• ES Picture of the Day 22 2021

    From Black Panther@21:1/186 to All on Fri Jan 22 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.


    Iridescent Wings of a Hoverfly

    January 22, 2021

    Firfly wings

    Photographer: Juan Manuel Pérez Rayego
    Summary Authosr: Juan Manuel Pérez Rayego; Jim Foster

    The photo above shows a long hoverfly ( Sphaerophoria scripta)
    pollinating a flower in a garden near Merida, Spain. Even in late
    November, when this photo was captured, these flies are active
    pollinators when weather conditions are favorable. Note its gauzy,
    iridescent wings. The pastel coloration results from
    diffraction of sunlight rather than pigment permeation. In essence,
    the ultra-thin wings act to broaden dispersed sunlight, causing
    colors to overlap.
    * Merida, Spain Coordinates: 38.9394, -6.3652

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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 5 weeks, 2 days, 21 hours, 27 minutes
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  • From Black Panther@21:1/186 to All on Mon Feb 22 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.


    A Conglomeration of Witches and Wonders

    February 22, 2021

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    2222222222
    Photographer: Ray Boren
    Summary Author: Ray Boren

    In June 1858, the U.S. Army’s Capt. Albert Tracy descended northern
    Utah’s Echo Canyon and emerged at a junction with the Weber
    River and Weber Canyon. His party set up camp opposite what they
    called Witch Rocks. The stone pillars “jut upwards through the smooth
    surface of a rounded hill, and form a cluster,” he wrote in his
    journal, “so singularly like figures in kirtles [long skirts] and
    steeple-hats or bonnets that they have received the appellation
    stated.” As recorded on roadside signs below the site today, Tracy
    mistakenly identified the reddish-yellow rocks as being basalt. But
    his description of the scene remains apt, as shown in the first
    photograph here of The Witches (also known as Witch or Witches
    Rocks, as well as Witch or Witches Bluffs), taken on Oct. 4, 2020,
    above Interstate 84 between the rural communities of Echo and Henefer.

    Geologists now identify the outcrops as features of the Henefer
    Formation. Like the nearby Echo Canyon Conglomerate, the formation
    is chunky evidence of western North America’s mountain-building
    Sevier Orogeny, which occurred during the Late Cretaceous 85-90
    million years ago, preceding and somewhat overlapping the Rocky
    Mountains’ Laramide Orogeny. Unlike the familiar, fine-grained
    red-rock sandstone landscapes of the Colorado Plateau to the south,
    these mixed- clastic conglomerates are, according to the
    Utah Geological Survey, loaded with quartzite pebbles, cobbles
    and even boulders, as well as sandstones and mudstones, carried as
    sediments off the Sevier highlands that once rose to the west and
    northwest.

    The Witches are just a few of the fantastic formations in the
    Supplication Hills and in Echo Canyon. Nearby are chimney-like
    Sentinel Rock and, up a hilly rill, Temple Rock Amphitheater,
    reminiscent of the hoodoos of Bryce Canyon National Park, far
    to the southwest. Just to the east along Interstate 80 in Echo Canyon —
    also a natural corridor for Native Americans, Mormon and
    California-bound pioneers, the overland stage, the Pony Express
    and Union Pacific Railroad — are even more wonders. These include
    Monument Rock; numerous caves and ledges; a low, tan arch known as
    Hanging Rock; and the precipitous, pale-red conglomerate cliffs of
    Steamboat Rocks, said to resemble the bows of ships, perhaps lined
    up at anchor, shown here in a second photograph, also taken on Oct. 4,
    2020.

    Photo Details: Top - Camera: NIKON D3200; Exposure Time: 0.0031s
    (1/320); Aperture: ƒ/9.0; ISO equivalent: 100; Focal Length (35mm):
    120. Bottom - same except: Exposure Time: 0.0020s (1/500); Aperture:
    ƒ/11.0; ISO equivalent: 400; Focal Length (35mm): 67.
    * The Witches, Utah Coordinates: 40.99606, -111.46099

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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 9 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 Mon Mar 22 11:00:48 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.


    Double Rainbow on Evia, Greece

    March 22, 2021

    Double Rainbow 2021-01-04

    Photographer: Dimitris Malliaris
    Summary Authors: Dimitris Malliaris; Jim Foster
    This amazing double rainbow formed over Evia Island, Greece,
    following a strong storm, just before sunset on January 4, 2021.
    The image is a composition of 9 photos -– the camera is facing east,
    opposite of where the Sun was setting. In order for a double bow to
    be seen, the drops must be large enough (several mm in diameter) to
    accommodate more than a single reflection. Rays that emerge after the
    second reflection make up the outer, fainter bow. Note that the
    prominent darkened strip of sky between the primary and
    secondary bows is called Alexander’s Dark Band. Raindrops along
    the sight lines between the two bows are unable to scatter light toward
    your eyes, and thus this area is much darker than areas that lie on the
    outside of the bows.

    Photo Details: Canon EOS 6D camera; Canon 24-105mm f/4 L IS USM lens;
    24mm focal length; ƒ/5 aperture; 1/80 sec. exposure time; ISO:100;
    Adobe Photoshop CC (Windows).
    * Pissonas, Greece Coordinates: 38.52706, 23.7185

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    Atmospheric Effects Links

    * Atmospheric Optics
    * 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 13 weeks, 5 days, 20 hours, 27 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Thu Apr 22 11:00:38 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.


    Ice Falls in Valganna, Italy

    April 22, 2021

    Immagine

    Photographer: Michela Meda
    Summary Author: Michela Meda
    The photo above shows the freezing of a small waterfall as observed
    near Valganna (Varese), Italy, on February 15, 2021. Bitter cold
    settled in during mid-February throughout most of Europe, ushered in by
    northeast winds from western Siberia. As a result, nearly all water
    surfaces froze solid. Note the complex basal structures under the
    ice stalactites. These formations resulted from the splashing of
    water drops. The ice sculptures derived from this process are often
    quite complex as well as beautiful.
    * Valganna, Italy Coordinates: 45.855273, 8.823163

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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 1 week, 1 day, 22 hours, 42 minutes
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  • From Black Panther@21:1/186 to All on Tue Jun 22 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.


    Pink Moon over Annapolis Harbor

    June 22, 2021

    Cheryl_20200426074258_IMG_0466 (002)

    Cheryl_20200426075241_IMG_0489 (002)

    Photographer: Cheryl Compton

    Summary Authors: Cheryl Compton; Jim Foster

    Shown above is the full pink Moon rising above Annapolis Harbor
    ( Spa Creek), Maryland, on April 26, 2020. The name “pink moon”
    refers not to our satellite’s particular color during the month of
    April but to the fact that in the middle latitudes of the Northern
    Hemisphere, April is considered the month when most trees and shrubs
    are in blossom. However, Cheryl timed her shot (top photo) perfectly to
    capture this pink colored Moon rising in the gloaming.

    The bottom photo was taken approximately 10-minutes later than the top
    photo. As you can see, the pink coloration has been replaced with
    yellow-orange. The Sun and Moon (and all celestial objects) appear more
    reddened when they’re low in the sky because the path-length of
    light is longer at the horizon than it is for objects higher in the
    sky, even objects slightly above the horizon. Essentially, moonlight
    must pass through more of the Earth’s atmosphere at the horizon, so the
    shorter wavelength blue and green colors are extinguished, leaving
    the longer wavelength oranges and reds (and pinks).

    Note that on the top photo the Moon is reclining on a slightly darkened
    zone; this is the edge of night – the rising Earth’s shadow. The
    pinkish fringe where the Moon lies is referred to as the Belt of
    Venus. Unlike the full Moon, the Belt of Venus can be viewed at dawn or
    dusk, if the sky is clear, on any day of a given month.

    Photo details: Canon PowerShot SX740 camera.
    * Spa Creek, Annapolis, Maryland Coordinates: 38.9598, -76.5037

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    Atmospheric Effects Links

    * Atmospheric Optics
    * 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 6 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 Thu Jul 22 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.


    Otherworldly Sunset and Rock Spire

    July 22, 2021

    Spire

    Photographer: Marcin Zajac

    Summary Author: Marcin Zajac & Cadan Cummings

    Utah has some of the most otherworldly landscapes and this spire
    rising from the desolate badlands looks like something straight out
    of Star Wars. A product of extensive weathering, spires are highly
    eroded rock towers that are composed of a harder rock above layers of
    softer, less resistant strata.

    The land around Hanksville, Utah is especially otherworldly because it
    features countless geologic features ranging from spires and rock
    buttes to the nearby San Rafael Swell. By no coincidence, the
    Mars Society selected a nearby location to build their Mars
    Desert Research Station (MDRS) where interplanetary travel can be
    simulated with a crew of 6 to 8 people for several months at a time.
    Note the MDRS is a closed scientific facility and is not open to the
    public, so please respect their work and do not wonder onto their
    campus.
    * Hanksville, Utah Coordinates: 38.3730, -110.7140

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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, 6 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 Sep 22 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.


    The Moon’s Journey - Apogee to Perigee

    September 22, 2021

    Journey of the Moon

    Photographer: Soumyadeep Mukherjee

    Summary Author: Soumyadeep Mukherjee

    The image above shows a compilation of all the full moons during its
    most recent journey from apogee when it was furthest from Earth
    (October 31, 2020) to its latest perigee or closest approach to
    Earth (May 26, 2021). All eight full moons that appeared in this time
    varied in size, with its angular diameter in the sky growing with
    every full moon. For comparison, the supermoon at perigee on May
    26, 2021 was almost 15% larger than the micromoon at apogee on
    October 31, 2020.

    Each moon image is a stack of 225 images (best 75% of 300 images) taken
    from the same location, with the same equipment, and at the same focal
    length (600mm). The details of each moon- including the date of
    capture, name of full moon, distance from earth and angular diameter-
    are mentioned in the compilation image.

    Photo Details: Nikon D5600, Sigma 150-600c, Post-processing: PIPP,
    Autostakkert, Adobe Camera Raw, Photoshop
    * Kolkata, India Coordinates: 22.5726, 88.3639

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    Night Sky Links

    * Space Weather Live
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    * American Meteor Society
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    * 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 2 weeks, 5 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 Fri Oct 22 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.


    Dusty Sunset Over Sicily

    October 22, 2021

    DSC_0896mep

    Photographer: Teresa Molinaro

    Summary Author: Teresa Molinaro

    The photo above features a dramatic sunset on June 18, 2021 after a
    very hot summer day. Although I was at 3,117 ft (950 m) above sea
    level, immersed in the splendid Madonie Park, even here the heat
    was heavy and annoying. I was hoping to find refreshment in the green
    of nature and luckily around sunset the temperature began to be more
    bearable. I waited for the sunset because I anticipated the suspended
    Saharan dust would enhance the colors of the Sun, giving the
    sunset an African flavor. At around 8:30pm local time the Sun was
    preparing to go down behind the horizon, and it seemed that it was
    plunging into the houses of Polizzi Generosa in the heart of the
    Madonie. The spectacular colors of the sunset are due to the Saharan
    dust disproportionately scattering shorter wavelengths of light,
    thereby giving the sunset a reddish orange hue.

    Photo Data: Nikon D3400 1/250s, F/8, iso 200, lens 450MM
    * Polizzi Generosa, Sicily, Italy Coordinates: 37.813,14.004

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    Sun Links

    * NASA Solar Dynamics Observatory
    * NASA Solar Eclipse Page
    * NOAA Solar Calculator
    * The Sun-Earth Connection: Heliophysics
    * The Sunspot Cycle
    * Solar System Exploration: The Sun
    * The Sun Now
    * This Week’s Sky

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

    https://epod.usra.edu

    --- up 7 weeks, 21 hours, 55 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Mon Nov 22 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.


    Navajo Mountain and Lake Powell

    November 22, 2021

    EPOD.M.CanoeLakePowellNavajoMountainOct07

    Photographer: Thomas McGuire

    Summary Author: Thomas McGuire

    Navajo Mountain, on the Utah-Arizona border, rises to an elevation
    of 10,348 ft (3,154 m) and is the highest point on the Navajo
    Nation. A laccolith mountain, it has a distinctive rounded shape
    that can be seen from as much as 100 miles away (160 km); reminding you
    that you are on or near Navajo lands. The Navajo Nation reservation
    is a semi-autonomous territory larger than the state of West Virginia.
    Although subject to the laws of the United States, the Navajo Nation
    has its own internal regulations and law enforcement agencies.


    This image was taken in 2007 on my 50-mile (80 km) canoe trip on
    Lake Powell to Rainbow Bridge. There is no road access.
    Transport by small boat is not a recommended way to get there due to
    the wake of motor boats, notoriously strong winds, and sudden
    storms that sweep up the 100 mile length (160 km) of Lake Powell. But
    large tour boats visit Rainbow Bridge daily.


    Due to the limited 2019-2020 snow pack in the Rocky Mountains and the
    continuing drought in the Southwest, Lake Powell and Lake Mead
    each dropped this past summer to below 30-35% of capacity; a
    historic low. This low lake level is nationally significant because the
    largest cities of the American Southwest depend on these Colorado River
    reservoirs for water.
    * Kane County, Utah Coordinates: 37.310, -110.937

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    Geography Links

    * Atlapedia Online
    * CountryReports
    * GPS Visualizer
    * Holt Rinehart Winston World Atlas
    * Mapping Our World
    * Perry-Castañeda Library Map Collection
    * Types of Land
    * World Mapper

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

    https://epod.usra.edu

    --- up 1 week, 3 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 Wed Dec 22 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.


    Scarlet Waxcap Mushrooms

    December 22, 2021

    Scarletwaxcap

    Photographer: David Wigglesworth

    Summary Author: David Wigglesworth

    I was so pleased to find these examples of the Scarlet Waxcap
    Mushroom (Hygrocybe coccinea). My wife and I were on a walk in our
    favorite forest, and just off the main trail under some hardwood
    trees was this small display composed of several different stages of
    this bright little mushroom. The mushroom at the bottom of the photo is
    displaying the bell-shaped, uniformly red/scarlet cap or pileus.
    Conversely, the mushroom at middle-right is starting to flatten out and
    is losing some of its scarlet colour at the margins of the cap. Lastly,
    the mushroom at the top is in its mature form, displaying a broad,
    flat, glabrous cap. Estimated diameter of the top mushroom cap was
    approximately 1.75 to 2.2 in (4.5 to 5.5 cm).
    The scarlet waxcap is widely distributed throughout North America
    (and indeed, the northern hemisphere, including Japan, China, and
    Europe), but I’m not sure I’ve ever seen them before. I couldn’t miss
    these ones, though. The smallest was so bright red, it clearly stood
    out against the mossy ground.

    Photo details: Google Pixel 5, ƒ/1.73, 1/300, 4.38 mm, ISO50
    * Nobleton, Ontario, Canada Location Coordinates: 43.9122, -79.6981

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    More...

    Geography Links

    * Atlapedia Online
    * CountryReports
    * GPS Visualizer
    * Holt Rinehart Winston World Atlas
    * Mapping Our World
    * Perry-Castañeda Library Map Collection
    * Types of Land
    * World Mapper

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

    https://epod.usra.edu

    --- up 2 weeks, 3 days, 20 hours, 43 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)