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Richter scale
A way to measure information collected by seismographs to determine the relative strength of an earthquake.
Glossary
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Rift valley
A long, thin valley created by the moving apart of the continental plates, present in east Africa, stretching over 4,000 miles (6,437 km) from Jordan in southwest Asia to Mozambique in southern Africa.
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Rift Valley fever
Rift Valley fever is a viral disease affecting domesticated animals and humans. Rift Valley fever transmission may happen by a mosquito and other biting insects.
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Right of return, Palestinian
The Palestinian Arab principle that refugees displaced from Israel and the Occupied Territories in the 1948 and 1967 wars be allowed to return to the region.
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Ring of fire
The chain of volcanoes that lines the pacific rim. Located in the Pacific Ocean zone, where there are many volcanoes and frequent earthquakes.