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Items tagged with: landsat
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Devastation in Maui
Strong winds and dry weather helped fuel destructive wildfires on Hawaii’s second-largest island.go.nasa.gov
Wildfire season is picking up in the U.S.
60 fires are burning across nine states in the western U.S., fueled by hot and dry conditions. On August 1, #Landsat 9 captured this image of smoke streaming away from the Bedrock Fire in Oregon. https://go.nasa.gov/3Kscai8
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Fire Season Heats Up in the West
Following a slow start to the fire season, several blazes burned across the western U.S. in early August.go.nasa.gov
Iceland’s Fagradalsfjall volcano is erupting again, igniting unusually large and long-lasting wildfires in nearby moss that grows atop old lava flows. 🌋
This enhanced-color #Landsat 9 image shows active lava (orange) and burn scars from the moss fires. https://go.nasa.gov/3q98qeJ
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Lava and Smoke Blanket Fagradalsfjall
Lava is once again spilling from the volcano in southwest Iceland, only this time it is igniting moss fires.go.nasa.gov
After the breach of Kakhovka Dam in June 2023, the adjacent reservoir drained, leaving farmers in southern Ukraine to cope with depleted water supplies.
These #Landsat images show the reservoir and two canals before (left) and after (right) the breach. https://go.nasa.gov/3Yh4rt2
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Canals in Ukraine are Drying Up
After the breach of Kakhovka Dam and the flood that ensued, farmers in the area are coping with depleted water supplies.go.nasa.gov
On #WorldEmbroideryDay, Earth inspires some creative threads. 🧵🌎
Artist Danielle Currie titled her piece 46.69, 50.43 after the coordinates of an image caught by #Landsat 8 of the Caspian Sea. https://go.nasa.gov/3Y8TI3E 🌊
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Wildfires broke out on the Greek island of Rhodes after a prolonged stretch of extreme heat.
Actively burning fires are marked by a red infrared signature in this image captured by #Landsat 8 on July 19. https://go.nasa.gov/3Q8xwF2
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Fires Ignite on Greek Islands
Wildfires broke out on Rhodes and other islands amid record heat, forcing thousands to evacuate.go.nasa.gov
After three quiet years, the Shishaldin volcano in Alaska’s Aleutian Islands erupted this month. 🌋
Ash fallout from the eruptions can be seen on the southern flanks of the volcano in this image captured by #Landsat 8 on July 17, 2023. https://go.nasa.gov/3DwFIaF
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Shishaldin Erupts
Ash from recent eruptions blackened the snow-covered flanks of the Alaskan volcano.go.nasa.gov
Now, Landsat Next is on the horizon 🌅
With a trio of smaller satellites that can each detect 26 wavelengths of light and thermal energy,
@nasa/@USGS #Landsat Next will provide finer resolution and more frequent data to monitor Earth’s changing surface. http://go.nasa.gov/3va23GU
[Video embedded in original tweet]
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Next up to Continue NASA/USGS’s Landsat Legacy
With a trio of smaller satellites that can each detect 26 wavelengths of light and thermal energy, the Landsat Next mission is expected to look very different from its predecessors that have been observing Earth for 50 years.Kate Ramsayer (NASA)
Together, OLI and TIRS study all parts of Earth’s surface every 16 days.
From land to ice to sea, the open data provided by the #Landsat program has contributed to a deeper understanding of our changing planet. #OpenScience
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#Landsat 8 and 9 also measure land surface temperature with Thermal Infrared Sensor (TIRS) and TIRS-2. These data are crucial for water management and ice detection.
#DYK that TIRS almost didn’t exist? Now it’s been imaging Earth for over a decade! http://go.nasa.gov/3OSCDbH
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Ten Years of TIRS: Data for a Thirsty World | Landsat Science
Landsat 8 very nearly flew without a thermal infrared sensor. This is the backstory of how TIRS made it onto Landsat 8.https://landsat.gsfc.nasa.gov/article/author/lrocchio/#author (Landsat Science)
51 years of eyes on Earth 👀🛰
Since 1972, the #Landsat program has been studying Earth’s land, water, ice and more.
There are currently three active @nasa @usgs Landsat satellites orbiting Earth — Landsat 7, 8, and 9 — with Landsat Next on the horizon. http://go.nasa.gov/3Nxxl4w
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Landsat Science
This joint NASA/USGS program provides the longest continuous space-based record of Earth’s land in existence.Landsat Science
Algae has covered about half of Florida’s largest freshwater lake, Lake Okeechobee, for much of June and early July 2023.
The @nasa/@usgs #Landsat 9 satellite captured this image of the algae bloom on June 12, which is producing harmful toxins. https://go.nasa.gov/44qmL5a
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Algae Bloom in Lake Okeechobee
Cyanobacteria covered over half of the surface of Florida’s largest freshwater lake in mid-June 2023.go.nasa.gov
Pitstop ahead ✅
Macquarie Island, located halfway between Australia and Antarctica, has been an important stopping place for Antarctic explorers and breeding populations of penguins and seals. 🐧
#Landsat 9 captured this image in 2022. https://go.nasa.gov/44GtNCu
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A Waypoint in the Southern Ocean
Remote Macquarie Island has been a stopover for Antarctic explorers and breeding populations of penguins and seals.go.nasa.gov
Happy #NationalCameraDay! While not a camera per se, #Landsat’s OLI instrument captures beautiful images of our planet. 🌍
The imager on the upcoming Landsat Next satellites will see changes on Earth’s surface with more precise detail than ever before. https://go.nasa.gov/3CSga7v
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Landsat Next | Landsat Science
A New and Revolutionary Landsat Mission Landsat Next is on the horizon—the new mission will not only ensure continuity of the longest space-based record of Earth’s land surface, it will fundamentally transform the breadth and depth of actionable info…Landsat Science
NASA scientists are mapping ground changes on earthquake-prone islands like Tutuila, the largest American Samoa island, in this #Landsat 8 image.🏝️
They found that Tutuila sank an average 6-9 mm per year from 2015-2022, compared to 1-2 mm before 2009. https://go.nasa.gov/3r1XRKg
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Tutuila Island, American Samoa
Volcanoes, rainforests, and reefs abound in this tropical U.S. territory.go.nasa.gov
Noctiluca, is that you?
The @nasa / @usgs #Landsat 9 satellite captured this image of swirling tendrils of phytoplankton – which appear to be Noctiluca scintillans – off the coast of Germany's East Frisia Islands on June 14, 2023. #WorldOceansMonth
🌊 : https://go.nasa.gov/3JryeZU
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Noctiluca in the North Sea?
These swirling tendrils of phytoplankton might be Noctiluca scintillans—a type of marine dinoflagellate known to inhabit this area.go.nasa.gov
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Shrinking Lakes of the Kashmir Valley
Two of the largest lakes in India’s Jammu and Kashmir region have declined in recent years, with implications for water security.go.nasa.gov
Refill, please! 🥛
Shasta Lake, California’s largest reservoir, filled to nearly 100% capacity last month. Heavy rains and meltwater from an above-average snowpack earlier this year helped counter a prolonged drought. https://go.nasa.gov/43Pmok7
#Landsat watched it fill up ⤵️
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California Reservoir Rebound
Shasta Lake refilled in spring 2023 after a season of heavy rain and snowmelt.go.nasa.gov
Are you a summer or winter person? ☀️❄️
The Nemuro Strait in these #Landsat images is one of the largest sand spits in Japan. In the summer, sea grass and kelp can be seen in Notsuke Bay, while in the winter, the bay’s shallow waters freeze over.
https://go.nasa.gov/3INvvcX
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A Sandy Haven in Japan
The shallow waters of hook-shaped Notsuke Peninsula shelter sea grass and shrimp in eastern Hokkaido.go.nasa.gov
Melting winter snowpack and river ice breaking up caused damaging floods along Alaskan rivers in May 2023. https://go.nasa.gov/3Ww0PlX
These #Landsat images show the Yukon River transforming from a frozen, snowy landscape to a thawed one in just 8 days.
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A Tumultuous Spring Breakup
Rapid thawing in Alaska caused damaging river floods in May 2023.go.nasa.gov
Toxic algae blooms are becoming more frequent in some lakes, including Chile’s Lake Villarrica seen in this #Landsat image.
The blooms are likely caused by warmer surface waters and nutrient-laden runoff from urban or agricultural areas. https://go.nasa.gov/423UHCA
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As the glacier stretches and thins, it becomes more prone to rifts that can break and form icebergs.
This @nasa @usgs #Landsat 8 image shows a rift on the floating ice tongue, acquired on May 14, 2023. https://go.nasa.gov/43bj6ra
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Retreat at Petermann Glacier
Decades of retreat are visible from above, but harder-to-see changes below the waterline could also affect this iconic glacier’s future.go.nasa.gov
These #Landsat images show the same estuary in northeastern China 36 years apart.
A salt-loving seepweed turns the coast a deep red in the fall, which highlights how the estuary has changed due to coastal developments from 1986 (left) to 2022 (right). https://go.nasa.gov/3oen6YS
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A Changing Estuary Lined With Red
Satellite observations of seepweed are helping scientists track how these treasured, colorful plants are faring as coastal landscapes in northeastern China change.go.nasa.gov
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High Flow at Glen Canyon Dam
Water managers released a surge of water from the dam in late April to help preserve shrinking sandbars and shoreline habitats downstream.go.nasa.gov
Heavy rains caused flash flooding and landslides in northern Italy on May 2–3, 2023. 🌧
#Landsat satellites captured these enhanced-color images of flooding near the Lamone river before (left) and after (right) the rains. https://go.nasa.gov/3LPXWaO
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A Deluge in Italy
Heavy rains caused destructive flash flooding in the Emilia-Romagna region.go.nasa.gov
The shape of western China’s Qinghai Lake changes as the region’s climate shifts, researchers say.
As water levels drop due to warming trends, dunes build up and divide the lake into several sub-lakes, like Shadao Lake in these #Landsat images. https://go.nasa.gov/3nHiB9b
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Popocatépetl is one of Mexico’s most active volcanoes. 🌋
Its current eruption has been ongoing since 2005. In spring 2023, both #Landsat 8 (left) and @Space_Station astronauts (right) captured images of the volcanic plumes. https://go.nasa.gov/3nExl8y
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Popocatépetl Volcano Keeps on Puffing
One of Mexico’s most active volcanoes continues to put on a show for satellites and astronauts.go.nasa.gov
Multiple studies show dangerous algae blooms have become more frequent and intense in the Gulf of Mannar since 2019.
This #Landsat 9 image from Sep. 23, 2022 shows a bloom in the Gulf of Mannar, off the southeastern coast of India. https://go.nasa.gov/42xvhhx
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Deadly Blooms in the Gulf of Mannar
Though Noctiluca scintillans blooms have long been noted in the shallow gulf, they have become more frequent and intense since 2019.go.nasa.gov
Update on Tulare Lake: still growing.
The historic lakebed, now covered with farms that grow a variety of crops, is flooded after two major storms hit southern California. This enhanced-color image by #Landsat highlights the water in dark blue. https://go.nasa.gov/3NKKJCH
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Tulare Lake Grows
Flooding in the California lakebed continues to spread as spring brings snowmelt from the Sierras.go.nasa.gov
🔗https://earthobservatory.nasa.gov/images/151276/seasonal-flooding-of-the-diamantina-river
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Seasonal Flooding of the Diamantina River
False-color images from Channel Country in the Australian Outback reveal a barren landscape transformed.earthobservatory.nasa.gov
Scientists are using artificial intelligence to analyze 50 years’ worth of @usgs @NASA_Landsat data. 🌏 🛰️
These tools help scientists identify cloud cover or wildfire smoke in #Landsat images, map changes in land cover, and more. https://go.nasa.gov/3HsiNzB
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From Orbit to A.I.—Harnessing Machine Learning with Landsat Data | Landsat Science
Over the past few years, machine learning techniques have been increasingly used to analyze the vast amount of data collected by the Landsat mission, which has been circling the globe for over 50 years.https://landsat.gsfc.nasa.gov/article/author/lrocchio/#author (Landsat Science)
The Catalonia region of Spain is experiencing a long-term drought.
These #Landsat 8 images show the Sau and Susqueda Reservoirs in 2021 (left) and in April 2023 (right), which both have diminished water levels. https://go.nasa.gov/44bzrx6
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Shrinking Reservoirs in Catalonia
Heat and drought have parched reservoirs in northeastern Spain.go.nasa.gov
What are these marks in the ice? 🤔
On March 13, 2023, #Landsat 9 took these images of Tunulliarfik Fjord in Greenland. At the time, the fjord’s waters were capped with a layer of sea ice. 🌊🧊 https://go.nasa.gov/3V4P0m6
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Curious Tracks Criss-Cross an Icy Fjord
Paths that cut across the still-frozen Tunulliarfik Fjord in southern Greenland were likely made by people.go.nasa.gov
Learn how pan-sharpening works: 🔍 https://go.nasa.gov/3AA2pch
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Earth Matters - How to Pan-sharpen Landsat Imagery
climate change, global climate change, global warming, natural hazards, Earth, environment, remote sensing, atmosphere, land processes, oceans, volcanoes, land cover, Earth science data, NASA, environmental processes, Blue Marble, global mapsgo.nasa.gov
After California’s particularly wet winter: a sea of wildflowers. Orange, gold, and yellow flowers flood the valleys and hills of Antelope Valley California Poppy Reserve in this image by #Landsat 8.
https://go.nasa.gov/41FIDYp
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The first erupted on April 7, captured in this image by #Landsat 8, with a second, more powerful eruption on April 10. https://go.nasa.gov/43qAvg6 🌋 🌋
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Kamchatka Erupts
Two powerful eruptions from the peninsula in northeastern Russia sent volcanic material soaring.go.nasa.gov
https://go.nasa.gov/3GBF7X3
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A Flood of Wildflowers
Winter 2023 brought unusually intense rains to Southern California, which was followed by a magnificent bloom of wildflowers in spring.go.nasa.gov
These #Landsat images show before (left) and after (right) flood waters from two nearby rivers filled Lago La Niña. 🌧️ https://go.nasa.gov/40XmxAN
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Warming Water and Downpours in Peru
As coastal waters heat up, torrential rains and floods are swamping the northern part of the country.go.nasa.gov
It’s Crater Lake in Oregon! At 1,943 feet (592 meters) deep, Crater Lake is the deepest lake in the United States and among the deepest in the world. #Landsat captured this picture of the lake on March 18, 2023.
🔗https://earthobservatory.nasa.gov/images/151161/a-clear-view-of-crater-lake
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A Clear View of Crater Lake
The lake is especially scenic in early spring when its deep-blue waters contrast with a blanket of snow on land.earthobservatory.nasa.gov