00:00Undersea volcano awakens. Scientists monitor hidden tremors beneath Pacific waves.
00:06An undersea volcano near the Pacific coast is shaking beneath the waves.
00:11Off the western United States, dark ocean water hides ridges, vents, lava flows, and sensors on the seafloor.
00:19Scientists track the volcano with seafloor instruments that record earthquakes, swelling ground, pressure changes, and underwater sound.
00:27The volcano sits along an active ocean ridge, where Earth's crust pulls apart and magma rises from below.
00:35Small earthquakes can arrive in swarms when magma pushes through cracks beneath the seafloor.
00:41The seafloor can inflate like a slow balloon as molten rock gathers below the volcanic summit.
00:47Researchers watch those changes because similar signals appeared before earlier underwater eruptions in the same region.
00:53An eruption would likely stay far below the surface, where lava meets cold seawater and forms dark rock.
01:01Deep sea vents could change quickly as heat, chemicals, microbes, crabs, worms, and fish react to new lava.
01:08Ships, satellites, and underwater instruments help scientists follow the event without standing near the hidden crater.
01:14The danger to coastal towns remains low, but the science beneath the ocean looks dramatic.
01:21The warning is simple.
01:22A quiet sea surface can hide a restless volcano below.
01:26When the seafloor starts to shake, the deep ocean becomes a live geology lab.
Comments