| A | B |
|---|
| Focus | Point where earthquake energy is released |
| epicenter | Point on earth's surface directly above the origin of an earthquake |
| surface wave | wave that produces the most surface damage |
| mantle | Layer of earth directly below the crust |
| seismograph | instrument that recordsw seismic waves |
| magnitude | measure of energy released by an earthquake |
| tsunami | seismic sea wave |
| seismologist | scientist who studies earthquakes |
