1. Earthquake hazards refer to potential dangers caused by earthquakes, including primary effects like surface ruptures and secondary effects like landslides, tsunamis, liquefaction, and fires.
2. Common earthquake hazards are landslides, tsunamis, liquefaction of soil, and fires caused by broken gas and electrical lines. These secondary effects can overwhelm communities and damage structures.
3. Key methods to reduce earthquake risks include effective earthquake monitoring, developing seismic hazard maps, and constructing earthquake-resistant buildings using materials like steel that can withstand seismic forces without damage. Building codes based on hazard maps help develop safer structures.