Which statement about hazard coupling near subduction zones is accurate?

• A. Hazard coupling is irrelevant
• B. Megathrust earthquakes never generate tsunamis
• C. Megathrust earthquakes can cause tsunamis and volcanic arcs can produce eruptions
• D. Subduction zones eliminate hazards

Answer: (C)

Hazard coupling in subduction zones means that different kinds of hazards are linked in the same tectonic setting, so one event can bring multiple threats. In these zones, a megathrust earthquake on the plate boundary can abruptly move large blocks of the seafloor, creating tsunami waves that threaten coastal areas. At the same time, the same subduction process feeds a volcanic arc, where eruptions can occur and pose volcanic hazards. Because both large earthquakes and volcanic activity are common in these regions, it’s accurate to say that megathrust earthquakes can cause tsunamis and volcanic arcs can produce eruptions. The other statements ignore the real, interconnected nature of hazards in subduction zones.