Eeps week 4 P.2

Which of the following is not a way to improve a building's resistance to earthquakes?

Match its period to seismic waves at that location.

________ occurs when a building's period matches period of passing seismic waves.

Resonance

The intensity of an earthquake is influenced by all but which of the following?

The current air pressure

A tall office building built on a foundation designed to slide or roll with an earthquake is an example of using ________ to reduce earthquake-induced damage.

base isolation

The acceleration due to gravity is 9.8 meters per second squared (32 feet per second squared), which is referred to as 1.0 g and is used as a comparative unit of measure. Earthquake accelerations have never been measured in excess of 1.0 g.

false

Earthquake-induced ground motions cause buildings to sway at certain periods. In general, the taller the structure, the ________ the period.

longer

The New Madrid earthquakes are apparently related to an old buried

rift zone

Usually, the biggest concern in designing buildings to withstand large earthquakes is the ________ components of movement.

sideways push from the horizontal

The frequency of a wave is ________.

the number of waves passing a given point per unit of time

Aftershocks of the 1811-12 New Madrid, Missouri, earthquakes are still occurring today

true

For magnitudes above about 6, the bigger earthquake magnitude means that more people in a larger area and for a longer time will experience the intense shaking.

true

High-frequency P and S waves will have their vibrations amplified by short buildings.

true

Low-frequency surface waves will be amplified in tall buildings with low frequencies of vibration.

true

Pumping fluids into Earth has been found to sometimes trigger small earthquakes (magnitudes < 5).

true

The largest moment magnitudes measured to date are from earthquakes that occurred in subduction zones

true

The moment magnitude is more accurate than the classical Richter scale because it is tied directly to physical parameters such as fault-rupture area, fault slip, and energy release, and because other earthquake scales use indirect measures such as how much a seismograph needle moves

true

The types of rock or sediment on which a structure's foundation sits are of paramount importance with respect to whether the structure will be damaged by shaking from an earthquake.

true

Where the frequencies of seismic waves match the natural vibration frequencies of local geology and buildings, destruction may be great.

true

Which state listed below is most likely to have a magnitude 9 or larger earthquake in the next several hundred years

Washington