Question

which one of the following is true regarding tsunamis?they travel as deep - water waves at speeds greater than surface seismic waves but slower than s waves.they occur in the open ocean, wavelengths are many miles or kilometers and wave heights are only a few feet.their wave heights decrease and wavelengths increase as they move into shallower water.they are started by fault - induced, horizontal shifts in the seafloor that suddenly propel great masses of water in opposite directions.question 4 (1 point)major earthquakes are often followed by somewhat smaller events known as ________.tremorsforeshocksaftershocks

Explanation:

• Tsunami question:
• Tsunamis in the open ocean have long wavelengths (many miles or kilometers) and relatively small wave heights (only a few feet). As they approach shore (shallow water), wave heights increase and wavelengths decrease. They are started by vertical (not horizontal) shifts in the seafloor. Regarding wave speeds, tsunamis (as deep - water waves) are faster than surface seismic waves but slower than P - waves (not S - waves).
• Earthquake after - events question:
• Foreshocks occur before a major earthquake. Tremors is a more general term. Aftershocks are the smaller events that follow a major earthquake.

Answer:

• Tsunami question: They occur in the open ocean, wavelengths are many miles or kilometers and wave heights are only a few feet.
• Earthquake question: aftershocks