huangyhg

seismic lookup by zip code
i have found these two sites to be useful:
lookup seismic data by zip code (per usgs)...
note that these values are from 1996 usgs maps which are the basis for both the ibc 2000 and ibc 2003.
the ibc 2006 as well as other codes which have adopted the new maps in advance (i.e. georgia is still under ibc 2000 but has adopted the new maps) use the usgs 2002 data. this data has not yet been posted by zip code but may be used with latitude and longitude than can be found by zipcode as described below.
note that this data is still useful in ibc 2000/2003 situations in that the new maps can be an indicator of what a "site specific" study by a geotech might provide. reason being that similiar attenuation equations etc. used by geotech's to calculate accelerations were implemented in part to make the 2002 maps.
willisv,
i knew these maps were going to change for the ibc 2006 but didn't know where to find it. this is good information to have. i'm going to bookmark these pages too.
thanks for the info!
-mike
the tiger maps by the u.s. census also provide latitude and longitude for map locations.
willsv,
you said the usgs 2006 data can still be useful with the ibc 2000/2003 situations. do we have a choice, or what?
thanks,
-mike
mike,
the usefulness comes into play in that the usgs 2002 data can be used to provide yourself with an estimate of what a geotech might provide for ss and s1 with a site specific study (i.e. get a preview of what reduction might be possible prior to actually paying for the study). we have no choice as to what we can use - whichever one the governing code in the state in question references.
willisv,
thanks for the info!
-mike

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