The most deadly volcano in America revived

Research by US geological experts points to St. Helen, the most active volcano in the northwest Pacific, is capable of erupting after a decade of oversleeping.

According to The Guardian, since March this year, scientists discovered more than 130 small-scale earthquakes below the volcano St. Helens with up to 40 games per week.

St. Volcano Helens is known for the most deadly eruption in American history in 1980. The ash from the eruption spreads nearly 1,600km, resulting in 57 deaths. The volcano continued to awaken in 2004, spewing out a ash column over 9,000m high. Its activity lasted until January 2008 and 5 months later, scientists concluded St. Volcano. Helens went to sleep.

1980 eruption of St. VolcanoHelens killed 57 people.(Photo: AP).

However, earlier this year, the volcano showed signs of activity again. Beginning March 14, scientists at the Cascades Volcanic Observatory at the US Geological Survey (USGS) recorded low-intensity earthquakes at depths of 1.9 to 6.4 km. under the volcano St. Helens. In just 8 weeks, they discovered more than 130 earthquakes, mostly in the 0.5 richter scale. The strongest earthquake in recent times is 1.3% richter.

Earthquakes are becoming more and more popular, but aftershocks are not strong enough to see clearly from the ground."When the volcano raged, most of the activity took place deep beneath our feet , " Wired quoted Erik Klemetti, associate professor of Geosciences at Denison, Ohio, USA.

Although the mountain seems to be asleep, the magma line (the slate) inside is moving upward. Scientists predict rising magma will put pressure on the surrounding crust, magma flow flows through cracks and emits small earthquakes. According to USGS, magmatic accumulation activities will probably last for many years before a real eruption takes place.