Seismic

Question 1

Seismicity

Answer 1

Earth shaking and can be human induced (eg mining, fracking or construction)

Question 2

Tsunami

Answer 2

Caused by underwater earthquakes. Secondary hazard

Question 3

P wave

Answer 3

Movement is parallel to the direction of energy and the ground
Fastest like a pulse.
Cause earth to move backwards and forwards

Question 4

S wave

Answer 4

Movement is upwards
Moving in the direction of energy
Shake earth at right angles
Can’t move through liquids

Question 5

Rayleigh waves

Answer 5

Movement is ungulating in the direction of energy

Low frequency rolling movement

Question 6

Love wave

Answer 6

Movement is perpendicular to the direction of energy, the ground moving side to side
Slowest
Side ways motion
Cause most damage

Question 7

Richter scale

Answer 7

3 is 10x greates than 2
Measures the ground deformation and energy release by an earthquake
Allows a comparison of magnituted

Question 8

Mercantile scale

Answer 8

Easy to understand and so co ordinate people, but difficult to compare

Question 9

Predicting seismic hazards: past seismic events

Answer 9

Studying past hazards is useful because if an event already happens again
Frequency
Location
Learn how to respond well

Question 10

Predicting seismic hazards: remote sensing

Answer 10

The acquisition of information about an object without making physical contact with it
By using satellite or aircraft
Gather data via detecting merger reflected from the earth

Question 11

Predicting seismic hazards: radon gas emission

Answer 11

Gas levels spike before earthquake
Earth/ rock crack trapped gas release and tracked
Charpak detector- gas filled chamber, radon ionised the gases (as radioactive(
Expensive and permanent