• ES Picture of the Day 24 2022

    From Black Panther@21:1/186 to All on Mon Jan 24 11:01:04 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.


    A Plant’s Strength Lies in its Roots

    January 24, 2022


    Menashe_dayflower roots

    Menashe_dayflower roots2

    Photographer: Menashe Davidson

    Summary Author: Menashe Davidson

    When I decided to “domesticate” the white-mouth dayflower
    ( Commelina erecta) from the wild and grow it in containers in my
    home garden (Rishon LeZion, Israel), it was simply because I was
    impressed with the plants above ground vitality and the beauty of its
    blooms.

    A few months back, I replaced the white-mouth dayflower plants with
    other annual ornamentals that fit better with the winter season.
    Immediately, I realized the strength of the dayflowers’ roots. It was
    so securely anchored that I had difficulty extracting it from the soil
    it was growing from (top photo). Experiencing this, I could easily
    understand why this plant is able to thrive in places where other
    plants struggle. Note that in some regions the white mouth dayflower is
    considered invasive.

    The dayflower’s rhizomes, plant stems that are modified to grow
    horizontally beneath the surface, allow it to grow roots and shoots to
    form new plants. As you can see, the underground portion of this plant
    is a tangle of root systems -- several plants have grown together
    (bottom photo). Since entire new plants can grow from rhizomes
    fragments in the soil, once this species become established it’s very
    hard to eradicate.
    * Rishon LeZion, Israel Coordinates: 31.9730, 34.7925

    Related EPODs

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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, 1 day, 20 hours, 43 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Thu Mar 24 12:00:54 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.


    Moondogs and Paraselenic Arc

    March 24, 2022


    MatthewC_moon-photo (003)

    Photographer: Matthew Chin
    Summary Author: Matthew Chin; Jim Foster
    The photo above show the evening sky and the Moon as viewed from Yuen
    Long, Hong Kong on December 17, 2021. Faintly colored arcs in the
    vicinity of the Moon are annotated. Though it’s not unusual to be able
    to see a 22-degree lunar halo, observing moondogs (on both
    sides of the Moon) and the paraselenic circle is much more
    challenging. The Moon must be bright, near the full phase, in order
    to detect these dim arcs. Note that the paraselenic arc passes
    through the center of the lunar disk and circles around the sky ---
    best seen with a fisheye lens. The bright streak at upper is a jet
    contrail.
    * Yuen Long, Hong Kong Coordinates: 22.4445, 114.0222

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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 3 weeks, 3 days, 21 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Sun Apr 24 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.


    Archive - Great Sand Dunes National Park

    April 23, 2022

    6a0105371bb32c970b015393cbfb9b970b

    Every weekend we present a notable item from our archives.

    This EPOD was originally published on December 9, 2011.

    Photographer: Ingrid Wood
    Summary Author: Ingrid Wood; Jim Foster
    The photo above shows the massive tan-colored dunes in Great
    Sand Dunes National Park and Preserve, Colorado. Hikers in the
    foreground give scale to the immense size of these windblown sand
    dunes, which reach up to about 750 ft (230 m) above the surrounding
    landscape -- perhaps the tallest in North America. These dunes cover
    some 39 sq mi (100 sq km) and over thousands of years have settled up
    against the windward flank of the Sangre de Cristo Mountains,
    pushed by prevailing southwest winds across the San Luis
    Valley. The source of the sand was a widespread sand sheet, sand
    left behind when ancient lakes dried up, in the central portion of the
    San Luis Valley. Photo taken on August 22, 2007.

    Photo Details: Camera: Canon PowerShot A530; Focal Length: 9.8mm;
    Aperture: f/7.1; Exposure Time: 0.0031 s (1/320).
    * Great Sand Dunes, Colorado Coordinates: 37.73287, -105.51212

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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 7 weeks, 6 days, 21 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Tue May 24 12:00:30 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.


    Rainshaft Spotted in New York

    May 24, 2022

    Rainshaft2

    Photographer: Jack Widner

    Summary Author: Jack Widner

    Shown in the photo above is a rain shaft spotted in August 2016
    while driving southwest of Buffalo, New York. This specific cloud
    burst was one of several that occurred day, including one east on I-90
    near the New York-Pennsylvania border. Rain shafts are a type of
    convection storm that have strong centralized updrafts and
    downdrafts and produce very localized precipitation.
    * Angola, New York Coordinates: 42.638, -79.027

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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 12 weeks, 1 day, 20 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Fri Jun 24 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.


    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
    * 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 16 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 Sun Jul 24 12:01:00 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.


    Nature Reclaims Lost Shoe

    July 22, 2022

    Epod-tris

    Photographer: Rosario Catania

    Summary Author: Rosario Catania

    The picture above shows a lost shoe in the woods near the Etna
    volcano. As is happening above, nature always reclaims the spaces that
    belong to her. It’s just a matter of time before plants and organisms
    begin to grow and utilize the discarded items on the forest floor.
    Commonly found on fallen trees and rocks, moss is considered both a
    producer and decomposer since it typically helps breaking down
    items into available nutrients. This work has a larger significance
    within the lifecycle of ecosystems because it makes nutrients available
    for surrounding organisms.

    Now in perfect camouflage, time for the shoe pictured above will pass,
    but it will devour its contents. A time that for our existence means a
    lot, but in the cycle of nature is only a flash.
    * Bronte, Sicily, Italy Coordinates: 37.7883, 14.8307

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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 20 weeks, 6 days, 21 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Wed Aug 24 12:01:00 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.


    Eastern Flank of Mt. Etna

    August 24, 2022

    Epod-etna-bove-02062022

    Photographer: Rosario Catania
    Summary Author: Rosario Catania
    The photo above shows Mt. Etna as seen in its eastern guise, above
    its ancient eruptive centers. The majestic Valle del Bove
    (foreground) is a wide basin more than 3,280 ft (1,000 m) deep, 3 miles
    (5 km) wide and 4 miles (7 km) long. This depression, dating back
    between 7 and 10 thousand years, was caused by the collapse of these
    eruptive centers.

    On the left of the photo, visible in the distance, is the city of
    Catania, with the Ionian Sea extending southward, and on the
    right is the coast of Calabria (mainland of Italy).

    During eruptions over the past 30 years, millions of cubic meters
    of lava have poured from this stratovolcano into the Valle del Bove
    Bove, which was once rich in vegetation and cultivated fields. Etna, a
    natural laboratory par excellence, has been a World Heritage Site
    since 2013. Photo taken on June 2, 2022.

    Zafferana, Etnea Sicily, Italy Coordinates: 37.6897, 15.1053


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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 25 weeks, 2 days, 21 minutes
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  • From Black Panther@21:1/186 to All on Sat Sep 24 12:01:12 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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    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 29 weeks, 5 days, 21 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)