A natural hazard is a naturally occuring event that has the potential to affect people's lives or property.
Continental = thicker but less dense than oceanic.
Earthquakes @ destructive plate boundaries:
Tension build up as one plate gets stuck as it's moving past the other into the mantle. Plates eventually jerk past one another, sneding out shockwaves.
Focus - the point in the Earth where the earthquake starts.
Some volcanoes form over parts of the mantle which are really hot, called hotspots.
Sustainable ways to reduce impacts of earthquakes:
building techniques, planning, education, & aid.
Ways to predict an earthquake:
small tremors, cracks appearing, strange animal behaviour, data from past earthquakes.
Ways to predict a volcanic eruption:
tiny earthquakes, escaping gas, & changes in the shape of the land.
Ways to prevent:
planning: future developments (housing), firebreaks, emergency services training, evacuation routes.
building techniques: strengthened to withhold fallling ash, barriers to divert lava.
education: how to evacuate, how to make a survival kit.
aid: ledcs can receive food/water/medical help/money etc.