Nightmare in the West
Unlike the north/south sliding of the San Andreas Fault, sudden westward movement of the "Hammer"would stimulate fault slippage throughout the Southwestern US and Northern Mexico, destroying the bridges and dams along the fault lines.
Large western US cities affected would include San Diego, Los Angeles, San Francisco, Las Vegas, Salt Lake, Denver, Albuquerque and El Paso.
Sand Diego would be swept by tidal waves after the force of seismic waves damages roads and bridges needed to evacuate the population from harms way.
Los Angeles is a special case since the basin is underlain by loose material scraped from the Pacific floor during the continents westward migration. Shock waves accompanied by sharp physical movement could trigger a deep settling and even "liquefaction" of this material. How much could depend on the space created by the removal of water and oil from the regions underlying strata.
San Francisco is not too far away for damage from both seismic and tidal forces, but their long history of encounters will limit their damage.
Las Vegas can expect major tectonic movement and seismic damage. Their electric and water will be lost. Land travel will not lead anywhere that they would want to go. Reliance on air travel will enable new supplies delivery and disaster assistance to get in.
Salt Lake and Denver are likely to get seismic damage but remain operational and will be bases for disaster relief organizations.
Albuquerque sits in the Rio Grande Rift and would experience volcanism and earthquakes.
El Paso sits on the fault line where it moves very slightly but that may be enough to do significant damage. Services from the rest of Texas should keep it working well. It is likely to be the major source of supplies for Phoenix and the rest of Arizona since Interstate Ten should be quickly repaired and passable.
Although Phoenix does not sit on the fault line, it would be isolated from the rest of the continent by land. Few railroads or highways would be passable between the Arizona cities and the rest of the country. Fresh water supplies available from lakes would be greatly reduced or cease, as would supplies of gasoline and natural gas. Electricity generated by the Palo Verde Nulear Power Plant and solar power might be the only reliable sources. Arizona has a strong air transit industry and emergency services and supplies will accessible by plane. The area may have to wait a long time for emergency services from the rest of the country by land since all the roads leading into the area will pass through other major metropolitan areas also hard hit. |