Plate Tectonics:
Plate Tectonics Earth’s crust is broken into 7 large pieces called plates Sometimes plates crash together, pull apart, or sideswipe Plates are moving in different directions/speeds (2cm-10cm year) Boundaries (where plates meet) have different names Crash: Convergent Boundaries Pulling Apart: Divergent Boundaries Sideswiping: Transform Boundaries
Plate Tectonics:
Plate Tectonics
Plate Tectonic Locations:
Plate Tectonic Locations
Earthquake:
Earthquake
Slide 8:
Richter magnitudes Description Earthquake effects Frequency of occurrence Less than 2.0 Micro Not felt About 8,000 per day 2.0-2.9 Minor Usually not felt About 1,000/ day 3.0 - 3.9 Minor Often felt, no damage 49,000/year 4.0 – 4.9 Light Shaking, rattling 6,200/year 5.0 – 5.9 Moderate Damage to weak buildings 800 per year 6.0 – 6.9 Strong Destructive up to 160km 120 per year 7.0 – 7.9 Major Serious damage 18 per year 8.0 – 8.9 Great Serious damage larger area 1 per year 9.0 – 9.9 Great Devastating 1 per 20 years 10.0+ Massive Never recorded Extremely rare Each level is 10 times stronger than the previous level
Tsunami:
Tsunami
Tsunami Warning Signs :
Tsunami Warning Signs Feel strong quake Drawback- water recedes
Slide 12:
Safety Tips What to do When a Tsunami Hits Get to higher ground Stay in a safe place-more waves coming- some stronger If you can’t get to higher ground, find something that floats and hang on