| Question |
Answer |
| focus | point within Earth where the earthquake starts |
| epicenter | location on the surface directly above the focus |
| fault | fractures in the Earth where movement has occurred |
| aftershock | movement that follows a major earthquake |
| seismograph | instrument that records earthquake waves |
| surface waves | seismic waves that travel along Earth's outer layer |
| body waves | waves that travel through Earth's interior; include primary and secondary waves |
| primary wave | fastest body wave; compressional |
| secondary wave | slower than a primary wave; move particles perpendicular to the direction of wave |
| moment magnitude | measurement for earthquakes used by scientists; estimates the energy released by earthquakes |
| Richter Scale | magnitude scale based on the amplitude of the largest seismic wave; used in most news reports |
| tsunami | Japanese word for seismic sea wave |
| intensity | measure of damage to the surface and effects on humans |
| three | number of seismic stations required to locate an epicenter |
| foreshocks | small earthquakes that preceed a major earthquake |
Cardio Block2anatomy
