GEOLOGY

EARTH SCIENCE

EARTHQUAKES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following observations may indicate a forthcoming destrictive earthquake?
A
an increase in the frequency of smaller earthquakes in the region
B
rapid tilting of the ground
C
rapid changes in water levels in wells
D
all of these
Explanation: 

Detailed explanation-1: -Signs that an earthquakes may occur include foreshocks, ground tilting, water levels in wells, and the relative arrival times of P-and S-waves.

Detailed explanation-2: -Notable precursors to an eruption might include: An increase in the frequency and intensity of felt earthquakes. Noticeable steaming or fumarolic activity and new or enlarged areas of hot ground. Subtle swelling of the ground surface. Small changes in heat flow.

Detailed explanation-3: -Severe earthquakes destroy power and telephone lines, gas, sewer, or water mains, which, in turn, may set off fires and/or hinder firefighting or rescue efforts. Earthquakes also may cause buildings and bridges to collapse.

Detailed explanation-4: -Detailed Solution. The correct answer is Surface waves.

There is 1 question to complete.