An undersea volcano situated 300 miles (480 km) off the coast of Oregon is thought to be erupting after signs of magma were spotted near its deep sea vent. Geologists predicted the volcano, called Axial Seamount, would erupt this year during a public lecture in September. And for more than a week the region has experienced thousands of tiny earthquakes – a sign that magma is moving towards the surface.

The seafloor has also reportedly dropped by almost 8ft (2.4 metres), additionally said to be a sign of magma being withdrawn from a reservoir beneath the summit. It is dubbed Axial Seamount due its location along the axis of an underwater mountain ridge. The earthquakes were first recorded by William Wilcock from the University of Washington using instrumentation from the NSF-funded Ocean Observatories Initiative. And the forecast was made by geologists Bill Chadwick of Oregon State University and Scott Nooner of the University of North Carolina Wilmington during a lecture last year, followed by a blog post. MORE