Earthquakes Flashcards
What are the causes of earthquakes?
Build up of tension within rocks
Shallow focus - greatest damage
Intermediate focus - 70-300km deep
Deep focus - 300-700km deep
What is the focus of an earthquake?
The place where the earthquake originates
What are the 3 types of shockwave?
P waves - back and forth (primary waves)
S waves - vertical (secondary waves)
L waves - water like waves (surface waves)
What is the epicentre of the earthquake?
The place on the Earth’s surface where the earthquake is felt
When did the Sichuan earthquake occur?
2:28pm 12th May 2008
When was the Kobe earthquake?
17th January 1995 5:46am
What caused the 7.4 Kobe earthquake?
The Pacific plate subducts the Eurasion
What were the short term effects of the Kobe earthquake?
5,000 died 35,000 injured 300,000 homeless Communication lost Buildings destroyed by liquidation and fire International aid was rejected
What were the long term effects of the Kobe earthquake?
£100 billion spent on repairs
Jan 1999 - people still in temporary accommodation
Thousands of seismometers set up
Why did the Sichuan earthquake occur?
The Indi-Australian plate collides with the Eurasian plate
What was the magnitude of the Sichuan earthquake?
7.9
What were the short term effects of the Sichuan earthquake?
5 million buildings collapsed 69,185 people dead Supplies sent in by air Communication lost 374,171 injured 8 schools topple Foreign relief
What were the long term effects of the Sichuan earthquake?
46,200,000 people affected ¥55 billion spent by end of June Landslides/rockfalls damaged and blocked roads 400,000 homes need rebuilding $86 billion lost
