option D LO4

Question 1

forecast vs prediction

Answer 1

forecast – more vague, not always true
predictions: more precise statements on time, place, and size

Question 2

how can measurements and monitoring help predict earthquakes 8

Answer 2

1. monitoring changes in groundwater level
2. changes in radon gas conc (gas escape via microfissures)
3. anomalies in erath magnetic field and changes in electrical resistivity of rocks
4. foreshocks
5. small scale ground surface changes
6. small scale uplift or collapsing of land
7. ground tilt
8. changes in animal behaviour

Question 3

5 ways to predict volcanoes

Answer 3

Seismographs: small earthquakes before …
Chemical sensors
lasers/GPS
Ultrasound monitor low freq waes
Observations