Which seismic consequence primarily occurs when the lower plate melts during subduction under the overriding plate?

💡 Explanation

When lower plate material melts during subduction, magma production increases because the addition of volatiles lowers the melting point of the mantle wedge, leading to increased volumes available for volcanism. Therefore increased magma production results, rather than less frequent earthquakes, crustal uplift, or mantle convection, which relate to different tectonic mechanisms.

• Which mechanism causes deflection of ocean currents due to Earth's rotation, primarily affecting their direction?
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• Which crustal deformation mechanism results from the isostatic rebound after removal of ice sheets after subduction stops?
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