• ES Picture of the Day 21 2021

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


    Mount Forato’s Natural Arch at Sunset

    January 21, 2021

    Mount Forato’s Natural Arch at Sunset

    Photographer: Fabio Di Stefano
    Summary Authors Fabio Di Stefano; Stu Witmer

    Seen above, the Sun sets directly behind the natural arch of
    Mount Forato in the Alpi Apuani UNESCO Global Geopark of Tuscany
    (Italy). The arch is one of the largest in Italy and is known locally
    as the Pania forata (perforated hill). It was probably formed by the
    wind and water erosion of the carbonate rock. The Apuan
    Alps originated in the Paleozoic Era (about 500 million years ago)
    and are known for their combination of marble mountains and
    karst caves. Sometimes it's possible to see planets or the
    Moon through the arch. Photo taken November 10, 2020.

    Photo Details: Camera: Canon EOS M6; Software: Adobe Photoshop
    Lightroom Classic 9.4 (Windows); Exposure Time: 0.0031s (1/320);
    Aperture: ƒ/7.1; ISO equivalent: 800; Focal Length: 200.0mm; Lens:
    EF70-200mm f/4L USM
    * Mount Forato, Italy Coordinates: 44.01506, 10.3354

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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

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  • From Black Panther@21:1/186 to All on Wed Apr 21 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.


    Spring Flowers on Mt. Kulis

    April 21, 2021

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    Photographer: Paul Anton D. Mahinay
    Summary Author: Paul Anton D. Mahinay

    This sunrise photo was captured atop Mt. Kulis (2,034 ft or 620
    m above sea level) in Tanay, Rizal, Philippines, on February 25, 2021.
    The northeast monsoon (prevailing wind during winter) had begun to
    weaken, allowing warmer and sunnier weather to set in. As a result, the
    yellow-orange cosmos flowers in the foreground were in bloom, their
    coloration nearly matching the color of this sunrise.
    Photo Details: Smart phone camera; f/1.7; 3.93 mm; ISO 40; taken at
    6:57 a.m.
    * Mt. Kulis, Philippines Coordinates: 14.6083, 121.3669

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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

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  • From Black Panther@21:1/186 to All on Fri May 21 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.


    The Relativistic Jet of M87

    May 21, 2021


    HSIII_M87_12subs_4mins_dither_2star_SDMask_DDP_Crop_Flat202020_MSS_
    NoiseRed_LCE_Composite_Arrowed

    Photographer: Greg Parker
    Summary Author: Greg Parker
    As it’s galaxy viewing season now (for stargazers with telescopes), I
    thought I'd look for the relativistic jet coming out of galaxy
    M87 in the Virgo Galaxy Cluster. M87, some 54 million light
    years away, is the galaxy where a radio image of the supermassive
    black hole that lies at its center was recently acquired. The
    relativistic jet of high energy particles is the signature of this
    black hole.

    After imaging, when I did my normal processing procedure, the jet was
    lost in the glare of M87 itself. So, I used a Digital Development
    Filter to mask out the galaxy, and this allowed the jet to be seen
    quite clearly. Photo taken on April 18, 2021.
    Photo details; The image consists of 12 sub-exposures each of 4-minutes
    taken on a Hyperstar III (f#2; Celestron C11 SCR telescope; Starlight
    Xpress 814C one shot color CCD camera. The main frame is the whole
    field of view of the Hyperstar III with M87 at the center of the frame.
    The insert is a further processed view of just M87 in order to make the
    jet clearer.

    New Forest Observatory, Brockenhurst, Hampshire, U.K. Coordinates:
    50.819700, -1.590349

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    Night Sky Links

    * Space Weather Live
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    * About the Moon
    * American Meteor Society
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    * 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 Black Panther@21:1/186 to All on Mon Jun 21 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.


    Mammatus Clouds over Colorado Springs, Colorado

    June 21, 2021

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    Photographer: Jessica Falk
    Summary Authors: Jessica Falk; Jim Foster
    These scary looking mammatus clouds accompanied severe storms
    that marched across the Rocky Mountains and into Colorado Springs,
    Colorado, on a summer’s day a few years back. Formed by downdrafts
    pushing cool air toward the base of the storm, mammatus are rarely as
    mean as they appear. Nonetheless, it’s comforting to have shelter close
    by when clouds like these take shape. Photo taken on July 10, 2013.
    * Woodland Park, Colorado Coordinates: 38.9939, -105.0569

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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

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  • From Black Panther@21:1/186 to All on Wed Jul 21 11:00:36 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.


    Strong Thunderstorm Over France

    July 21, 2021

    _DSF6351-1_TIFF_1_JPEG_reduced

    Photographer: Donato Lioce

    Summary Author: Donato Lioce & Cadan Cummings

    This photo of a thunderstorm in France was created by stacking five
    long exposure images taken over two minutes. While there was clear sky
    above me, I noticed lightning nearby on the horizon. A majority of
    this intense storm cell is intra-cloud and cloud-to-cloud
    lightning, although occasional cloud-to-ground lightning is seen
    striking the land surface. Intra-cloud lightning is the most frequent
    form and is also called sheet lightning because of how it lights up
    the sky. I find this image interesting because the intra-cloud
    lightning gives the image a sense of explosion.

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    Severe Weather Links

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    * 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

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


    Four Seasons of Wisteria

    September 21, 2021


    Image0 (2)

    Photographer: Marcella Botti

    Summary Author: Marcella Botti

    In September 2019, I noticed this beautiful wisteria in the
    Park of Villa Finzi, Milan, Italy, and so for fun I photographed it
    over and over again, noticing the change from one month to the next. I
    managed to take the first two photos shown above (autumn and winter),
    when I was working in Milan, then I changed jobs, then the pandemic
    arrived. Intent on completing the project, I went back to Milan in
    March 2021 to immortalize spring, and finally, in June 2021, I finally
    completed by little swing through the seasons.
    Wisteria, a genus in the legume family of flowering plants
    ( Fabaceae or Leguminosae), is a vigorous and cold hardy climbing
    vine. Different species are found throughout the mid latitudes of the
    Northern Hemisphere, including China, Korea, Japan, Southern Canada,
    and the eastern United States. The woody vines of the wisteria climb by
    twining their stems (notice the huge vine of this wisteria) around any
    available support. All four photos featured above were taken between
    9:00 a.m. and 9:30 a.m., local solar time, using my IPhone XR.


    * Villa Finzi, Milan, Italy Coordinates: 45.5053, 9.2200

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    Plant 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 Black Panther@21:1/186 to All on Thu Oct 21 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.


    The Law of the (Colorado) River

    October 21, 2021


    EPODa.LakeMeadeMay2019 (004)

    Photographer: Thomas McGuire
    Summary Author: Thomas McGuire

    In 1922 seven states met to establish the Colorado River Compact.
    Since then, there have been hundreds of changes, bitterly fought court
    cases, and even a military confrontation. This has resulted in gigantic
    mass of convoluted regulations collectively called “The Law of the
    River.“ With changing needs, drought and a warming climate, it still
    grows.

    As the 20-year mega-drought in the southwestern U.S. continues,
    Lake Mead (shown above), the nation’s largest reservoir, has
    dropped below the critical level of 1,075 ( m) feet above sea level. As
    of September 15, 2021, it’s at 1,068 ft (326 m) and still
    declining. Lake Meade’s storage is only about 35% of capacity. This
    shortage is unwelcome, but long anticipated. Uses of river water have
    been prioritized. The first major reductions will occur in
    agricultural irrigation; by far, the greatest water use. Municipal
    water has a much higher priority, as do the rights of certain Native
    American tribes.

    The goal is a sustainable balance between supplies and needs as our
    population grows and climate changes. Most experts think it can
    probably be done, but major innovations and perhaps even new water
    sources will be required. Photo taken in late summer 2019.


    * Boulder City, Nevada Coordinates: 36.020998, -114.770214

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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 Nov 21 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.


    Archive - Bountiful Autumn

    November 20, 2021

    6a0105371bb32c970b019b00a71e7c970d

    Every weekend we present a notable item from our archives.

    This EPOD was originally published November 28, 2013.

    Photographer: Jeanette Stafford
    Summary Author: Jeanette Stafford
    Folklore suggests that a bountiful crop of hawthorn berries
    ( haws) in the autumn predicts a severe winter ahead. However, this
    year’s glut of berries and soft fruits is the result of unusually
    cold weather in the first half of the year. Thus, spring arrived
    several weeks late. Temperatures in the UK during March 2013 were about
    6 F (3.3 C) below average, making it colder than the preceding three
    winter months and the coldest March in 50 years. The unusually cold air
    inhibited plant growth and delayed blossoming by around six weeks for
    some trees and plants, such as hawthorns ( Crataegus monogyna).
    Hawthorne Hawthorn or “ may” usually flowers during the month of
    May, at least here in Scotland (at left). This year the hawthorn didn’t
    bloom until June, the latest I’ve ever observed. Once the risk of
    frost damage passed, blossoms were quite abundant. Now that the
    leaves have dropped, hawthorn trees are laden with crimson berries, a
    plentiful harvest for birds and other wildlife.
    Unusually cold spells in the British Isles often occur when a
    climatic pattern called the North Atlantic Oscillation (NAO)
    experiences an extreme negative phase. March 2013 as well as the cold
    winters of 2009/2010 and 2010/2011 all had acutely negative NAOs. Time
    will tell if cold conditions prevail during the coming winter. Should
    this in fact happen, those who espouse folklore may well feel
    vindicated. Top photo taken on October 14, 2013.

    Photo details: Top - Camera Model: PENTAX K-5; Focal Length: 42.5mm
    (35mm equivalent: 64mm); Aperture: f/4.5; Exposure Time: 0.0080 s
    (1/125); ISO equiv: 100. Inset - same except: Aperture: f/8.0; Exposure
    Time: 0.0016 s (1/640); ISO equiv: 200.
    * Mugdock Country Park, Scotland Coordinates: 55.973306, -4.330566

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    * Discover Life
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    * USDA Plants Database
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    * 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 Black Panther@21:1/186 to All on Tue Dec 21 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.


    Slickrock: A Rock Surface, A Town, and A Geological Unit

    December 21, 2021

    Tom_EPOD.SlickrockGlenCanyonDamLakePowell (003)

    Tom_EPOD.SlickRockMember (002)


    Photographer: Thomas McGuire

    Summary Author: Thomas McGuire

    The word slickrock has several meanings; all of them can be associated
    with the American Southwest. Slickrock is a name applied to places
    where the early settlers found it difficult to travel because of the
    sandstone rock surfaces where horses and the metal-rimmed wheels
    couldn’t get safe traction. But hikers and vehicles with rubber tires
    find them anything but “slick. In fact, the slickrock area above Moab,
    Utah, is world renowned for its challenging and sinuous,
    roller-coaster mountain bike trails over the Navajo Formation
    slickrock surface.

    Slick Rock is also a community in southwestern Colorado. That
    community has given its name to the lowest member of the Entrada
    Sandstone formation.

    The photo above shows the photographer looking out over slickrock
    sandstone country, approximately 0.5 mile (0.8 km) west of the Glen
    Canyon Dam, near Page, Arizona. The stratigraphic positions of the
    photograph and of the Slick Rock Member of the Entrada Sandstone are
    shown on the stratigraphic diagram (below), which gives the relative
    ages of mapable geologic formations. These sandstone formations
    resulted from geologic history’s greatest erg (sea of sand), created
    during the Jurassic Period, some 200 million years ago.
    * Glen Canyon (0.5 miles west), Arizona Coordinates: 36.932167,
    -111.499872

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    * Earthquakes
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    * 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

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