Which outcome occurs when continuous subduction reduces mantle viscosity?

💡 Explanation

Deep earthquakes more frequently occur because lower mantle viscosity allows for deeper, faster subduction; this forces brittle crust deeper facilitating seismic events rather than ductile deformation typically seen in hotter, higher viscosity regions; therefore deep quakes increase, rather than other volcanic or crust formation changes.

• Which risk increases when thermohaline circulation weakens substantially due to polar ice melt?
• Which outcome reduces floodplain biodiversity following levee construction?
• Which soil horizon change results when intensified bioturbation exceeds leaching rate?
• Which shift results following slower North Atlantic Deep Water formation?
• Which outcome results when differential weathering weakens coastal rock formations?
• Which mechanism amplifies meandering patterns of jet streams when Arctic sea ice extent decreases significantly?