A massive volcano in America has been predicted to erupt in 2026

Just off the coast of Oregon, there’s a massive underwater volcano known as the Axial Seamount. Scientists predicted that it will erupt by the end of 2025. But it didn’t. Now they are saying the Seamount will erupt in 2026 instead – even though there is no reliable way to predict a volcanic eruption, especially not months or years in advance. (Picture: Interactive Oceans)

Through a combined analysis of seismic and seafloor inflation data around the Axial Seamount, researchers could offer a way to forecast future eruptions, says geophysicist Professor William Chadwick of Oregon State University’s Hatfield Marine Science Center in Newport. And he says that according his new analysis an eruption could happen sometime in 2026. He reported these findings on December 16 at the American Geophysical Union’s annual meeting, a follow-up of sorts to his prediction at last year’s meeting that Axial would erupt in 2025. (Picture: Google Maps)

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He said: ‘We are now about 10cm higher than the 2015 inflation threshold, with perhaps as much as 20cm more to go. But the slower the rate of inflation, the longer it will take to get there. It seems like every time we try to estimate when the volcano might get there, the rate of inflation changes, making our forecast incorrect. This has happened over and over since the 2015 eruption, and shows the obvious limitations of trying to make long-term forecasts based on simple pattern recognition: the pattern could change. At the current rate of inflation, we won’t get to that higher inflation threshold until mid-to-late 2026. We’ll wait until the end of the year to revise our forecast (who knows, it could still erupt before the end of the year!), but it’s looking like we might have to add another year to our forecast window, based on the latest data.’ (Picture: NOAA NeMo Observatory)

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So, why did the volcano not erupt in 2025?

Predicting an eruption weeks or even months in advance is almost impossible. But the reason anybody felt able to make any kind of statement about Axial Seamount’s potentially imminent eruption was simple – it is a huge, active volcano and we have way more information about it than most others out there. It is constantly monitored by sensors that provide real-time data on things like ocean floor movement, local seismic activity, and how much the surface of the volcano is growing over time. And a measure taken in 2024 led Professor Chadwick to take particular notice, because it was then that Axial’s inflation surpassed the levels it reached just before its last eruption back in 2015. (Picture: UW)

Professor at the University of Washington School of Oceanography said back in April: ‘Over time, the volcano inflates due to the buildup of magma beneath the surface. Some researchers have hypothesized that the amount of inflation can predict when the volcano will erupt. If they’re correct it’s very exciting for us, because it has already inflated to the level that it reached before the last three eruptions. That means it could really erupt any day now, if the hypothesis is correct.’ (Picture: Nature)

The researchers did manage to predict the 2015 eruption too, and as magma refilled the reservoir, the seafloor puffed up, and by late 2024 Axial had hit about 95 percent of the inflation seen before 2015 – hence the 2025 prediction. With each eruption, the crust around the magma body likely stiffens and compresses, so Axial has to inflate a bit more each cycle. That makes the seamount a clean test of how predictable repeat eruptions can be. (Picture: University of Washington)

The Axial Seamount sits roughly 300 miles off the Oregon coast and nearly a mile underwater, on the Juan de Fuca Ridge. The seafloor plates pull apart and magma leaks through the gap. It’s the most active known submarine volcano in the Northeast Pacific, with eruptions in 1998, 2011, and 2015. (Picture: Schmidt Ocean Institute)

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A massive volcano in America has been predicted to erupt in 2026

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So, why did the volcano not erupt in 2025?

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