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 - Casa do Penedo in Portugal

January 19, 2020

The_Flintstone_House_1200 (2)

Each Sunday we present a notable item from our archives. This EPOD was
originally published January 18, 2014.
Photographer: Andre Vicente Goncalves
Summary Author: Andre Vicente Goncalves
This intriguing stone house in the Fafe region of northern Portugal
has a prehistoric-look and resembles the Flintstone's cartoon
house. In fact, this house was built in 1972 between four huge
limestone boulders. The locals refer to it as the Casa do
Penedo -- penedo means big rock in Portuguese. According to the owner
the house has no electrical power and the only part of the exterior
not made of stone are the door frame and windows. The furniture is made
of tree trunks. The sofa, for example, is made of a large
eucalyptus trunk that weighs approximately 770 lbs (350 kg). Photo
taken on October 22, 2011.

Photo Details: Camera: Canon EOS 5D Mark II; Lens: EF16-35mm f/2.8L II
USM; Focal Length: 16mm; Aperture: f/10.0; Exposure Time: 2.000 s; ISO
equiv: 50; Software: Adobe Photoshop CC (Macintosh).
* Casa do Penedo, Portugal Coordinates: 41.488165, -8.067733

Related EPODs

Archive - Casa do Penedo in Portugal Archive - Landscape
Boundary: The Mogollon Rim Bisti Wilderness Mushrooms Dreamy
Night on Mount Etna Kīlauea Iki Crater Archive - Solstice to
Solstice Changes in Sunlight at Falmouth, Maine
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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 7 weeks, 1 day, 14 hours, 54 minutes
* Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)

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.


Crescent Moon and Jupiter Conjunction Above Evia Island, Greece

February 19, 2020

Moon & Jupiter 2020-01-23 (1)

Photographer: Dimitris Malliaris
Summary Authors: Dimitris Malliaris; Jim Foster

Featured above is a sliver of the waning Moon and the planet
Jupiter as they ascend over the mountains on Evia Island, Greece,
on the morning of January 23, 2020. Although the morning was chilly (28
F or -2.5 C), atmospheric conditions were perfect for observing –-
clear, calm and low humidity. The crescent Moon was only 2 percent
illuminated and was just hours from the new Moon phase. If you’re
up early tomorrow morning, watch for the waning crescent Moon in
the eastern sky, along with Jupiter, Saturn and Mars.

Photo Details: Pentax K-3 II camera, Pentax HD DA 55-300 mm lens;
F4.5-6.3; ED PLM WR RE lens; 150 mm focal length; ƒ/6.4 aperture; 1/2
sec. exposure time, ISO:100; Adobe Photoshop CC (Windows).
* Pissonas, Greece Coordinates: 38.5236, 23.8585

Related EPODs

Crescent Moon and Jupiter Conjunction Above Evia Island, Greece
Archive - Petrified Forest of Theodore Roosevelt National Park
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Rithet’s Bog on Vancouver Island
More...

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 4 weeks, 15 hours, 5 minutes
* Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)

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.


Path of the Sun on the Days of the Equinox and Solstice

March 19, 2020

Didascalica

Photographer: Marcella Giulia Pace
Summary Authors: Marcella Giulia Pace; Giuseppe De Donà

This image shows the (apparent) path of the Sun from about noon to
sunset during the days of the equinoxes and the summer and winter
solstices. I made these observations from Gatto Corvino village,
Sicily, Italy. To show as much of the path as possible, I chose a field
where the western horizon was clearly visible and always shot from the
same spot -- every 10 minutes, beginning at true local noon.

At the time of the equinoxes, the Sun is approximately 53 degrees
above this field at local noon. By the time of the summer solstice, the
Sun reaches 77 degrees, but in December, it’s just 30 degrees above the
field at local noon. Note that on the day of the vernal and autumnal
equinoxes, for any latitude on Earth, the Sun rises exactly in
the east and sets exactly in the west.

Photo Details: Camera: NIKON D7100; Software: Adobe Photoshop CC 2014
(Macintosh); Exposure Time: 1/800 sec; Aperture: ƒ/22; ISO equivalent:
100; Focal Length (35mm): 16; Lens: Tokina AT-X 116 PRO DX 11-16mm
F2.8.
* Gatto Corvino, Italy Coordinates: 36.8128, 14.5692

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Path of the Sun on the Days of the Equinox and Solstice
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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 8 weeks, 1 day, 14 hours, 5 minutes
* Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)

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 Ararat at Sunset

June 19, 2020

IMG_1117 copy

Photographer: M.Taha Ghouchkanlou
Summary Authors: M.Taha Ghouchkanlou; Jim Foster

Shown above is snow-capped Mount Ararat in far eastern Turkey, as
viewed at sunset from northwestern Iran. This dormant, compound
stratovolcano is the highest summit in Turkey, at 16,946 ft or 5,165 m
– high enough to be snow-covered throughout the year. Several hundred
miles north of the boundary between the Eurasian Plate and the
Arabian Plate, the underlying cause of its vulcanism is imperfectly
known.

In the foreground, a group of nomads is settling in the for the
night. Their versatile tents are woven from the hair of black goats
that they tend. Photo taken on June 18, 2017.

Photo Details: Camera: Canon EOS 6D; Software: Adobe Photoshop CC 2019
(Windows); Exposure Time: 0.0080s (1/125); Aperture: ƒ/5.6; ISO
equivalent: 400; Focal Length: 70.0mm.
* Mount Ararat, Turkey Coordinates: 39.7024, 44.2991

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Mount Ararat at Sunset Acatenango and Fuego Sapphire Cove
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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 21 weeks, 2 days, 16 hours, 4 minutes
* Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)

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 - Diamond Hunt

July 19, 2020

Dia

Each Sunday we present a notable item from our archives. This EPOD was
originally published July 19, 2003.

Provided by: Shannon L. Story
Summary author: Shannon L. Story

During a visit to Crater of Diamonds State Park in Arkansas, a friend
and I spent an afternoon digging for diamonds in the only diamond mine
in America open to the public. The 37-acre field is the eroded surface
of an ancient, volcanic pipe. More than 75,000 diamonds have been found
at Crater of Diamonds. Any gems you unearth at the park (large or
small) you can keep. The largest diamond ever found there was a
40.23-carat beauty called "Uncle Sam." It's the largest diamond ever
unearthed in the United States. It takes millions of years for a
diamond to form out of pure carbon. The hardest substance known,
diamonds form 75 to 120 miles (120-200 kilometers) below the surface of
the earth. When temperatures and pressures are exactly right, carbon
atoms bond to make "a girl's best friend," the diamond.


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Archive - Diamond Hunt Archive - Gneiss and Sandstone Layers
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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

--- up 3 days, 15 hours, 25 minutes
* Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)

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.


Olympic Peninsula Bluff and Beach

August 19, 2020

Joe_epod

22bbbbbb Photographer: Joe LaCour
Summary Author: Joe LaCour
Like layers of paint on an old cottage door, the layers of ancient
soils, compacted glacial till, glaciomarine drift and
proglacial alluvium on this coastal bluff in Washington State are
plainly visible. During the late Pleistocene, the north Olympic
Peninsula coast was at the intersection of mountain glaciers to the
south and a continental glacier to the north. Bluffs as shown in
the top photo extend all along the shores of the Olympic Peninsula and
are generally easy to access. These photos, taken on the west side of
Sequim Bay, were taken at low tide when I was able to obtain a
better view of the cliff. In my hand is one of a number of interesting
rocks I found on this beach; it appears to be a breccia with a
granite vein.

Photo Details: Leica M9; 35 mm; ISO 160; f/5.7; 1/360 second exposure.
* Sequim Bay, Washington Coordinates: 48.0711, -123.0266

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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 4 weeks, 6 days, 15 hours, 25 minutes
* Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)

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.


EPOD 20th - Aerial View of Danakil Depression

September 19, 2020

DANAKILDEP
We’re celebrating 20 years of Earth Science Picture of the Day during
the month of September! Today’s photo features a popular EPOD from the
past. Thanks to all of our followers (on the blog, Facebook, Instagram
and Twitter) for supporting us. Thanks also to all of you who’ve
submitted your photos. We’re most appreciative. This EPOD was
originally published April 16, 2016.

Photographer: Joel Santos
Summary Author: Joel Santos

April 2016 Viewer's Choice Shown above is an aerial photograph of
the Danakil Depression region of Ethiopia showing patterns of
harvested salt (top and bottom) and a caravan of miners and
dromedaries (center) on their way to the salt extraction sites.
At these sites chunks of salt are cut like bricks and then loaded on
the camels. Note their shadows (traveling north) in the low Sun on
the trail at right-center.
The ‪Danakil‬ Depression, also known as the Afar Depression, is
located below sea level. Salt deposits here result from the Red
Sea periodically flooding the depression and then
evaporating. However, the most recent such flood occurred roughly
30,000 years ago. Click here to see the impressive, aerial video
footage from this region. Photo taken on March 8, 2016.
* Danakil Depression, ‪Ethiopia Coordinates: 14.2418, 40.3004
-
Earth Science Picture of the Day is a service of the Universities
Space Research Association.

https://epod.usra.edu

--- up 3 weeks, 4 days, 20 hours, 20 minutes
* Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)

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.


Refraction of Sound Waves

October 19, 2020

Dungeness Field Joe LaCour

Photographer: Joe LaCour
Summary Author: Joe LaCour

The field next to our property in Dungeness, Washington provides an
example of the refraction of sound waves. When the wind is calm,
and the sun has heated the air close to the ground higher than the air
above the ground, the sound travels faster close to the surface and
slower above the surface. With this temperature gradient sound is
curved upward, and the vehicles traveling on the road can hardly be
heard. But when there’s no temperature gradient because of a thick
overcast or it’s windy, the road noise is very loud. The inverse
example is the noise from jet aircraft on Whidbey Island being
heard on the Olympic Peninsula. When the cold water in the
Strait of Juan de Fuca has cooled the air close to the surface to a
lower temperature than the air above the surface, sound is curved
downward and the concentrated sound travels along the surface. Thus the
sound can be very loud quite a distance away.

Photo Details: Camera: Leica M9; Lens: Summicron 35mm; Exposure Time:
0.0028s (1/360); Aperture: ƒ/8.0; ISO equivalent: 60; Focal Length
(35mm): 5.
* Dungeness, Washington Coordinates: 48.14406, -123.11791

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Northern Lights
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Applied Sciences Links

* BBC: World Water Crisis
* Indoor Air Quality
* Mathematics in Nature
* A Mathematical Nature Walk
* NASA: Applied Earth Sciences
* Remote Sensing Tutorial

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

https://epod.usra.edu

--- up 7 weeks, 6 days, 20 hours, 21 minutes
* Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)