• ES Picture of the Day 19 2022

    From Black Panther@21:1/186 to All on Wed Jan 19 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.


    Waterfall in the Desert

    January 19, 2022

    EPOD.WatefallCampCreekFec017#6a copy

    Photographer: Thomas McGuire

    Summary Author: Thomas McGuire

    The Sonoran Desert near Phoenix, Arizona has many natural
    waterfalls, but nearly all of them only run for a few hours after
    major rain events. Shown in the picture above, Camp Creek waterfall,
    located about 10 miles (16 km) east of Cave Creek, is a rare
    exception. While this image shows winter flow, it is only in the past
    couple of years that the waterfall has run completely dry by the end of
    the summer. This alone does not prove global warming. But it adds to
    the countless observations of others as unfortunate and compelling
    evidence of local climate change.

    The geologic conditions that cause this anomaly in the desert are
    springs upstream where a perched water table on ancient
    basaltic lava layers comes to the surface. Except in usually heavy
    or monsoon floods, the water usually seeps into a deeper
    alluvial aquifer around 300 feet (91 m) or so downstream.
    * Cave Creek, Arizona Coordinates: 33.8759078, -111.8030053

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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 6 weeks, 3 days, 20 hours, 43 minutes
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  • From Black Panther@21:1/186 to All on Sat Mar 19 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.


    Archive - Upheaval Dome

    March 19, 2022

    Upheavaldome

    Every weekend we present a notable item from our archives.

    This EPOD was originally published on July 28, 2011.

    Photographer: Steven Schimmrich
    Summary Author: Steven Schimmrich

    The panorama above shows Upheaval Dome in Canyonlands National
    Park, Utah as viewed from the Overlook Trail. Upheaval Dome is
    an odd appearing structure in an area of otherwise flat-lying
    sedimentary rocks. While originally believed to be a deeply eroded
    uplift dome from the intrusion of a salt diapir (salt dome),
    evidence now indicates its origin as an ancient meteorite impact
    structure.

    The lighter color rock at center is the Permian White Rim
    Sandstone of the Cutler Group, the prominent cliff faces
    are resistant Jurassic Wingate Sandstone, and in between lie the
    more easily eroded Triassic Moenkopi and Chinle Formations.
    Evidence suggesting that this is an impact structure include the
    orientation of the folds and faults surrounding the structure,
    the finding of shocked quartz in the vicinity, and seismic
    reflection data indicating fractured rock below the structure and the
    absence of a salt dome. Photo taken on June 7, 2010.

    Photo details: Panasonic Lumix DMC-FZ50 camera; 35-400 mm zoom lens
    (f/2.8-3.7); automatic exposure; panorama created from seven images
    stitched together with Hugin 2011.0.0 Panoramic Photo Stitcher.
    * Upheaval Dome, Utah Coordinates: 38.43473, -109.95138

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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 2 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 Tue Apr 19 12:00:42 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.


    Moonrise and Alpenglow over the Dolomites

    April 19, 2022


    MartinD_AZ7Y9016_pub (003)

    Photographer: Martin Dietzel
    Summary Author: Martin Dietzel

    The photo above shows the rising Moon and the sunset-lit Sella
    Mountains of the Dolomites Ranges in northern Italy. Whether
    illuminated by sunlight or moonlight, the thousands of peaks and
    intriguing rock formations of the Dolomites are among the most
    eye-catching in all of Europe. At sunrise or sunset, alpenglow
    often baths these peaks in shades of red, pink and orange. In 2009, the
    stunning Dolomites, also referred to as the Pale Mountains, were
    declared a UNESCO World Heritage site. Photo taken on October 13,
    2021, at 17:20 local time.

    Photo details: Camera: Canon EOS 1Dx camera; 200 mm; f/8; 1/500 sec
    exposure; ISO1000.
    * Wolkenstein, Val Gardena, Italy Coordinates: 46.5564, 11.7551

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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, 1 day, 20 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Thu May 19 12:00:34 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.


    Four Types of Rainbows Over Taiwan

    May 19, 2022

    202202031719_鹿港反射虹_LeeChiahui_IMG-5796a

    Photographer: Chiahui Lee

    Summary Author: Meiying Lee; Cadan Cummings

    The photo above features multiple types of rainbows visible after a
    rain event near Lukang, Taiwan. If you look closely, there are at
    least four rainbows in the photo. The first two are the primary and
    secondary rainbows visible in the center of the image. Primary and
    secondary rainbows are the most common types of bows and are created
    when light is reflected and refracted by raindrops suspended in the
    air. The difference between primary and secondary rainbows is the
    incoming sunlight is reflected only once inside the rain drop for
    primary bows, whereas for secondary bows, the light is reflected a
    multiple time. This additional reflection also causes the secondary bow
    colors to appear reversed.

    Curving between the primary and secondary bows is a reflection
    rainbow produced by sunlight reflecting off calm water or wet sand.
    Looking at the waterlogged road ahead, there is a fourth reflected
    rainbow noticeably on the shimmering pavement surface. Like the
    secondary rainbow, reflected rainbow colors appear reversed. However,
    this additional reflection was due to light being scattered off land
    features, as opposed to within suspended raindrops. Furthermore, if you
    look closely, you can also see supernumerary rainbows on the inside
    of the primary rainbow.
    * Lukang, Taiwan Coordinates: 24.0755, 120.4473

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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 11 weeks, 3 days, 20 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Sun Jun 19 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.


    Timpa Nature Reserve of Acireale

    June 17, 2022

    2022 02 Timpa_2

    Photographer: Vincenzo Russo

    Summary Author: Vincenzo Russo

    The photo above shows the southern part of the “Timpa” of Acireale,
    Italy located on the east coast of Sicily. The Timpa consists of a
    steep cliff overlooking the sea that rises around 500 feet (150 meters)
    and extends for about 3.7 miles or 6 kilometers. It originated from the
    movement of the Acireale fault, one of the most important in the
    eastern region of the Etna volcano. Fault activity started about
    200,000 years ago and lasted for about 100,000 years, which brought out
    numerous layers of volcanic rocks that tell the geological history of
    Etna. The terrain ruggedness makes the area almost inaccessible by
    land. This tough topography has enabled the landscape to remain an
    island of unspoiled nature, despite being located within a highly
    urbanized region. For this reason, it was locally proclaimed a
    nature reserve in 1999. Photo taken on February 6, 2022.

    Photo details: Nikon D810a, Nikon 24-120 mm f/4G, focal length: 30mm,
    f/11, ISO-12800, 1/100 second exposure
    * Acireale, Italy Coordinates: 37.612,15.173

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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 15 weeks, 6 days, 21 minutes
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  • From Black Panther@21:1/186 to All on Tue Jul 19 12:01:36 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.


    New Eddystone Rock

    July 19, 2022

    DSC01114r(1)

    Photographer: John and Ruth Mauel

    Summary Author: John and Ruth Mauel

    There are many volcanic plugs in the world, of which some are quite
    spectacular, and many of them in clusters or fields. Shown
    above is New Eddystone rock located in the Behm Channel, east of
    Ketchikan, Alaska. This eye-catching landform within the Misty
    Fjords National Monument is geologically and historically unusual.

    Named by Captain George Vancouver in 1793 after a lighthouse near
    Plymouth, England, 'New' Eddystone rock is the neck of a volcano that
    erupted approximately 15,000 years ago. Energy from the eruption passed
    through the ice that carved the steep-sided fjords of the area. The
    magma erupted near a seam between the granites and gneisses of the
    Coastal Range Batholith and the Taku terranes. Surrounding rocks were
    weakened by the isostatic rebound caused by the receding of the ice
    sheet. Several similar plugs that erupted around the same time,
    have been eroded and remain below sea level. This difference in form
    could suggest they were scraped flat by the glaciers. Studies have
    also shown these structures are strongly associated with numerous
    smaller flows and volcanic activity as far east as Mount Edziza in
    British Columbia.
    * Behm Channel, Alaska Coordinates: 55.503611, -130.935833

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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 20 weeks, 1 day, 21 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Fri Aug 19 12:01:02 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.


    Carachipampa Volcano, Argentina

    August 19, 2022

    Carlos_pampas_11BIS

    Photographer: Carlos Di Nallo
    Summary Author: Carlos Di Nallo

    Featured above is a photo of the Carachipampa Volcano (dark color
    at right center) located in the province of Catamarca, Argentina, in
    the region called Puna. Pumice stone fields surround the volcanic
    cone, showing that, in the past, the area was the scene of considerable
    volcanic activity.

    Also shown, in the foreground, are salt flats and sand dunes,
    typical of the arid climate that characterizes this region. Panoramic
    photos taken on May 12, 2022.

    Photo details: Canon 6D camera; Canon 17/40mm lens.


    Carachipampa Volcano, Argentina Coordinates: -26.760278, -67.741389


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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 24 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 Sep 19 12:01:10 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.


    Strawberry Moon and Etna Exhaust

    September 19, 2022

    Ormefoto - etna superluna

    Photographer: Orazio Mezzio
    Summary Author: Orazio Mezzio

    The photo above shows the rising Strawberry Supermoon peeking above
    the south-east crater of Mt. Etna as observed on June 14, 2022,
    from near Maletto (Sicily), Italy. The plume from Etna’s late
    May 2022 eruption still lingers but is beginning to fade. It’s the
    glow from the full moon that’s highlighting the sinuous volcanic
    exhaust. Enhancing this evocative view is a thermal inversion that
    acts to keep the plume from dispersing toward the surface or higher
    into the sky.

    Maletto is known locally as the town of strawberries. Because of
    the rich volcanic soil found here, it seems that the strawberries have
    acquired a unique, sweet flavor.

    Photo details: Nikon D750 camera; Nikkor 50 mm lens; Landscape mode;
    f/2; 3.6 second exposure; ISO 100 –- Moon shot at f/3.2, 1/50 second
    exposure, ISO 100.

    Maletto (Sicily), Italy Coordinates: 37.8318, 14.8662


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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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