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Tectonic Plates

Earth's lithosphere is divided into tectonic plates that float on the asthenosphere. Most earthquakes occur along plate boundaries.

African

AF Major Plate

Large plate covering Africa and part of the Atlantic Ocean. Diverges from the South American Plate …

61,300,000.0 km²

Antarctic

AN Major Plate

Plate underlying Antarctica and surrounding ocean. Surrounded by mid-ocean ridges.

60,900,000.0 km²

Arabian

AR Minor Plate

Drives into Eurasian plate causing earthquakes in Iran, Turkey, and the Middle East.

5,000,000.0 km²

Caribbean

CA Minor Plate

Small plate between North and South American plates. Source of Caribbean earthquakes.

3,300,000.0 km²

Cocos

CO Minor Plate

Oceanic plate subducting under Central America and Mexico, causing frequent large earthquakes.

2,900,000.0 km²

Eurasian

EU Major Plate

Covers Europe and most of Asia. Collides with Indian Plate forming the Himalayas.

67,800,000.0 km²

Indo-Australian

AU Major Plate

Sometimes divided into Indian and Australian plates. Drives into Eurasian plate.

58,900,000.0 km²

Juan de Fuca

JF Minor Plate

Subducting under Pacific Northwest, responsible for Cascadia megathrust earthquake risk.

250,000.0 km²

Nazca

NZ Minor Plate

Oceanic plate subducting under South America, generating the world's most powerful earthquakes.

15,600,000.0 km²

North American

NA Major Plate

Covers North America, Greenland, and part of the North Atlantic.

75,900,000.0 km²

Pacific

PA Major Plate

Largest tectonic plate, almost entirely under the Pacific Ocean. The Ring of Fire follows its edges.

103,300,000.0 km²

Philippine Sea

PS Minor Plate

Complex plate driving seismicity across Japan, Philippines, and Taiwan.

5,500,000.0 km²

Scotia

SC Minor Plate

Small plate near southern tip of South America.

1,600,000.0 km²

Somali

SO Minor Plate

Rifting from African Plate along East African Rift System.

16,700,000.0 km²

South American

SA Major Plate

Covers South America and part of South Atlantic. Subduction under Nazca Plate drives Andes earthqua…

43,600,000.0 km²