Ring of Fire is a long chain of volcanoes and other tectonically active structures surrounding the Pacific Ocean.


There are more than 450 active and dormant volcanoes located within the Ring of Fire. Many of these volcanoes were created through the tectonic process of subduction whereby dense ocean plates collide with and slide under lighter continental plates. The material from the ocean floor melts as it enters the Earth’s interior and then rises to the nearby surface as magma. Noteworthy volcanoes that dot the Ring of Fire include Mount St. Helens in the USA, Mount Fuji in Japan and Mount Pinatubo in the Philippines. Since 1850, approximately 90% of the 16 most powerful volcanic eruptions on Earth have occurred within the Pacific Ring of Fire.




I would day US needs to be alert

[link to earthsky.org]