Mariana Plate

Map of the Mariana Plate (as "Mariannes") and its neighbouring plates (in French)

Cross section across the Mariana Plate

The Mariana Plate is a small tectonic plate located west of the Mariana Trench and forms the basement of the Mariana Islands. It is separated from the Philippine Sea Plate by a long divergent boundary with numerous transform fault offsets. The boundary between the Mariana and the Pacific Plate to the east is a subduction zone with the Pacific Plate subducting beneath the Mariana. The Mariana Trench forms the southeastern boundary and the Izu-Ogasawara Trench the northeastern.^[1]

The Mariana Islands earthquake of October 31, 2007 was a deep earthquake. It had a magnitude of 7.4 and occurred at 21.980° N. Lat. and 142.685° E. Long. at a depth of 261 km.^[2]

References

1. ^ Bird, P. (2003). "An updated digital model of plate boundaries". Geochemistry, Geophysics, Geosystems 4 (3): 1027. doi:10.1029/2001GC000252. http://peterbird.name/publications/2003_PB2002/2003_PB2002.htm. 
2. ^ "M7.2 Northern Mariana Islands Earthquake of 31 October 2007". USGS. ftp://hazards.cr.usgs.gov/maps/sigeqs/20071031/20071031.pdf. Retrieved 2009-01-08. 

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