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Visual Glossary - amplification |
 | | Shaking levels at a site may be increased, or amplified, by focusing of seismic energy caused by the geometry of the sediment velocity structure, such as basin subsurface topography, or by surface topography. |
| | Two important local geologic factors that affect the level of shaking experienced in earthquakes are (1) the softness of the surface rocks and (2) the thickness of surface sediments. |
| | This image of the Los Angeles region combines this information to predict the total amplification expected in future earthquakes from local geologic conditions or site effects. |
| earthquake.usgs.gov /learning/glossary.php?term=amplification (108 words) |
