Review

What is the focus of an earthquake

• The place with the most damage and/or highest toll of human injury

• The spot on the earth's surface directly above where the rock rupture occurs

• Where the actual rupture of rock occurs in the subsurface producing the earthquake

• Where the seismic energy of the earthquake is concentrated

• Where the direct seismic waves combine with the waves reflecting from the earth's core

Which seismic wave type travels the fastest

• P

• Surface

• Rayleigh

• Love

• S

Which seismic wave type is most damaging

• P

• Body

• S

• Love

• Raleigh

Which of these scales is a qualitative measure of seismic shaking

• Richter Scale

• Logarithmic Scale

• California Seismic Magnitude Scale

• Moment Magnitude Scale

• Mercalli Scale

How do we determine the location of an earthquake

• Seismic Reflection

• Seismic Refraction

• Triangulation

• Seismic Absorption

• Shake Maps

An increase of one on the Richter scale is equivalent to an increase in actual ENERGY released of ________?

• 32

• 100

• 10

• 1

• 3.2

"When an earthquake occurs in a horst-graben situation, where is seismic shaking greatest?"

• in the rigid bedrock of the horsts

• in the poorly consolidated sediments of the valleys (grabens)

• on the other side of the valley

• at the distal edge of the earthquake

• at the boundary between the horst and graben (the mountain front)

Which building type is most likely to collapse in an earthquake?

• Base isolated steel

• Reinforced masonry

• Wood frame

• Unreinforced masonry

• Steel frame

What is required for liquefaction to occur in an earthquake

• houses and buildings

• bedrock

• air in pore spaces

• saturated unconsolidated sediment

• folds in the sediment

What is a water budget

• compares precipitation against evaporation and discharge

• subtracts irrigation water from culinary water

• compares fresh and polluted water

• calculates the value of a groundwater resource

• used to calculate the consumer water bill