera Model: NIKON D300; Focal Length: 105.0mm (35mm
    equivalent: 157mm); Aperture: f/9.0; Exposure Time: 0.0031 s (1/320);
    ISO equiv: 800.
    * Stonecreek Ohio, Coordinates: 40.3975, -81.5589

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    Plant Links

    * Discover Life
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    * Encyclopedia of Life - What is a Plant?
    * USDA Plants Database
    * University of Texas Native Plant Database
    * Plants in Motion
    * What Tree is It?

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

    https://epod.usra.edu

    --- up 3 weeks, 1 day, 21 hours, 55 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Thu Nov 25 11:00:28 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.


    A Many-Colored Fall in Blacksmith Fork Canyon

    November 25, 2021

    Blacksmith102ac_30sep21

    Photographer: Ray Boren

    Summary Author: Ray Boren

    As summer’s long days diminish and temperatures turn crisp, fall colors
    begin to pop on the slopes and in the canyons of North America’s
    Rocky Mountains and the Great Basin of the western United States.
    This photo from near Hyrum, Utah shows the many colors of fall
    taken on Sept. 30, 2021 along the Blacksmith Fork River. The stream
    follows serpentine Blacksmith Fork Canyon generally westward through
    the Bear River Range, a subset of the Wasatch Mountains. The stream
    continues toward the Bear River in Cache Valley, and thus on to the
    West’s terminal inland sea, Great Salt Lake.

    The quilt of autumn colors is created by an intermingling of
    boxelder trees (Acer negundo), bigtooth maples (Acer
    grandidentatum), scrub or gambel oaks (Quercus gambelii), in
    addition to riverside dogwood, willows, shrubs and sedges. The
    deciduous trees have stopped producing chlorophyll, revealing their
    underlying colors. Higher up, forest greens are provided by Douglas
    firs (Pseudotsuga menziesii) and various pines, including pinyon
    pines (likely Pinus monophylla), as well as Utah junipers
    (Juniperus osteosperma).

    In the distance rise steep light-gray cliffs of interbedded
    limestone and dolostone, as well as some sandstones and
    conglomerates. These rock cliffs create the scenic grandeur of
    Blacksmith Fork and nearby Logan Canyon to its north, as they
    thread the Bear River Mountains. These layers were deposited in marine
    environments during the Paleozoic Era’s Devonian, Mississippian and
    Pennsylvanian ages, 299-419 million years ago. Blacksmith Fork’s
    distinctive name has two possible origins, according to John W. Van
    Cott, who compiled a reference book of “Utah Place Names”. One
    source might have been a cache of blacksmithing tools kept in the
    vicinity by mountain man and explorer Jedediah Smith and his brigades
    in the early 1800s for shoeing horses. Other tales mention an actual
    blacksmith, Andrew Anderson, who later worked in the area.
    * Hyrum, Utah Coordinates: 41.6341, -111.8522

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    Plant Links

    * Discover Life
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    * USDA Plants Database
    * University of Texas Native Plant Database
    * Plants in Motion
    * What Tree is It?

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

    https://epod.usra.edu

    --- up 1 week, 6 days, 16 hours, 24 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Sat Dec 25 11:00:40 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.


    Plate Crystal with Simple Extensions

    December 25, 2021

    Snow crystal 2022_0173 (003)

    Photographer: Wilson Bentley

    Summary Author: Jim Foster

    Shown above is a classic, hexagonal plate snow crystal. This lovely
    crystal and hundreds of others photographed by Wilson Alwyn Bentley
    (1865-1931) are housed at the Bentley Snow Crystal Collection in
    the Schwerdtfeger Library, at the University of Wisconsin. Bentley
    was perhaps the first to capture these delicate crystals on prepared
    sets of glass lantern slides.

    According to the Lee/Magano system, the crystal above is classified
    as a plate with simple extensions ( P2e). Snow crystals are
    six-sided because water molecules that form such crystals are
    characteristically arranged in layers of hexagonal rings. This
    results in their eye-catching six-fold symmetry.



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    Cryosphere Links

    * Guide to Frost
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    * 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 2 weeks, 6 days, 20 hours, 43 minutes
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