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 outcome occurs when seismic waves encounter unconsolidated sediments overlying bedrock during an earthquake?
• Which mechanism creates increased salinity near desert stream outflows?
• Which process drives magma differentiation at subduction zones?
• Which outcome occurs when freshwater inflow reduces surface density within an ocean gyre?
• Which downslope movement results when permafrost thaws and the active layer loses shear strength?
• When continents interrupt ocean gyres, which outcome results?