Chile and central Africa have both seen large earthquakes over the last few days, only weeks after scientists said Mount St Helens was starting to rumble again. However, there is no reason to believe that any of these events are connected, say scientists.
A magnitude 4.5 quake hit Rwanda and the Democratic Republic of the Congo on Sunday, killing at least 39 people and injuring countless others. This region of Africa is actually quite prone to seismic activity, but it has been quiet for the past few years. A magnitude 6.8 quake struck in December 2005.
Chile also saw a large quake, a magnitude 6.3 one that struck on Monday. Fortunately no casualties or damage have been reported, although there were several landslides.