Tectonics: 1.1 - Japanese Garman (C.S) Flashcards
Vulnerability
How susceptible something/someone is to danger
Event
Natural situation that doesn’t affect people (e.g an earthquake in the middle of an ocean)
Hazard
Natural situation that is dangerous and affects people (e.g an earthquake in the middle of a city)
Capacity to cope/resilience
The ability of a country exposed to hazards to resist, absorb, and recover from the impact
Risk
Probability of a hazard occurring that leads to loss of life
Disaster
Impact of a hazard, leading to significant loss of life, animals, capital, etc.
Threshold
Critical point after which a hazard becomes a disaster
Risk equation
Hazard x vulnerability / capacity to cope
Magnitude
Size/strength of an event/hazard
Richter Scale
EQ scale: 1-10
Qualitative
Logarithmic (1=1, 2=10, 3 = 100 etc.)
Moment Magnitude Scale
EQ Scale: 1-10
Quantitative
Used for magnitudes above 5 on Richter Scale (difference between magnitudes becomes more unclear -> unreliable)
Mercalli Scale
EQ Scale: 1-12 (written in Roman numerals)
Qualitative
Measures the impact of an earthquake
Volcanic Explosivity Index
Volcano Scale: 1-8
Quantitative, logarithmic
Measures amount of material expelled (no volcanoes are big enough to go over 8)
Epicentre
Surface point of EQ directly above focal point
Focal point
Origin of an earthquake below the surface