
Charles Darwin was among the first people to suggest a link between large earthquakes and increased volcanic activity. In his records, he notes that a large earthquake off Chile's coastline in February 1835 appeared to resurrect previously inactive volcanoes, and cause active ones to increase their eruption rates.
Last year, Pyle and his colleagues confirmed that this was a real effect in Chile, showing that increases in volcanic activity have occurred following other large earthquakes along its coastline.
In particular, they found that after a magnitude 8.3 in 1906 and a magnitude 9.5 earthquake in 1960, there were three or four more volcanic eruptions within about 500 kilometres of the epicentre in the following year than would normally be expected.