Mount St Helens : More Than 400 Earthquakes Recorded
A report by the US Geological Survey (USGS) revealed that around 400 earthquakes have been recorded under Mount St Helens since mid-July this year.
- Mount St Helens is a volcanic peak in the Cascade Range of southwestern Washington, United States of America.
- It is part of the larger Pacific Ring of Fire.
- The volcano was formed during four eruptive stages beginning about 275,000 years ago and has been the most active volcano in the Cascade Range during the Holocene.
- Its eruption on May 18, 1980, was one of the greatest volcanic explosions ever recorded in North America.
Pacific Ring of Fire:
- It also known as the Circum-Pacific Beltis a path along the Pacific Ocean characterized by active volcanoes and frequent earthquakes.
- Its length is approximately 40,000 kilometres (24,900 miles).
- It traces boundaries between several tectonic plates—including the Pacific, Juan de Fuca, Cocos, Indian-Australian, Nazca, North American, and Philippine Plates.
