Lava-filled cracks may encourage quakes

In 2002, residents of the eastern Congo suffered a one-two punch–a volcanic eruption followed months later by a destructive earthquake. Now researchers say the events might have been related, exposing a new source of seismic hazards in rift zones like East Africa. Learn more in my podcast for Scientific American.

Both the eruption and the earthquake affected communities around Lake Kivu in the Democratic Republic of Congo. (Credit: MONUSCO via Flickr)