Focus and Epicentre
What form of energy does it release?
Seismic Waves
What is used to record seismograph?
Seismic waves
The amount of energy released by an earthquake is measured by what?
Magnitude
Name 1 major Earthquake Zones
Pacific Ring of Fire OR Mid-ocean ridges OR Eurasian-Melanesian mountain belt
What is crustal deformation?
The changing of the earth's surface
What is point where rocks break and slip called
Focus and Epicenter
What waves are seen first?
P waves are seen first
Magnitude is measured using what?
The Richter scale
Interconnected faults at plate boundaries are called what?
Fault zones
What is Crustal Deformation caused by?
Tectonic forces that are accumulated in the crust and then cause earthquakes
What is point on the earth’s surface directly above the focus?
The Epicentre
What are Seismographs used for?
They are instruments used to record the motion of the ground during an earthquake
True or False is Magnitude is logarithmic ?
True
What zone causes earthquakes?
Subduction zones
What are the 3 types of deformation?
Elastic, Ductile, and Brittle
What are two ways by which we can measure the strength of an earthquake?
Magnitude and Intensity.
When was the earliest seismoscope made?
132 A.D.
The amount of damage caused by an earthquake is measured by what?
Intensity
What are the 3 main earthquakes?
1. Shallow fault
2. Subduction zone
3. Deep earthquakes
What is Elastic deformation?
Strain that is reversible after a stress is released.
Why should we not panic during and after an earthquake?
So that you can think rationally and avoid doing things that can put you or others in danger.
What is the meaning of seismography?
The scientific measuring and recording of the shock and vibrations of earthquakes.
Intensity is measured using which scale?
The Mercalli scale
Where are 90% of earthquakes?
The Pacific Ocean
When does Ductile deformation occur?
When enough stress is applied to a material that the changes in its shape are permanent, and the material is no longer able to revert to its original shape.