"A massive underwater volcano off the coast of Oregon has been rocked by hundreds of earthquakes a day, a sign that it could soon erupt.
Axial Seamount, the most active volcano in the Pacific Northwest, is nestled about 300 miles off the coastline and nearly a mile beneath the ocean's surface.
Scientists have detected around 100 earthquakes per day, with recent peaks hitting 300 a day. Seismic activity is a sign magma is moving up through cracks in the volcano.
The quakes are small, typically magnitude 1 or 2, and too far offshore for humans to feel, but they're frequent." -(From the YouTube page).