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Daily Mail
18-05-2025
- Science
- Daily Mail
Massive volcano in Pacific Northwest is showing signs of re-awakening
A volcano in the Pacific Northwest is showing signs of activity with an eruption imminent. The Axial Seamount is a mile-wide underwater volcano that sits 300 miles off the coast of Oregon and more than 4,900 feet below the surface of the Pacific Ocean. Researchers with the National Science Foundation's Ocean Observatories Initiative have been monitoring this inevitable underwater explosion and now say that the volcano is giving off signs of becoming active. Situated along the Juan de Fuca Ridge, a chain of undersea volcanoes extending between Oregon and Alaska, Axial Seamount is a young shield volcano - a broader volcano with a low profile. Based on the 2015 eruption, Chadwick added that this year's magma explosion could produce a lava flow that's nearly as tall as Seattle's Space Needle. However, if Axial Seamount does blow within the next few days, experts say it won't pose any threat to communities along the West Coast. It's too deep and far from shore for people to even notice when it erupts, and it has no impact on seismic activity on land. Although few people have felt the tremors, the region has seen a sharp rise in the number of earthquakes in just the last month, with a major spike in activity recorded on April 13. Since May 6, the number of daily earthquakes under the seamount has been steadily rising. The number of underwater quakes is expected to skyrocket during this event, rising from several hundred per day right now to 10,000 earthquakes within a 24-hour period as magma flows out of the seafloor volcano, according to Interesting Engineering. Mike Poland, a scientist at the Yellowstone Volcano Observatory, expressed excitement about the eruption, highlighting Axial Seamount as one of the world's best-monitored submarine volcanoes. 'This particular volcano is probably the best-monitored submarine volcano in the world,' he told Cowboy State Daily. 'It's fascinating and doesn't really pose a hazard.' Despite the growing anticipation among scientists, Axial Seamount's next eruption will likely come as a surprise to everyone tracking it. Wilcock's best guess is that the swelling lava finally erupts later in 2025 or even early 2026, but there's still chance it happens much sooner. Scott Nooner, a professor of geophysics at the University of North Carolina Wilmington, told NBC News: 'It's much harder than forecasting the weather, even though the weather is a very difficult thing to forecast already.' 'There's still so much that we don't understand about what triggers eruptions and how magma moves around underneath the Earth's surface,' he added. Eruptions from Axial Seamount were recorded in 1998, 2011, and 2015, and the volcano has undoubtedly erupted numerous times prior to those events, according to Poland. In November 2024, Chadwick started investigating the volcano when he noticed its surface had swelled to nearly the same height it reached before its last eruption 10 years ago. The swelling that occurred prior to the 2015 eruption allowed Chadwick and his colleagues to predict that event. This time, the researchers' observations told them that Axial Seamount would erupt before the end of 2025. They also found that seismic activity at Axial Seamount had increased, with hundreds of earthquakes generated around the volcano per day and earthquake swarms greater than 500 per day. Wilcock said the first sign that an eruption from this volcano is imminent would be a sharp increase in the number of earthquakes around it - which the area is now experiencing. The team shared their findings at the annual American Geophysical Union conference in December 2024. This impending eruption will be a major research opportunity for Wilcock and other scientists, who plan to use a suite of high-tech instruments to monitor the eruption from start to finish. The University of Washington's College of the Environment hosts one of the largest underwater observatories in the world, comprised of networks of sensors along the seafloor and throughout the ocean waters. When Axial Seamount finally erupts, Wilcock and his colleagues will use this array to gather data and images of the event as it unfolds. Even though Axial is not a dangerous undersea volcano, the forecasting capabilities scientists have gained from studying it could help them predict eruptions from those that are. Nooner pointed out that when forecasters are wrong with their eruption predictions on land, it can cost people bother time and money through unnecessary evacuations. Watching the seamount explode will allow scientists to test out their latest forecasting models without the repercussions of getting it wrong in a populated area.
CNN
08-05-2025
- Science
- CNN
Underwater volcano off the coast of Oregon could erupt soon, scientists say
Things are heating up hundreds of miles off the coast of Oregon, where a large undersea volcano is showing signs of impending eruption, scientists say. The volcano, known as Axial Seamount, is located nearly 1 mile (1.4 kilometers) underwater on a geological hot spot, where searing gushes of molten rock rise from Earth's mantle and into the crust. Hotspot volcanoes are common on the seafloor. But Axial Seamount also happens to be located on the Juan de Fuca Ridge — an area where two massive tectonic plates (the Pacific and the Juan de Fuca plates) are constantly spreading apart, causing a steady buildup of pressure beneath the planet's surface. The frequency of earthquakes has recently picked up dramatically as the volcano inflates with increasingly more magma, signaling an eruption could be near, according to researchers at the National Science Foundation's Ocean Observatories Initiative Regional Cabled Array, a facility operated by the University of Washington that monitors the activity of Axial Seamount. 'At the moment, there are a couple hundred earthquakes a day, but that's still a lot less than we saw before the previous eruption,' said William Wilcock, a marine geophysicist and professor at the University of Washington School of Oceanography who studies the volcano. 'I would say it was going to erupt sometime later (this year) or early 2026, but it could be tomorrow, because it's completely unpredictable,' he said. During the volcano's last eruption in April 2015, the team observed about 10,000 small-scale earthquakes in a 24-hour period, and the same can be expected for the next one, Wilcock said. Magma — molten rock beneath Earth's surface — oozed out of Axial Seamount for a month and trailed about 25 miles (40 kilometers) across the seafloor, he added. The magma chamber at the heart of the volcano has also collapsed several times in the past, creating a large crater called a caldera. There, sea life thrives off the mineral-rich gases that exit through hydrothermal vents, which are like underwater hot springs. Streams of hot fluid containing billions of microbes and clumps of waste billow up from cracks in the caldera's surface, creating white plumes called 'snowblowers.' During previous eruptions, the small plants and animals living on the hydrothermal vents were scorched by lava flows, but just three months later, their ecosystem was back and flourishing again, said Debbie Kelley, director of the Regional Cabled Array. 'I think it's one of the biggest discoveries we've made,' said Kelley, a professor of marine geology and geophysics at the University of Washington, in a statement. 'Life thrives in these inhospitable environments, and volcanoes are probably one of the major sources of life in our oceans.' While neighboring marine life such as fish, whales and octopuses may feel the heat and rumble of seismic shifting, they are unlikely to be harmed. And people on land probably won't notice the eruption at all, Kelley told CNN. 'It's not a very explosive event. You won't see the ash clouds above water, anything like that,' she said. 'It's like if you put a mile of seawater on top of Kilauea … you may see some fountaining, but that's it.' In fact, most of the planet's volcanic activity takes place within underwater spreading centers such as the Juan de Fuca Ridge, which experiences multiple, small volcanic eruptions each day, Kelley said. 'The magma's pretty close to the surface. It's about a mile beneath the surface, which is very shallow compared with a lot of land volcanoes, where it may be 8 miles (12.9 kilometers) deep,' Kelley said, adding that the viscosity, or thickness, of the magma can affect how much pressure builds up in the magma chamber. Like a thick tomato sauce cooking on the stove, air bubbles within high-viscosity magma rupture more dramatically than Axial Seamount's thinner, runnier magma. Luckily, the relative mildness of Axial Seamount makes it perfect for close human observation. The next time the volcano erupts, the observatory even plans to publicly livestream the event, which has never been done before, Kelley said. Observing an undersea volcanic eruption is no easy task. Scientists only directly witnessed one in action for the first time on April 29. In the Pacific Ocean, about 1,300 miles (2,092 kilometers) west of Costa Rica, researchers partnering with the Woods Hole Oceanographic Institution, or WHOI, were on a routine submersible dive to collect data on the East Pacific Rise when they noticed the once-vibrant Tica vents were no longer teeming with sea life. Instead, the team found a charred 'tubeworm barbeque,' as WHOI Emeritus Research Scholar Dan Fornari put it. Flashes of orange lava leaked through the seafloor before hardening in the freezing water, indicating an eruption was taking place. 'It's quite a significant development,' Fornari said. 'It's a very understudied environment, because it's hard to reach and because we have to use clever technology to understand it. … At the heart of it, we are watching (the) ways in which this planet gets built, gets constructed by volcanism on the seafloor.' Unexpectedly, close observation of Axial Seamount has revealed the timing of its eruption isn't just about what's bubbling beneath the surface — it also has to do with what's above. All three of the most recent eruptions — in 1998, 2011 and 2015 — have occurred between January and April, the time of year when Earth is moving away from the sun. 'I don't think we fully understand why that is, but it may be related to the (gravitational) forces from the moon influencing the volcano,' Wilcock said. The moon orbits Earth each month, and its gravitational pull moves ocean tides up and down, causing pressure variations on the seafloor. As the volcano's magma chamber reaches critical mass, these pressure changes put more stress on the caldera, the crater of the volcano created by previous eruptions. The pressure of high tide also causes more frequent earthquakes, slowly stressing the chamber to its breaking point, Kelley said.
