09-11-2016, 04:54 PM
1468157193-earthquakes.ppt (Size: 9.47 MB / Downloads: 201)
EARTHQUAKES
What to explore this week:
Predictablity
Linkages
Disastrous consequences
Impact of human activity
Minimizing the impact
Earthquake Terminology
What causes earthquakes?
Elastic Rebound
Sources of stress
Plate Tectonics
Other stresses
Measurement
Magnitude
one per earthquake
related to energy released
Richter or Moment scale
Intensity
many for each earthquake
measure of effects
Mercalli scale
Damage: Causes
Ground motion
Duration of Shaking
Surface Rupture
Poor building design
Effects
Rupture
Death
Bldg collapse
Effects
Fires
Liquifaction
Landslides
Damage: Key Factors
Amount & duration of shaking
Water content of soil
Population concentration
Building construction
Distance from Epicenter
Depth of focus
Direction of rupture
Material amplification
Addressing the Hazard
Identify areas at risk
Forecast
Addressing the Hazard
Structural adaptations
Warning systems
EARTHQUAKES
In what ways are earthquakes predictable?
To what other hazards are earthquakes linked?
What are the potentially disastrous consequences of earthquakes?
In what ways has human activity made earthquake hazards catastrophic?
How can the hazardous consequences of earthquakes be minimized?