SEATTLE, Washington, Oct 4 (AFP) - Mount St Helens spewed out more steam on Monday after new seismic tremors that led some experts to warn the volcano could explode at any time.
Catherine Puckett of the US Geological Survey (USGS) told AFP the eruption was similar to one on Friday which sent a huge cloud of steam and some ash into the air.
The volcano killed 57 people during a major eruption in 1980.