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  • ES Picture of the Day 10 2022

    From Dan Richter@1:317/3 to All on Thu Feb 10 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.


    Dust Cloud Near Shadow Mountain, Nevada

    February 10, 2022

    20211124_161627

    Photographer: Becca Jones

    Summary Author: Becca Jones

    This sunset photo was taken near the town of Pahrump, Nevada on
    November 24, 2021. The photo shows a dust cloud that was produced
    by a windstorm against the background of the Shadow Mountain.
    Pahrump Valley is located in the Mojave Desert and is roughly
    60 miles (100 km) west of Las Vegas, Nevada. The region borders
    Death Valley, however, is not subjected to the same scorching
    summer temperatures because of its elevation.
    * Pahrump, Nevada Coordinates: 36.2083, -115.9839

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    Severe Weather Links

    * World Severe Weather Information Center
    * Enhanced Fujita Scale
    * A Lightning Primer
    * More About Thunderstorms
    * Staying Safe Outdoors in Severe Weather
    * NOAA Storm Prediction Center
    * Patterns of Lightning Activity
    * US National Weather Service

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

    https://epod.usra.edu

    --- up 9 weeks, 4 days, 20 hours, 43 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (1:317/3)
  • From Dan Richter@1:317/3 to All on Sun Jul 10 12:01:14 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.


    Trails of Stars Along the Celestial Equator

    July 08, 2022

    Giannitumino Star Trail_jpg_logo_3000pix

    Photographer: Gianni Tumino

    Summary Authors: Gianni Tumino; Jim Foster

    The photo above shows the trails of stars along the celestial
    equator as observed from Punta Cirica (Sicily) Italy, on March 2, 2022.
    Each curvilinear streak is the path of a star. Notice that the stars on
    either side of the celestial equator, which runs from top left to
    bottom right, have trails that begin to curve (due to the Earth's
    rotation) in the direction of their respective celestial poles, the
    north pole at right, and the south pole at left.

    Photo details: Canon EOS camera; 14 mm lens; f/1.8; f/3.2; N°160; 12
    second exposure; ISO 3200. Software: Sequator; Lightroom; Photoshop.
    * Punta Cirica (Sicily) Italy Coordinates: 36.692692, 14.969296

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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 18 weeks, 6 days, 21 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (1:317/3)
  • From Dan Richter@1:317/3 to All on Mon Oct 10 12:01:14 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.


    Loana Valley of Italy at Night

    October 10, 2022

    #01 (9)

    Photographer: Paolo Bardelli

    Summary Author: Paolo Bardelli
    These photos show two different views of night sky conditions observed
    from Val Loana (Loana Valley), in the Piedmontese Alps of northern
    Italy. Peaks at left delimit the boundary of the Val Grande
    National Park.

    The Loana valley is also almost uninhabited, thus this is a very dark
    area at night. Despite the presence of the quarter Moon (half
    illuminated) and artificial lighting in the direction of the Po
    Valley to the south, the Milky Way is clearly visible (top view).

    However, the bottom view (looking north) shows that light pollution
    here is still a concern even though existing laws are in place aimed to
    curb this stray light. Note the asterism of the Big Dipper, through
    a layer of cirrus clouds, at lower left. Photos taken on the night of
    July 10, 2022.

    Photo details: Canon 6D camera; Samyang lens 14 mm; 30 seconds
    exposure; f/2.8; 6400 ISO; Photoshop processing. Akira Fuji effect
    used to highlight constellations.

    Loana Valley, Italy Coordinates: 46.0890, 8.4772

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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 32 weeks, 21 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (1:317/3)
  • From Dan Richter@1:317/3 to All on Thu Nov 10 11:00:56 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.


    A Year of Sunspots

    November 10, 2022


    A Year in the Sun (1)

    Photographer: Soumyadeep Mukherjee
    Summary Author: Soumyadeep Mukherjee

    I imaged the Sun for 365 days between December 25, 2020, and
    December 31, 2021, missing just six days during this period. The
    project started with the aim of recording the journey of a single
    sunspot across the solar disk, but I managed to continue imaging
    for an entire year. From my home in Kolkata, India, I blended the
    images to create a single shot, which records the rise of Solar
    Cycle 25. A total of 127 active regions appeared on the Earth-facing
    solar disk (AR 12794–AR 12921) during this phase – the image above
    shows all of them.

    Two bands of sunspots can be identified moving across the solar
    disk, around 15–35 degrees north and south of the equator. Note that
    they gradually start drifting towards the solar equator – a phenomenon
    known as Spörer’s Law.
    Photo details: Nikon D5600 camera; Sigma 150–600c lens; Thousand Oaks
    Filter (White-Light); f/6.3; ISO 100; 365 individual exposures
    (1/80-second to 1/500-second), 600mm; Post-processing using PIPP and
    Photoshop.
    Kolkata, India Coordinates: 22.5726, 88.3639


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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 36 weeks, 3 days, 21 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (1:317/3)
  • From Dan Richter@1:317/3 to All on Sat Dec 10 11:01:16 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.


    Crystal Forms in Petrified Wood

    December 09, 2022

    TomMc_EPODImage2.WolverineLoopPetrifiedForest2022#2 (003)

    TomMc_EPODImage1.PetrifiedWoodWolverineClose2022#1 (003)

    Photographer: Thomas McGuire

    Summary Author: Thomas McGuire


    Grand Staircase National Monument is a spectacularly rich geologic
    area in remote southern Utah. Within this monument, Wolverine
    Petrified Forest, shown above at top, features silicified (petrified)
    tree trunks and sections. The variety of colors is caused by iron
    oxide and other oxide minerals.


    In the bottom photo, the geometric forms at right are dark stained
    quartz crystals that probably grew by groundwater deposition in
    openings called “ vugs.” Quartz is extremely common, but visible
    quartz crystals less so. When an igneous rock cools and
    crystallizes, quartz is the last common mineral to harden, so it
    usually fills in the irregular openings between previously formed
    minerals including feldspar, mica, amphibole and pyroxene. What
    surprised me was the texture on this exposed surface. The radial forms
    at the bottom of the photo are new to me, and I have yet to understand
    how they formed. Photos taken in July 2022.



    Grand Staircase National Monument, Utah Coordinates: 37.799633,
    -111.214906


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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
    * MyShake - University of California, Berkeley
    * 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 40 weeks, 5 days, 21 minutes
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