Measuring Hazards

What is the Richter scale?
Measures the amplitude of earthquake waves. It is an absolute, logarithmic scale with no units.
1 of 6
What is the Mercalli scale?
Measures the experienced impacts of earthquakes and so is subjective and relative (affected by place). Goes from I to XII
2 of 6
What is the MMS?
The Moment Magnitude Scale (MMS) is the preferred method of measuring earthquakes as it is more accurate. It records the energy released (seismic moment) in an infinite scale that generally stops at 10.
3 of 6
What is the VEI?
The Volcanic Explosivity Index (VEI) is a relative measure of how explosive an eruption was, based on volume of products, height of eruption cloud etc. It is logarithmic from 0-8.
4 of 6
What are hazard profiles?
Comparisons of the physical processes that all hazards share, used to rank hazards as to which need the most resources. They can compare different types of hazard but may be inaccurate due to differences in measurement and impacts.
5 of 6
What characteristics do hazard profiles compare?
Magnitude, speed of onset, areal extent, duration, frequency, spatial predictability.
6 of 6

Other cards in this set

Card 2

Front

What is the Mercalli scale?

Back

Measures the experienced impacts of earthquakes and so is subjective and relative (affected by place). Goes from I to XII

Card 3

Front

What is the MMS?

Back

Preview of the front of card 3

Card 4

Front

What is the VEI?

Back

Preview of the front of card 4

Card 5

Front

What are hazard profiles?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Geography resources:

See all Geography resources »See all Tectonic Processes and Hazards resources »