"Tectonic hazards": HTML5 Crossword

Across

1. Any material ejected from a volcano such as ash, rock and lava (6)
3. A secondary hazard from an earthquake (7)
5. The point at the centre of the earthquake (5)
7. The instrument which measures an earthquake (10)
9. The case study of an earthquake in an HIC (12)
11. The location of the early warning centre in the Pacific (6)
12. One prediction tool for earthquakes (7,3,6)
15. The gas measured which indicates a volcano may erupt (7)
16. A map highlighting the areas at risk from a tectonic hazard (6,7)
18. A hazard of an earthquake which causes water to rise to the surface (12)

Down

2. The scientific scale used to measure an earthquake (7,5)
4. The area where the magma is stored before it erupts (5,7)
6. The most deadly hazard from a volcano (11,4)
8. The day of drills in USA (5,10,5,3)
10. The type of lava erupted from a stratovolcano (8)
13. A mudflow created by a volcanic eruption (5)
14. A way of guessing when the next eruption will occur (10)
17. An area in USA where scientists are based to study earthquakes (9)