earth-science12.61 min read
Iceland’s Quiet Undersea Volcanoes Turn Explosive
22 minutes ago•Source: Quanta Magazine
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4.45 min•7 days ago
Ancient Lake Agassiz Leaves Fertile Footprint on Canadian Farmland
NASA's Earth Observatory explains that the ancient glacial Lake Agassiz deposited nutrient-rich sediments along the southern shore of Lake Winnipeg, creating the fertile farmland that persists today, shaped by the Dominion Land Survey grid; an April 2026 ISS photo shows snow-covered fields and crops like wheat, barley, oats, and canola in southeastern Manitoba.
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Geochemical Clues Hint Africa May Be Forming a New Tectonic Boundary
Gizmodo•14 days ago
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Victoria’s Valley Fog and Arch Cloud Captured by NASA
NASA Science (.gov)•14 days ago
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Colorful Coastal Waters Signal Spring Phytoplankton Blooms Off the Mid-Atlantic
NASA's Earth Observatory used MODIS imagery to show vivid greens and turquoises off the Delaware–New Jersey–Virginia coast, where spring phytoplankton blooms—dominated by diatoms with coccolithophores mixed in—color the shallow Mid-Atlantic Bight; advances from the PACE mission are improving bloom detection in these optically complex coastal waters.
Antarctic Vortex Streets: Spirals Form Behind Peter I Island
NASA's Earth Observatory highlights a Landsat 8 image showing von Kármán vortex streets forming downwind of remote Peter I Island in the Bellingshausen Sea, created by Antarctic winds that bend around the island; the spiraling cloud patterns reveal atmospheric eddies around the ice-cloaked volcano, and the piece also notes the island's discovery in 1821, its shield-like summit crater, and past reconnaissance like Operation IceBridge in 2011.
Ahuachapán’s Volcanic Heat Powers Energy and Signals Hazards
NASA’s Image of the Day spotlights western El Salvador’s Ahuachapán region, where a arc of volcanoes sits above a geothermal field that powers a long-running plant; while Santa Ana and Izalco are notable peaks, the area features fumaroles, hot springs, and steam vents, reflecting a landscape where heat fuels electricity yet can provoke eruptions and evacuations.
Unprecedented Retreat of Hektoria Glacier Signals Rapid Antarctic Change
NASA's Earth Observatory documents an unusually rapid retreat of Hektoria Glacier on the eastern Antarctic Peninsula, with about 25 km of length lost between 2022 and 2023 (including an 8 km burst), driven by its ice-plain geometry that allows seawater to destabilize the bed and trigger buoyancy-driven calving; the event underscores how even smaller glaciers can contribute to sea level rise, and upcoming missions like NISAR and SWOT will help monitor such rapid changes.
Your Backyard Through Time: 320 Million Years of Latitudinal Drift Mapped
A tool called paleolatitude.org, built on the Utrecht Paleogeography Model, lets users input any location to see how its latitude changed over the past 320 million years, aiding paleoclimatology and paleontology by linking rocks to their original plates. It does not show longitude or animate the movement.
PACE Opens a Multispectral Window on Earth’s Oceans, Atmosphere and Life
NASA’s PACE satellite uses hyperspectral imaging and polarimeters to monitor Earth’s oceans, atmosphere, and land—tracking dust and wildfire smoke plumes, mapping three-dimensional cloud structure, identifying ship-induced cloud effects, and detecting phytoplankton types (including diatoms) and blooms such as cyanobacteria in the Great Lakes and Karenia off Australia. These data help warn water managers, support emergency response, and deepen climate and ocean ecosystem understanding, while Artemis II imagery showcases Earth from space.
Green Corridors Along the Capital Beltway: A NASA Earth Observatory View
NASA’s Earth Observatory features an ISS image of the Capital Beltway’s northeast side near Greenbelt, Maryland, highlighting Greenbelt Park and surrounding green spaces amid suburban development, with nearby institutions like the Goddard Space Flight Center and University of Maryland noted; the photo, taken July 30, 2023, captures a landscape shaped by New Deal planning and ongoing preservation of green spaces.
The Sahara's Eye Unveiled: A Landsat View of the Richat Structure
NASA’s Eye of the Sahara, the Richat Structure in Mauritania, is a 40-km-wide circular geologic dome formed by an igneous intrusion and differential erosion, not an impact crater. A Landsat 8/9 mosaic highlights concentric ridges (cuestas) and the orange-gray color differences that reflect diverse rock types, set on the Adrar Plateau amid wind-sculpted dunes and ancient river channels. First described in the 1930s and popularized after early spaceflight imagery, the feature’s striking “bull’s-eye” shape is a striking example of how geological forces shape the landscape.
Yellowstone's Heat Source Traced to Shallow Mantle, New Study Finds
A new 3D model of Yellowstone and the Eastern Snake River Plain suggests tectonic forces within the lithosphere drive magma generation and migration from the shallow mantle (upper asthenosphere) into a complex plumbing system, rather than a deep mantle plume powering a single giant chamber. This tectonically controlled magma movement could improve eruption forecasting and hazard assessment for the park’s massive caldera, whose last major eruption occurred about 630,000 years ago and is not expected imminently.
Japan's Submarine Caldera Begins Recharging With New Magma
Using underwater seismic imaging, researchers mapped a large magma reservoir beneath Japan's Kikai caldera and confirmed the current magma is newly injected rather than leftover from the last eruption, with a lava dome forming over thousands of years. The findings suggest a recharging cycle for giant calderas and could improve monitoring of future eruptions at calderas like Yellowstone and Toba.