Mount St Helens. Satellite image of Mount St Helens (MSH), Washington, USA. This prominent volcano is found in the Cascade Range, which stretches from British Columbia, Canada to Northern California, USA. MSH erupted on 18 May 1980, causing the upper 400 metres of the mountain to collapse, leaving behind a crater. MSH became active again after September 2004 and a new lava dome has been observed within the crater (brown circle, centre right). Image taken by the Ikonos satellite on 9 March 2005.
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