• ES Picture of the Day 25 2022

    From Black Panther@21:1/186 to All on Tue Jan 25 11:01:06 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.


    Anvil Clouds and Crepuscular Rays

    January 25, 2022


    Crepuscular Rays_2040pix

    Photographer: Gianni Tumino

    Summary Authors: Gianni Tumino; Jim Foster

    The photo above showing eye-catching, flat-topped clouds and
    crepuscular rays was taken from Ragusa, Sicily (Italy), just after
    sunset on November 15, 2021. These distant anvil clouds
    (Cumulonimbus incus) effectively block the Sun’s rays, but gaps between
    them allow sunlight to filter through. The resulting lanes of light and
    dark are made visible by dust or other aerosols in the atmosphere
    that act to project the rays across the sky.

    Photo details: CANON EOS 6D Mark II camera; SIGMA ART 24-105 MM lens;
    38 mm; f/8; 1/180 second exposure; 100 ISO.
    * Ragusa (Sicily), Italy Coordinates: 36.891735, 14.673495

    Related EPODs

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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 7 weeks, 2 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 Fri Mar 25 12:00:56 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.


    Airglow Over Dark Sky Park Poloniny

    March 25, 2022

    Airglow_BlastSMALLer

    Photographer: Tomas Slovinsky

    Summary Authors: Tomas Slovinsky; Cadan Cummings

    During my trip to the darkest place in Slovakia, Dark Sky Park
    Poloniny, I witnessed the most vibrant airglow I have ever
    observed. Airglow occurs when either ultraviolet light from the Sun
    excites electrons of upper atmosphere gases or the molecules are
    ionized and later recombine to produce a free electron. This phenomenon
    is the reason why the night sky is continuously blanked in a faint
    light. Although present throughout the year and around the world,
    airglow is best visible in dark locations where light pollution is
    minimal.

    At the beginning of the night, the sky was completely dark.
    However, right before the end of the astronomical night, the brightness
    of the sky dramatically increased to the point that it even lit the
    foreground. I had one guess about what was happening, but I wanted to
    be sure and took this picture. When I pointed the camera towards the
    sky, I was truly excited about the nice colors and structures.
    Coincidentally, there is an airglow-monitoring program at the
    Kolonica Observatory called AMON-ES (Airglow MONitoring -
    Extended Station). It's clear that under the dark night sky, the real
    gems are revealed.
    * Dark Sky Park Poloniny, Slovakia Coordinates: 49.054, 22.409

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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 3 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 Apr 25 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.


    Flood Hazard in the Desert

    April 25, 2022


    TomMc_.EPOD.CampCreekFloodAugust18.2021 (003)

    2022.EPOD.RadarCampCreekFloodAug18.2021

    Photographer: Thomas McGuire (Author and Town Council Member)

    Summary Author: Thomas McGuire (Author and Town Council Member)

    On August 18, 2021, a massive flood swept through the remote
    settlement of Camp Creek, north of Phoenix, Arizona. Damage to this
    creek-side community was greater than any flood recorded in the past 50
    years, or more. Even houses 20 feet (6 m) above the normal stream level
    were destroyed. But far worse, two tourists in a rental
    all-terrain vehicle (ATV) died because they were unaware of the
    danger of these rapid flood events. Regrettably, the death of
    people who try to drive through flooded stream crossings is an all-too
    common event in the Phoenix area.

    Camp Creek is a minor stream north of Phoenix that’s less than 15 miles
    (24 km) long. But a combination of moist monsoon winds from the
    Gulf of California, sparse vegetation within the watershed, ash
    from recent brushfires acting as cloud-producing condensation nuclei
    and adiabatic cooling caused by air rising into the highlands, led
    to a sudden flood event. Although no official measurements exist, the
    author estimates the brief, but maximum discharge of this small stream
    was on the order of 10,000 cubic feet per second; comparable to water
    flowing in the Colorado River through the Grand Canyon.

    The top image shows the damage to the riparian environment after
    streamflow returned to its normal discharge level. The bottom photo is
    a radar image showing a monsoon wind carrying a narrow band of intense
    rainfall through the Camp Creek watershed. Note that Cave Creek wash,
    only 5 miles (8 km) to the west, had relatively modest flooding.
    * Camp Creek, Arizona Coordinates: 33.878, -111.803

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    Hydrology Links

    * Current Sea Surface Temperature
    * NOAA Ocean Explorer Gallery
    * Ocean Color
    * What is hydrology?
    * Tides and Currents
    * Water Resources of the United States
    * World Waterfall Database
    * The USGS Water Science School
    * World Water Database
    * The World’s Water
    * USGS Surface Water Information Pages

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

    https://epod.usra.edu

    --- up 8 weeks, 21 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Wed May 25 12:00:40 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.


    Sun Granules

    May 25, 2022

    Solar granules 18082017 1249

    Photographer: Matteo Vacca

    Summary Authors: Matteo Vacca; Cadan Cummings

    The photograph above shows granules on the photosphere of the
    Sun. These irregularly shaped features are produced by plasma
    convection currents below the Sun’s surface. Convection occurs when
    fusion reactions heat opaque gases, which causes them to rise
    to the surface and subsequently emit energy. Several million
    granules cover the Sun’s surface at any time; however, they usually
    last between 8 to 20 minutes before dissipating. To give a sense of
    scale to the photo, an average solar granule has a diameter of about
    930 miles or 1500 kilometers. Always protect your eyes when
    observing the Sun.
    * Milis, Sardinia, Italy Coordinates: 40.0487, 8.6370

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    Sun Links

    * NASA Solar Dynamics Observatory
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    * 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 12 weeks, 2 days, 20 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Sat Jun 25 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.


    Sun Plunging into the Mist and Sea

    June 24, 2022

    Sole e foschia

    Photographer: Emanuele Nifosì

    Summary Authors: Emanuele Nifosì; Cadan Cummings

    Shown above is the setting Sun captured as it passed through a
    thick layer of clouds and mist on the horizon. The vibrant hues of
    sunset and sunrise are a product of atmospheric scattering. When
    the Sun is low to the horizon, the incoming sunlight must pass through
    a greater amount of our atmosphere. During these times of the day,
    shorter wavelengths of light (violet, blue, green) are more
    strongly scattered out of sight compared to the longer wavelength hues
    (orange and red). Looking closely at the solar disk, it is also
    possible to appreciate, without a filter, the sunspot AR 2976 at 12
    o'clock. Always protect your eyes and optics when viewing the Sun.
    Photo taken on March 24, 2020, at around 6:19 pm local time.

    Photo details: Nikon D700, Skywatcher ED 50, Hyperion 17mm, ISO 1600,
    exp 1/400 sec.
    * Scicli, Ragusa, Sicily, Italy Coordinates: 36.7932, 14.7070

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    Sun Links

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

    https://epod.usra.edu

    --- up 16 weeks, 5 days, 21 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Mon Jul 25 12:01:46 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.


    Water Eruption

    July 25, 2022

    Eruzione d'acqua 2

    Photographer: Emanuele Nifosì

    Summary Author: Emanuele Nifosì

    Near the village of Sampieri, Italy, there is an approximately
    three foot or one-meter diameter natural well along the cliff that
    connects to the sea through a canal. This opening is the result of
    natural erosion that happened over the past centuries and consists
    of two main segments- the first part is on the surface while the other
    section is underground. Depending on the meteorological and marine
    conditions, which on the day of these photos included wind from the
    south-east with gusts of 25-30 miles per hour (40-50 kilometers per
    hour) and rough sea, the water column reaches this opening and explodes
    upwards to over six and a half feet or two meters in height. Photo
    taken on April 2, 2022.
    * Sampieri, Ragusa, Sicily, Italy Coordinates: 36.7219, 14.7370

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    Hydrology Links

    * Current Sea Surface Temperature
    * NOAA Ocean Explorer Gallery
    * Ocean Color
    * What is hydrology?
    * Tides and Currents
    * Water Resources of the United States
    * World Waterfall Database
    * The USGS Water Science School
    * World Water Database
    * The World’s Water
    * USGS Surface Water Information Pages

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

    https://epod.usra.edu

    --- up 21 weeks, 22 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Thu Aug 25 12:01:04 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.


    Rain Shaft Observed over St. Petersburg, Florida

    August 25, 2022

    IMG_20220530_231450_494

    Photographer: Stromy

    Summary Author: Stromy; Jim Foster

    The photo above shows a classic precipitation shaft from a
    strong storm cell as observed from near the Gandy Bridge in St.
    Petersburg, Florida. While it seems that a leak developed in the cloud
    allowing water to pour out, in actuality, rain is being pushed
    groundward by a downdraft generated by the storm. Well-defined
    shafts such as this may be an indication of a microburst. No
    significant damage was reported from this storm. Photo taken with a
    p30pro cellphone on May 30, 2022.


    St. Petersburg, Florida Coordinates: 27.7676, -82.6403


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

    https://epod.usra.edu

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  • From Black Panther@21:1/186 to All on Sun Sep 25 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.


    Celestial Parade of the Planets in June 2022

    September 23, 2022

    0623PlanetsandMoon-3 (1)

    DSC_1140s2 (1)

    Allineamento Planetario Tranego 7-4

    Photographers: Matthew Chin; Meiying Lee; Alessandra Masi

    Summary Authors: Meiying Lee; Matthew Chin; Alessandra Masi

    Featured above are views of the visible planets in our solar
    system, and the crescent moon, as seen from Taipei (top), Yuen
    Long, Hong Kong (middle) and the Dolomite Range of Italy (bottom,
    note that Neptune and Uranus are also visible here). Such an
    unusual alignment can be observed only about once every 20-years.
    Top and middle photos were taken on June 23, 2022, and the bottom photo
    was taken on June 25, 2022. All photos were captured looking east, just
    before dawn.


    Yuen Long, Hong Kong Coordinates: 22.4445, 114.0222

    Taipei, Taiwan Coordinates: 25.0330, 121.5654

    Dolomites Mountains, Italy Coordinates: 46.433334, 11.850000


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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 29 weeks, 6 days, 21 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)