Geology & Geophysics
One of the Greatest Volcanic Shows on Earth
About 50,000 years ago, a huge meteorite smacked into our planet, gouging a hole more than a mile wide and 790 feet deep in India. Of the roughly 150 known […]
Read MoreAnalyzing Ancient Sediments at Warp Speed
Like a toy out of a science fiction story, the X-ray fluorescence core scanner reveals intimate details of the composition of ancient mud and sediment–which can contain a variety of clues about past climate and environmental conditions on Earth–without breaking the surface. In a matter of hours, the XRF simultaneously captures digital photographs and X-ray images of every millimeter of a core sample, while detecting the presence of any of 80 chemical elements.
Read MoreTracking an Ocean of Ice Atop Greenland
Sarah Das calls herself a “frozen oceanographer.” Most people look at Greenland and see a vast ice sheet covering Earth’s largest island. But Das sees a huge reservoir of water—temporarily […]
Read MoreNafanua, Eel City, and the Crater of Death
WHOI geochemist Stan Hart and colleagues have discovered a fast-growing volcano, dubbed Nafanua, inside the crater of Vailulu’u, a 14-300-foot active volcano that should begin the next island in the Samoan chain. They also found a novel hydrothermal community, which they named “Eel City,” and a lifeless zone in the caldera, which they call the “Crater of Death.”
Read MoreThe Once and Future Danube River Delta
?The Danube River Delta is like the Everglades,? said Liviu Giosan, who grew up near the Romanian wetlands. The triangle-shaped, sediment-rich region at the mouth of the Danube River is also rich with human history. A traditional maritime culture persists on the delta, and the United Nations has declared the region a World Heritage site. The Danube Delta is also a great place for a geologist to study how the coast stretches, contracts, and undulates with time?and human interference.
Read MoreHart Elected to American Academy of Arts and Sciences
Senior Scientist Stanley Hart of the WHOI Geology and Geophysics Department has been elected a Fellow of the American Academy of Arts and Sciences, one of the oldest learned societies in the nation.
Read MoreOceanographic Telecommuting
‘Virtual’ chief scientist directs a research cruise without leaving land.
Read MoreRambling Atop an Active Volcano to Detect Telltale Rumbling Within It
With machete in hand and 60 pounds of satellite receiver and tripod on his back, Jeff Standish looked up into the lush tropical brush that covered the volcano, up a steep escarpment, and up again to the summit 3,000 feet above sea level. Then he turned to Rhea Workman, a graduate student in the WHOI/MIT Joint Program, and said, “We’re going up where?”
Read MoreRapid Response
The earthquakes were coming fast and frequent, as many as 50 to 70 an hour. On the morning of Sunday, Feb. 28, undersea hydrophones began detecting the most intense swarm of earthquakes to occur in the last three years along the Juan de Fuca Ridge, about 200 miles off the Pacific Northwest coast.
Read MoreMIT/WHOI Graduate Leads the World’s Tsunami Awareness Program
Kong, a 1990 graduate of the MIT/WHOI Joint Program in Oceanography/Applied Ocean Science and Engineering, was one of the first people in the world to learn the magnitude of the underwater earthquake off the coast of Indonesia.
Read MoreWhat Could a Tsunami Network Look Like in the Future?
The Deep-ocean Assessment and Reporting (DART) system is battle-tested and operational, so it makes sense to use such buoys to address the immediate need for a tsunami network. Researchers at WHOI are concentrating on the next generation of multidisciplinary ocean observing platforms.
Read MoreBuilding a Tsunami Warning Network
Since the great Indonesian earthquake and tsunami of December 26, 2004, policy-makers and scientists around the globe have been embracing a rare moment of public attention on the oceans, accelerating plans to create a comprehensive tsunami-warning network and to make citizens better prepared for the next massive wave. Another potent earthquake along the same fault on March 28, 2005, has increased that sense of urgency.
Read MoreIn the Tsunami’s Wake, New Knowledge About Earthquakes
If any good has come from the recent devastating earthquakes off Sumatra, it is that they are providing scientists with unprecedented clues to understanding how these large undersea earthquakes occur and how they create tsunamis.
Read MoreThrowing DART Buoys into the Ocean
Deep Ocean Assessment and Reporting of Tsunamis (DART) buoys are the foundation of warning network
Read MoreTsunamis in the Caribbean? It’s Possible.
In a study published Dec. 24, 2004, in the Journal of Geophysical Research, Woods Hole geologists Uri ten Brink and Jian Lin reported a heightened earthquake risk from the Septentrional fault zone, which cuts through the highly populated Cibao valley in the Dominican Republic.
Read MoreRising Sea Levels and Moving Shorelines
Changes to the shoreline are inevitable and inescapable. Shoals and sandbars become islands and then sandbars again. Ice sheets grow and shrink, causing sea level to fall and rise as water moves from the oceans to the ice caps and back to the oceans. Barrier islands rise from the seafloor, are chopped by inlets, and retreat toward the mainland. Even the calmest of seas are constantly moving water, sand, and mud toward and away from the shore, and establishing new shorelines.
Realizing the Dreams of da Vinci and Verne
Leonardo da Vinci made the first drawings of a submarine more than 500 years ago, and Jules Verne published 20,000 Leagues Under the Sea in 1875. But only in the past few decades has the dizzying pace of technological advances allowed us to realize their dreams of exploring the ocean depths and taking humans to the seafloor.
Read MoreUnique Vehicles for a Unique Environment
For climatologists and physical oceanographers, it is often said that the Arctic is a canary in the environmental coal mine. In the isolated Arctic Ocean Basin, a variety of oceanographic and other processes have conspired to create a layer of cold, salty water called a halocline, which shields the sea ice from underlying warmer waters that would otherwise melt it.
Read MoreEars in the Ocean
If you sought to delve into the forces that drive and shape the face of the earth and that distinguish it from all other planets in our solar system, you would shine a spotlight on the mid-ocean ridges.
Read MoreEarthshaking Events
When I was still a schoolboy in China, two major earthquakes occurred, about a year apart. They had a profound impact on my life and on the Chinese people.
The first […]
Read MorePeering into the Crystal Fabric of Rocks
“Rock solid” is an oxymoron, to my way of thinking. Oh, the expression does have some truth in that minuscule, superficial portion of our planet where humans dwell. But the majority of rocks nearly everywhere else in the earth are continually changing their physical characteristics.
Read MoreEarth’s Complex Complexion
Even as you read this, Earth’s crust is continually being reborn and recycled in a dynamic process that fundamentally shapes our planet. We’re not generally aware of all this action because most of it occurs at the seafloor, under a formidable watery shroud, and often in remote regions of the oceans.
Read MoreUnraveling the Tapestry of Ocean Crust
Most people know that oceans cover about 70 percent of Earth’s surface. Fewer people realize that the crust beneath oceans and continents is fundamentally different. Why this is so remains a mystery that scientists are still trying to solve.
Read MorePaving the SeafloorBrick by Brick
Most of Earth’s crust is manufactured at the bottom of the sea. Deep beneath the waves and beyond our view, magma erupts along a 40,000-mile volcanic mountain chain that bisects the ocean floors and encircles the globe. The lava flowing from these mid-ocean ridges solidifies into new ocean crust that spreads out and paves the surface of our planet.
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