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Earthquake - Coggle Diagram
Earthquake
What waves do earthquake make
primary wave
fastest
back and forth
move in solid and liquid layers
secondary wave
half speed of primary
up and down
only move in solid layer
surface wave
slowest
travel along earth's surface
cause most damage
seismometer
Tsunamis
move 500-1000km per hour
wave isn't very high
mostly happens at 6.5 richter scale
can be predict
can send warning to every people
what is earthquake
A sudden movement of earth curst
a suddenly slip of crust
earthquake's focus
in the ground
earthquake's epicenter
the point on the ground
happen along the boundaries of earth's tectonic plates
Locating earthquake
difference between the arrival of P wave and S wave
need three station to know the exact location
How can people prepare
building stracture
know what to do when earthquake happen
secure objects that might fall
know the safe spot at your home
kitchen counter
a sturdy table
How is an earthquake's energy measured
Magnitude
Richter scale(芮氏規模)
30 times per level
7.6/ 5.6- 900 times bigger
the amount of energy released