While predicting the exact timing is tricky, scientists say said an eruption could occur later this year or even tomorrow. Deep below the Pacific, a restless seafloor volcano off Oregon is showing signs it may soon stir again. Axial Seamount, a submarine volcano located nearly a mile beneath the ocean surface, is flexing its geologic muscles. Perched on a hot spot along the Juan de Fuca Ridge, where the Pacific and Juan de Fuca tectonic plates are slowly pulling apart, the volcano is steadily inflating with magma, increasing the frequency of small earthquakes. Researchers with the National Science Foundation’s Ocean...