1. Earthquakes and Volcanoes
Seismic Hazards

2. Ring of Fire

4. Ring of Fire
Earthquakes and volcanoes are not distributed randomly- they occur in specific regions- usually along a zone where plate boundaries meet
Ring of Fire-zone along the Pacific Ocean that rings it, where earthquakes and volcanoes are the most common/active

5. Seismic hazards
Tsunamis: giant wave generated by a slip in the earth’s surface and thus an earthquake
Building collapse, fires, water main breaks, gas main breaks result
Liquifaction-occurs when ground saturated with water actually flows like a liquid with intense shaking

7. Volcanic Hazards Lava, ash is deadly Mudflows or larhars are deadly
Toxic gases
Pyroclastic bombs, explosions are deadly
Cause acid rain
Landslides
Even though violent, lead to fertile soil

9. Seismic Risk Map (USA)