That brings the total to 43,454 undersea mountains, almost doubling the number we knew about.
An underwater volcanic eruption near the Pacific island of Tonga is the largest ever recorded by modern instruments, surpassing mid-century atomic bomb tests.
Mauna Kea is classified as a dormant shield volcano. An U.S. team has found evidence that it has experienced over 1 million deep, long-period earthquakes over the past 19 years.
In 2018, a large number of seismic alerts had been detected everywhere. They created a weird buzzing sound. Now the mysterious hum is identified as rumblings of a magma-filled reservoir deep under the Indian ocean where the new volcano is forming.
Hidden below the waves off the east coast of Australia, scientists have discovered a 'lost world' of epic volcanic peaks buried under the Tasman Sea, never before seen with human eyes.
