seismic zones
Fault line areas
Seismic zones are geographic regions classified by their earthquake risk and activity.
Engineers and building codes reference seismic zones to determine structural requirements: Buildings in high seismic zones require special foundation design.
The zones typically range from minimal risk to very high risk, based on historical earthquake frequency and geological fault lines.
- earthquake zonesAreas prone to tremors
- seismic activityUnderground geological movement
- fault linesFractures between rock masses
- tectonic platesMobile crustal sections
- plate tectonicsEarth's crust mobility theory
plate boundaries · subduction zones · San Andreas · building codes · geophysics · lithosphere · rift valleys · ring of fire · fault · earthquake engineering · quake · early warning systems · slip · geodesy · crustal · liquefaction · magnitude scale · tremors
- earthquakesearthquake, quake, earthquakes, quakes, epicenter
- American geologyGrand Canyon, Yellowstone, Rocky Mountains, Appalachians, Sierra Nevada
- seismologyearthquake, earthquakes, seismicity, seismometer, seismic activity
- US GeologyAppalachians, Rocky Mountains, Rockies, Grand Canyon, San Andreas Fault
- disastersdisaster, earthquake, earthquakes, catastrophe, floods
- geologybedrock, fault lines, faults, rock, basalt