• ES Picture of the Day 25 2022

    From Dan Richter@1:317/3 to All on Friday, March 25, 2022 12:00:56
    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

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  • From Dan Richter@1:317/3 to All on Monday, April 25, 2022 12:01:08
    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

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  • From Dan Richter@1:317/3 to All on Wednesday, May 25, 2022 12:00:40
    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
    * 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

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  • From Dan Richter@1:317/3 to All on Saturday, June 25, 2022 12:01:06
    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

    * NASA Solar Dynamics Observatory
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    * 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

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  • From Dan Richter@1:317/3 to All on Monday, July 25, 2022 12:01:46
    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

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  • From Dan Richter@1:317/3 to All on Thursday, August 25, 2022 12:01:04
    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 Dan Richter@1:317/3 to All on Sunday, September 25, 2022 12:01:08
    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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    -
    Earth Science Picture of the Day is a service of the Universities
    Space Research Association.

    https://epod.usra.edu

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  • From Dan Richter@1:317/3 to All on Tuesday, October 25, 2022 12:00:36
    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.


    Lamiaceae Family of Aromatic Flowering Plants

    October 25, 2022

    Menashe_sage2

    Photographer: Menashe Davidson

    Summary Author: Menashe Davidson

    The Lamiaceae are a family of flowering plants commonly known as
    mint or deadnettle. Plants in this family are characterized
    by square stems, paired and simple leaves, and two-lipped
    open-mouthed tubular flowers. Many of these plants are aromatic in all
    parts and include widely used culinary herbs like basil, mint,
    rosemary, sage, lavender, and salvia. They’re cultivated not only for
    their aromatic qualities, but also for their ease of cultivation and
    for their decorative foliage (coleus, for instance).

    The photos above demonstrate the botanical richness of plants in
    the Lamiaceae family. They were all grown in containers in my home
    garden in Rishon Le Zion Israel, on September 4, 2022.

    Picture 1 - Plectranthus Mona Lavender -- ornamental

    Picture 2 - Coleus amboinicus -- ornamental

    Picture 3 - rosemary (Salvia rosmarinus) -- herb

    Picture 4 - basil (Ocimum basilicum) -- herb


    Rishon Le Zion, Israel Coordinates 31.9730, 34.7925


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    Plant Links

    * Discover Life
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    * USDA Plants Database
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    * 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

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  • From Dan Richter@1:317/3 to All on Friday, November 25, 2022 11:01:08
    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.


    Glacial Striations in Victoria, British Columbia

    November 25, 2022


    L1005811

    Photographer: Joe LaCour

    Summary Author: Joe LaCour

    Just a few hundred meters southeast and across the street from where
    the Coho ferry docks in downtown Victoria, British Columbia,
    you can see a great example of the power of the glaciers from a
    previous ice age. Some 15,000 years ago, a glacier flowed over what
    is now Victoria. The surface of the outcrop shown above was
    grooved, scratched, and polished by the cutting action of pebbles
    and boulders dragged along like a piece of giant sandpaper frozen to
    the bottom a glacier. This fascinating ice age relic might be easy to
    miss as the attention of many passers-by is captured by the striking
    Legislative Parliament Building (not in photo). Note that the
    bronze plaque in the foreground - Glacial Grooves and Striations
    - acknowledges Victoria's glacial history.

    Photo details: Leica M9 Digital camera; 35mm Summicron lens; f13; 1/60
    second exposure; ISO320; processed with DxO PhotoLab.


    Victoria, British Columbia, Canada Coordinates: 48.4284, -123.3656


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    Geography Links

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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 Dan Richter@1:317/3 to All on Sunday, December 25, 2022 11:00:44
    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.


    Fernlike Snow Crystal

    December 25, 2022

    Wilson_snow_crystal_1e018f4a57d4c9c72ca62b8e6a3b374a

    Photographer: Wilson Bentley

    Summary Author: Jim Foster

    The lacy crystal shown above, as well as hundreds of other snow
    crystals, were first photographed by Wilson Alwyn Bentley (1865-1931).
    These photomicrographs are housed at the Bentley Snow Crystal
    Collection in the Schwerdtfeger Library, at the University of
    Wisconsin. According to the Lee/Magano system, this lovely specimen
    is classified as a fernlike dendrite snow crystal ( P2e). Snow
    crystals are six-sided because the water molecules that form them are
    characteristically arranged in layers of hexagonal rings. This
    results in their stunning six-fold symmetry.



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    Cryosphere Links

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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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