be seen in the forearc region deformation signatures. Seismicity The intense interaction between the overriding and underthrusting plates in the forearc regions have shown to evolve strong coupling mechanisms which result in megathrust earthquakes such as the Tohoku-oki earthquake which occurred off the Pacific coast of Northeast Japan (Tian and Liu. 2013). These mega thrust earthquakes may be correlated with low values of heat flow generally associated with forearc regions. Geothermal data shows a heat flow of ~30–40 mW/m2, which indicates cold, strong mantle. Examples One good example is the Mariana forearc, where scientists have done extensive research. In this setting there is an erosive margin and forearc slope which consists of 2 km high and 30 km diameter serpentine- mud volcanoes. The erosive properties of these volcanoes are consistent with the metamorphic grades (blueschists) expected for this region in the forearc. There is evidence from geothermal data and models which show the slab-mantle interface, levels of friction and the cool oceanic lithosphere at the trench. Other good examples are: Central Andean Forearc Banda Forearc Savu-Wetar Forearc Luzon arc-forearc Tohoku Forearc Between Western Cordillera and Peru-Chile Trench See also Back-arc region References Einsele, Gerhard (2000) Sedimentary Basins : Evolution, Facies, and Sediment Budget 2nd ed., Ch. 12, Springer USGS definition Forearc Basin Architecture, abstract Plate tectonics Sedimentology Subduction