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6. What is the speed of P waves

  • 8 km/s
  • 9 km/s
  • 10 km/s
  • 7 km/s

7. What does infrared measure?

  • Heat energy
  • velocity
  • gas flux

8. How is ground motion measured

  • G force
  • P force

9. Eruptive style one consists of

  • effusive, low silica, divergent and hotspots
  • explosive, high silica, convergent

10. What is phreatomagmatic?

  • when surface water and magma interact; explosive and pulsed
  • when magma interacts with air it forces open the vent
  • When internal pressure within the vent causes the top to explode

11. What does the Mercalli scale measure?

  • intensity
  • magnitude

12. Water pressure and the downslope component of weight are examples of

  • shearing processes
  • shear strength

13. What does UV absorption measure?

  • gas flux
  • heat
  • velocity

14. Bombs are

  • >4mm
  • >64mm
  • 4-64mm

15. What does doppler radar measure?

  • veolcity
  • heat
  • gas flux

16. VT volcanoes are measured by... ?

  • Measured weeks to months in advance
  • hours-days

17. Ash is

  • >4mm
  • 4-64mm
  • 64mm

18. What is a Sturzstrom?

  • catastrophic tsunami triggered by earthquakes
  • catastrophic debris stream triggered by rock avalanches
  • catastrophic landslide triggered by earthquakes