Eurasian plate
Tectonic plate covering most of Eurasia and adjacent oceanic crust.
The Eurasian plate covers most of the Eurasian landmass, which includes the traditional continents of Asia and Europe. However, it does not include the Arabian Peninsula, the Indian subcontinent, or the region east of the Chersky Range in eastern Siberia. The plate also extends into the ocean, reaching the Mid-Atlantic Ridge to the west and the Gakkel Ridge to the north.
At its western edge, the Eurasian plate meets the North American and African plates at the Azores triple junction, a seismically active area. From there, the boundary runs north along the Mid-Atlantic Ridge toward Iceland. These ridges form where plates move apart, but because they lie deep underwater, they are difficult to study—scientists know less about them than about the planets in our solar system.
Another triple junction exists where the Eurasian plate meets the Arabian plate. In this region, the Anatolian sub-plate is being squeezed by the collision of the Eurasian and Arabian plates along the East Anatolian Fault Zone. The boundary between the North American and Eurasian plates near Japan is considered "shifty," with different maps based on recent tectonics, seismicity, and earthquake focal mechanisms. The simplest model draws the boundary from the Nansen Ridge through a broad deformation zone in North Asia, then to the Sea of Okhotsk, and south through Sakhalin Island and Hokkaido to a triple junction in the Japan Trench. However, newer research has challenged this simple view. In the 1970s, Japan was thought to sit on the Eurasian plate at a quadruple junction with the North American plate, whose eastern boundary was then drawn through southern Hokkaido.
All volcanic eruptions in Iceland—including the 1973 eruption of Eldfell, the 1783 eruption of Laki, and the 2010 eruption of Eyjafjallajökull—result from the North American and Eurasian plates moving apart at a divergent boundary. The convergent boundary between the Eurasian and Indian plates created the Himalayas. In Central Asia, the interaction between these two plates dominates the region's geodynamics, and many sub-plates or crustal blocks have been identified, forming the Central Asian and East Asian transit zones.
- type
- Tectonic plate
- area_includes
- Most of Eurasia, oceanic crust to Mid-Atlantic and Gakkel Ridges
- key_boundaries
- Triple junctions with North American, African, and Arabian plates
- notable_features
- Himalayas (convergent boundary with Indian plate), Iceland volcanism (divergent boundary with North American plate)
- associated_sub_plates
- Anatolian sub-plate, Sunda plate, Aegean Sea plate
Lore & Background
The western edge of the Eurasian plate is a triple junction plate boundary with the North American plate and African plate at the seismically active Azores triple junction, extending northward along the Mid-Atlantic Ridge towards Iceland. Ridges like the Mid-Atlantic Ridge form at divergent plate boundaries, located deep underwater and very difficult to study; scientists know less about ocean ridges than they do the planets of the Solar System. Another triple junction exists where the Eurasian plate meets the Arabian plate, and the Anatolian sub-plate is currently being squeezed by the collision of the Eurasian plate with the Arabian plate in the East Anatolian Fault Zone.
Reader's Guide
The Eurasian plate is significant for its role in major geological processes, including the formation of the Himalayas through its convergent boundary with the Indian plate, and volcanic eruptions in Iceland caused by its divergent boundary with the North American plate. Its boundaries are complex and in some areas disputed: the boundary with the North American plate in the region around Japan has been described as 'shifty,' with different maps based on recent tectonics, seismicity, and earthquake focal mechanism. During the 1970s, Japan was thought to be located on the Eurasian plate at a quadruple junction with the North American plate. The geodynamics of Central Asia is dominated by the interaction between the Eurasian plate and the Indian plate, where many sub-plates or crust blocks have been recognized, forming the Central Asian and East Asian transit zones. The plate's boundaries include triple junctions with the African and Arabian plates, and its oceanic crust extends to the Mid-Atlantic and Gakkel Ridges.
Did You Know?
- The Eurasian plate includes most of Eurasia but excludes the Arabian Peninsula, the Indian subcontinent, and the area east of the Chersky Range.
- All volcanic eruptions in Iceland, such as the 1973 eruption of Eldfell, are caused by the Eurasian and North American plates moving apart at a divergent boundary.
- The boundary between the Eurasian and North American plates near Japan has been described as 'shifty' and is mapped differently based on recent tectonics and seismicity.
- Scientists know less about ocean ridges like the Mid-Atlantic Ridge than they do the planets of the Solar System.
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