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Examples of intraplate earthquakes include those in Mineral, Virginia, in 2011 (estimated magnitude 5.8), Newcastle, New South Wales in 1989, New Madrid in 1811 and 1812 (estimated magnitude as high as 8.6), [6] the Boston (Cape Ann) earthquake of 1755 (estimated magnitude 6.0 to 6.3), earthquakes felt in New York City in 1737 and 1884 (both ...
Intraplate volcanism is volcanism that takes place away from the margins of tectonic plates. Most volcanic activity takes place on plate margins, and there is broad consensus among geologists that this activity is explained well by the theory of plate tectonics .
The tectonics of the Petermann Orogeny are extremely unusual, as it occurred in an intraplate setting in the centre of the Australian continental block. Several theories about the causes and dynamics of the orogen are currently under investigation, including;
The New Madrid seismic zone (NMSZ), sometimes called the New Madrid fault line (or fault zone or fault system), is a major seismic zone and a prolific source of intraplate earthquakes (earthquakes within a tectonic plate) in the Southern and Midwestern United States, stretching to the southwest from New Madrid, Missouri.
The Coromandel Volcanic Zone (CVZ) is an extinct intraplate volcanic arc stretching from Great Barrier Island in the north, through the Coromandel Peninsula, to the Kaimai Range in the south. The area of transition between it and the newer and still active TaupÅ Volcanic Zone is now usually separated and is called the Tauranga Volcanic Centre .
Intraplate deformation is the folding, breaking, or flow of the Earth's crust within plates instead of at their margins. This process usually occurs in areas with especially weak crust and upper mantle , such as the Tibetan Plateau (Figure 1).
The annotated diagram of the intraplate hotspot model before 3400 Ma, forming the oceanic plateaus. Modified from Jayananda et al, (2018). [2] Before 3400 Ma, the magma upwelling from the mantle led to the intraplate hotspot setting. [5] The upwelling magma formed the oceanic plateaus with komatiites and komatiitic basalts in the oceanic crust ...
The Mesozoic structures underneath the North Sea can be seen as a failed rift system. [2] After initial crustal extension and the formation of rift basins during the Triassic and Jurassic periods, [1]: [70] the extension concentrated on the other side of the British Isles, which would create the northern Atlantic Ocean.