GEOLOGY

EARTH SCIENCE

NATURAL HAZARDS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A huge undersea tsunami off the Alaskan coastline could produce what natural hazard? Choose the best statement.
A
There are no undersea tsunamis. Earthquakes do occur undersea.
B
There are no undersea tsunamis. Hurricanes occur undersea.
C
Hurricanes occur on land.
D
Tornadoes occur undersea.
Explanation: 

Detailed explanation-1: -Tsunamis are a special type of sea-borne flood. Storm surges are an abnormal rise in sea water level associated with hurricanes and other storms at sea. Surges result from strong on-shore winds and/or intense low pressure cells and ocean storms.

Detailed explanation-2: -By far, the most destructive tsunamis are generated from large, shallow earthquakes with an epicenter or fault line near or on the ocean floor. These usually occur in regions of the earth characterized by tectonic subduction along tectonic plate boundaries.

Detailed explanation-3: -A tsunami is a series of enormous waves created by an underwater disturbance usually associated with earthquakes occurring below or near the ocean. Volcanic eruptions, submarine landslides, and coastal rock falls can also generate a tsunami, as can a large asteroid impacting the ocean.

Detailed explanation-4: -If the earthquake occurs in the ocean, it can push up powerful waves, known as tsunamis. The sudden upward or downward movement of the seafloor during an earthquake creates large tsunami waves, similar to a child splashing in the bathtub.

There is 1 question to complete.