gunung

2025/” title=”Underwater volcano off Oregon coast on the verge of eruption in 2025″>Axial Seamount: Europe’s Most Active Underwater Volcano Primed for Eruption

Beneath the Pacific Ocean, around 470 kilometers off the coast of Oregon, one of the world’s most active underwater volcanoes is swelling with magma. Known as Axial Seamount, this volcanic giant is expected to erupt before the end of 2025, according to scientists monitoring its unique vulcanic rhythm for decades.

Dr. Bill Chadwick, a geophysicist at Oregon State University, likens the situation to a pressure cooker nearing its limit. "Based on the current pattern, and the assumption that Axial will erupt once it reaches its inflation threshold as it did in 2015, the best estimate for an eruption is between now and the end of 2025," Chadwick said at the American Geophysical Union’s 2024 annual meeting, as reported by ZME Science.

Axial: A Unique Case

Predicting volcanic eruptions is no exact science, but Axial Seamount presents a special case. This seabed volcano, located at the Juan de Fuca Ridge, erupts with remarkable regularity. Previous eruptions occurred in 1998, 2011, and 2015, all following a clear pattern of seabed inflation as magma gathers, increased seismic activity, and finally, an eruption.

This consistency makes Axial an ideal laboratory for studying volcanic behavior. A network of sensors has documented every rumble and bulge of the volcano for over a decade. By the end of 2023, scientists noticed the volcano’s inflation rate had doubled. By mid-2024, Axial’s seismic activity had spiked to over 500 tremors per day. "This can’t go on forever," Chadwick warns, indicating an imminent eruption.

Dr. Mark Zumberge of Scripps Institution of Oceanography praises the extraordinary monitoring network surrounding Axial. "It’s the most instrumented underwater volcano on the planet," he says. This network comprises seafloor pressure sensors, autonomous underwater vehicles (AUVs), and remotely operated vehicles (ROVs), providing unparalleled insights into the volcano’s behavior.

Previously, scientists could only glimpse the magma reservoir below the surface, lacking the resolution for detailed mapping. Now, using advanced seismic techniques like full waveform inversion (FWI), researchers have generated high-resolution images beneath the surface.

These images reveal a vast reservoir beneath Axial’s peak, with up to 37% melt fraction, nearing the mobilization threshold for magma. A conduit below connects this to the Earth’s interior, with 4-11% melt fraction. West of the peak, scientists found a smaller reservoir linked to the main one by a thin channel. On the east side, a sluggish conduit connects the magma chamber to the eruption scars.

This asymmetrical structure concentrates most activity beneath the eastern caldera wall, explaining why recent eruptions primarily occurred on Axial’s eastern flank.

Eruption Could Trigger Tsunami

While underwater volcanoes like Axial rarely threaten human lives, their eruptions can shake ecosystems and trigger tsunamis. The 2022 eruption of the Hunga Tonga underwater volcano, for instance, caused $90 million in damages and challenged scientists’ understanding of its impacts.

At Axial, scientists plan to observe the impending eruption. Dr. Rebecca Carey, a vulcanologist from the University of Tasmania, sees this as a unique opportunity. "Catching an eruption in progress would provide a snapshot of its impact on the nearby hydrothermal systems and biological communities," she told Science News.

Hydrothermal vents, teeming with life, hold clues about how ecosystems respond to extreme events. Moreover, each eruption refines prediction techniques. Artificial intelligence now aids in analyzing seismic data patterns, potentially enabling eruption forecasts within hours.

Chadwick muses, "Will early warning seismicity detection work?" If successful, it could revolutionize global volcanic monitoring. Findings also shed light on plate tectonics and seafloor formation.

Axial Seamount’s unique location, at the nexus of the Juan de Fuca Ridge and Cobb Hotspot, makes it an ideal study of seafloor magma supply. Research here contributes to understanding seafloor growth.

A Blue Print for the Future

The forthcoming Axial Seamount eruption promises invaluable lessons. The 2015 eruption, which spewed 156 million cubic meters of lava, provided rich data that guided the creation of detailed seabed maps now used to track the volcano’s activity.

Yet, predictions come with caution. Michael Poland of the U.S. Geological Survey warns, "There’s always a risk that the volcano will behave in ways we haven’t seen before and do something unexpected."

The challenge lies in translating these patterns into universal volcanic principles, useful for less predictable volcanoes worldwide. As Axial readies its next performance, scientists around the globe watch and wait, eager to learn from its fiery lesson.