Mount St Helens. Satellite image of the summit of the Mount St Helens volcano,in Washington State,USA. The summit crater (centre,2 kilometres wide and 640 metres deep) was formed during a massive volcanic eruption on 18 May 1980,following months of volcanic activity. The bulging northern face of the volcano collapsed and a massive pyroclastic flow erupted northwards (towards top),leaving a massive gap in the crater that formed. The volcano was reduced in height by 400 metres,hundreds of square kilometres of forest were destroyed and 57 people died. A post-eruption lava dome (centre) formed in the crater. Image taken by the Ikonos satellite on 13 September 2003 | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Geoeye |
Taille de l’image : | 3000 px × 3000 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |