US GEOLOGICAL SURVEY / SCIENCE PHOTO LIBRARY US GEOLOGICAL SURVEY / SCIENCE PHOTO LIBRARY
Pacific Ring of Fire. Computer graphic of the globe showing earthquake zones, known as the Ring of Fire, around the rim of the Pacific Ocean. The depth of the ocean & the elevation of the land is colour-coded using the metre scale at far right. The epicentres of earthquakes with a magnitude on the Richter scale greater than or equal to 5 are marked as red dots. The boundaries between the different plates in the Earth's crust are shown as yellow lines. The earthquake epicentres are mainly around the rim of the Pacific and are caused by the movement of plates in the Earth's crust under the ocean moving against those under the land. Image of earthquakes recorded since 1980.
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