A team of scientists found something hidden off the coast of Alaska that suggests a significant risk for future tsunamis in the area. The team made the discovery as they were conducting seismic surveys off the Alaskan coast to better understand the regional plate tectonics and subduction. The research, published in Nature Geoscience, provides evidence for an increased tsunami risk in an area previously thought to be low risk for tsunamis. The feature was found by a research team at the Lamont-Doherty Earth Observatory of Columbia University. It is similar to the feature that produced the devastating Tohoku tsunami in 2011 off Japan, which killed approximately 20,000 people and caused three nuclear reactors to melt down.
New research finds large earthquakes can trigger underwater landslides thousands of miles away, weeks or months after the quake occurs. Researchers analyzing data from ocean bottom seismometers off the Washington-Oregon coast tied a series of underwater landslides on the Cascadia Subduction Zone, 80 to 161 kilometers (50 to 100 miles) off the Pacific Northwest coast, to a 2012 magnitude-8.6 earthquake in the Indian Ocean -- more than 13,500 kilometers (8,390 miles) away. These underwater landslides occurred intermittently for nearly four months after the April earthquake.
Tonga is a seismologists' paradise, and not just because of the white-sand beaches. The subduction zone off the east coast of the archipelago racks up more intermediate-depth and deep earthquakes than any other subduction zone, where one plate of Earth's lithosphere dives under another, on the planet. Tonga is such an extreme place, and that makes it very revealing," said S. Shawn Wei, a seismologist who earned his doctorate at Washington University in St. Louis and now is a postdoctoral fellow at the Scripps Institution of Oceanography in San Diego. That swarm of earthquakes is catnip for seismologists because they still don't understand what causes earthquakes to pop off at such great depths.
Most volcanic eruptions on Earth happen in a hidden, dark place: deep underwater. Scientists rarely detect these outbursts on the sea floor, but last year, they caught a seamount eruption in the act. Now, researchers have characterized it in unprecedented detail—showing how a rash of earthquakes preceded the eruption and how bulging of the volcano’s surface was used to successfully forecast the eruption. Scientists say the results will help them understand how other volcanoes around the world behave.
What may be the largest exposed fault on Earth has been seen and documented by scientists for the first time. The 'Banda Detachment' fault in eastern Indonesia would explain a 7.2km (4.4 mile) deep abyss under the Banda Sea, which until now has remained a mystery to geologists. This area where the fault was found sits in the Ring of Fire, an area in the basin of the Pacific ocean where many volcanic eruptions and earthquakes occur. Sitting under the Banda Sea is the Weber Deep – the deepest point in our planet's ocean that does not sit in a trench.
After an earthquake, less than 20% of the carbon in the water from plants and soil had been released through oxidation before being carried away by the river. Thus, they estimate that most of the 14 megatonnes of carbon that was probably released by the earthquake ended up being stored away.
The motion of the ocean is rocking our world, or at least helping to give it a vigorous shake in some locations when the conditions are right, a team of seismologists says.
There will be a 7-day training workshop at Lamont-Doherty Earth Observatory for students and early-career scientists who want to gain experience with the analysis of multichannel seismic reflection data from June 22-29, 2015.
An ocean engineer at the University of Rhode Island has found that a massive underwater landslide, combined with the 9.0 earthquake, was responsible for triggering the deadly tsunami that struck Japan in March 2011.
New research has revealed the causes and warning signs of rare tsunami earthquakes, which may lead to improved detection measures.
Radiation In Calif. Kelp? Scientists To Test West Coast Water 3 Years After Fukushima Nuclear Meltdown
California biologists plan to test coastal kelp for traces of radioactive material three years after the nuclear meltdown in Fukushima, Japan.
Every morning, hundreds of pounds of fresh fish, hauled in from ports across eastern Japan, is rushed to this sleepy town hours away from the capital.
Radiation levels in seawater just outside one of the damaged Fukushima reactors spiked this week to the highest level in two years
The devastating earthquake that struck Japan in 2011 may have unexpectedly released nearly all of the energy that had built up near the source of the resulting tsunami, new research suggests.
The National Science Foundation has notified Oregon State University that it will be the lead institution on a project to finalize the design and coordinate the construction of as many as three new coastal research vessels to bolster the marine science research capabilities of the United States.
An international team of scientists has just returned from an ocean drilling expedition on board the JOIDES Resolution, near the Pacific coast of Costa Rica, designed to study the subduction zone where the Cocos tectonic plate dips beneath the Caribbean plate.
Debris from last year's Japanese tsunami has already started landing on the West coast of the United States, and people living in Oregon are bracing themselves for more in the next few weeks, when the winter storms begin.
This month, Brazil officially joined the Integrated Ocean Drilling Program (IODP), bringing the total membership to 26 countries on five continents.
Brazil recently joined an international marine research effort to document environmental change by monitoring and sampling the unseen world beneath the sea floor.
The next major milestone in construction of the Ocean Observatories Initiative (OOI) program’s Regional Scale Nodes (RSN) cabled network component is scheduled for completion this summer with the installation of the primary nodes, the seven main connection points on the network for power and communications. That critical work began in July.
Scientists have just returned from an expedition onboard the research vessel JOIDES Resolution, during which they recovered five kilometers of core samples from an area never before drilled.
Some of the most powerful earthquakes emanate from remote ocean-floor faults. Geophysicists are now laying networks of sensors to keep tabs on these hidden killers.
New samples of rock and sediment from the depths of the eastern Pacific Ocean may help explain the cause of large, destructive earthquakes similar to the Tohoku Earthquake that struck Japan in mid-March.
Heavy Metal Meets Hard Rock: Battling through the Ocean Crust’s Hardest Rocks to Capture the Boundary Between Magma and Water
Scientists and drillers recovered a remarkable suite of heat-tempered basalts that provide a detailed picture of the rarely seen boundary between magma and seawater.
A new survey of barrier islands published earlier this spring offers the most thorough assessment to date of the thousands of small islands that hug the coasts of the world's landmasses.
Global climate change, earthquakes, and tsunami generation are some of the most pressing geoscientific challenges of the 21st century. Scientific ocean drilling is a key tool to investigate these phenomena and fundamental questions in Earth and life sciences.
Japan’s 9.0 Tohoku-Oki Earthquake: Surprising Findings About Energy Distribution Over Fault Slip and Stress Accumulation
When the magnitude 9.0 Tohoku-Oki earthquake and resulting tsunami struck off the northeast coast of Japan on March 11, they caused widespread destruction and death.
An international team of scientists report on the first observatory experiment to study the dynamic microbial life of an ever-changing environment inside Earth’s crust.
The 470 foot scientific research vessel JOIDES Resolution of the Integrated Ocean Drilling Program (IODP), will come to Puntarenas, Costa Rica 13-16 April 2011.
During the month of March, the U.S. Implementing Organization (USIO) and the U.S. Science Support Program (USSSP) staff have been closely following updates from their Japanese colleagues who work at Tokyo-based IODP-Management International (IODP-MI)
In the aftermath of the Great Taiheiyou, Japan, earthquake and resulting tsunami of March 11, media coverage has focused not only on the devastation but on a myriad of questions raised around the world about coastal preparedness, early warning capabilities and seismic monitoring on land and at sea.
Puntarenas, Costa Rica – If there was ever a “teachable moment” in the Earth sciences, it is now, in the wake of the devastating earthquake and tsunami that struck Japan late last week.
In the latest evidence of the vastness remaining to be explored in the world's oceans, scientists aboard Scripps Institution of Oceanography at UC San Diego's research vessel Melville are mapping a series of colossal and previously uncharted undersea mountains in remote areas of the South Atlantic Ocean.
Nature rarely hands over her secrets without a fight. Solving our planet's mysteries means doggedly following clues that may only reveal a small part of the story.
Louisville Seamount Trail co-chief scientist and expedition leader Anthony Koppers will give a public talk at the Auckland Museum on the highlights of their recent expedition and the expected outcomes of the ongoing research on Sunday, February 13 at 5.30pm.
Ocean Leadership has compiled a 2010 Year in Review for our newsletter readers. We hope that this gives you a great understanding of the breadth of work that our organization completed in 2010.