Subject: Re: Seismic Zone for Stockton California?
Date: Tue, 8 Feb 2000 02:10:10 EST
The official definition for Zone three is contained in the California
Building Code, Section 1629A.4.1 Seismic Zone. All portions of the state
except those specifically listed are defined as being in Zone 4. The dividing
lines used are county boundaries, lines of latitude or longitude, rivers or
highways. In the case of Stockton, which is in San Joaquin County, the
definition of zone 3 is "..., the portion of San Joaquin County northeast of
Interstate Highway 580, ..." The counties of Alameda and Contra Costa are
immediately to the west of San Joaquin and are located in zone 4. From the
"Northern California Atlas & Gazetteer" published by DeLorme, the nearest
side of Stockton is about 12 miles east of the Contra Costa County/San
Joaquin County line and is entirely northeast of Interstate Highway 580, thus
it is in zone 3. Lodi is also in Zone 3. Livermore, being in Alameda County,
is in Zone 4.
Bill Cain S.E.