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Devastation
in the Congo
On January 17, 2002 Mount Nyiragongo erupted near the
Congolese town of Goma. So far the eruption has displaced upwards of 300,000
people and killed at least 40 people.
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Lava flows sourced from Mt. Nyiragongo flowed through
the middle of the city of Goma and into Lake Kivu.
Photo from BBC News
With many homes destroyed, and other lives disrupted,
upwards of 300,000 people have been displaced and are in need of assistance.
Photo from BBC News
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Mount Nyiragongo is a shield volcano located in the East African Rift
System, a region where tectonic forces are pulling the African continent
apart. Because of the tension, the cool brittle crust frequently breaks
(sometimes violently) causing earthquakes. Because these are areas where
the crust has been thinned by streaching and breaking, it is also easy
for magma from deeper in the earth to make it to the surface. The lava
that erupts from shield volcanoes is hot and fluid (runny) so the lava
moves over the surface much like water would; flowing downhill and always
seeking lower spots on the land. In 1977 a lava lake at the top of Mt.
Nyiragongo drained suddenly, releasing massive amounts of lava that flowed
downhill at speeds of 65 km/h (40 mph), one of the fastest flows ever
observed.
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Graphic courtesy of the IRIS Consortium.
This is a map showing the major earthquakes in the East African Rift
System between 1964 and 1998. Each white arrow represents one earthquake
and indicates the direction of strain in the fault system, clearly demonstrating
the tension this area is undergoing. The location of Nyiragongo is marked
with the red circle, clearly located within a cluster of recent earthquake
activity.
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©2002, University of Wisconsin, Board of Regents.
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