attenu               package:datasets               R Documentation

The Joyner-Boore Attenuation Data

Description:

     This data gives peak accelerations measured at various observation
     stations for 23 earthquakes in California.  The data have been
     used by various workers to estimate the attenuating affect of
     distance on ground acceleration.

Usage:

     attenu

Format:

     A data frame with 182 observations on 5 variables.

       [,1]  event    numeric  Event Number
       [,2]  mag      numeric  Moment Magnitude
       [,3]  station  factor   Station Number
       [,4]  dist     numeric  Station-hypocenter distance (km)
       [,5]  accel    numeric  Peak acceleration (g)

Source:

     Joyner, W.B., D.M. Boore and R.D. Porcella (1981).  Peak
     horizontal acceleration and velocity from strong-motion records
     including records from the 1979 Imperial Valley, California
     earthquake.  USGS Open File report 81-365. Menlo Park, Ca.

References:

     Boore, D. M. and Joyner, W.B.(1982) The empirical prediction of
     ground motion, _Bull. Seism. Soc. Am._, *72*, S269-S268.

     Bolt, B. A. and Abrahamson, N. A. (1982) New attenuation relations
     for peak and expected accelerations of strong ground motion,
     _Bull. Seism. Soc. Am._, *72*, 2307-2321.

     Bolt B. A. and Abrahamson, N. A. (1983) Reply to W. B. Joyner & D.
     M. Boore's "Comments on: New attenuation relations for peak and
     expected accelerations for peak and expected accelerations of
     strong ground motion", _Bull. Seism. Soc. Am._, *73*, 1481-1483. 

     Brillinger, D. R. and Preisler, H. K. (1984) An exploratory
     analysis of the Joyner-Boore attenuation data, _Bull. Seism. Soc.
     Am._, *74*, 1441-1449.

     Brillinger, D. R. and Preisler, H. K. (1984) _Further analysis of
     the Joyner-Boore attenuation data_. Manuscript.

Examples:

     require(graphics)
     ## check the data class of the variables
     sapply(attenu, data.class)
     summary(attenu)
     pairs(attenu, main = "attenu data")
     coplot(accel ~ dist | as.factor(event), data = attenu, show.given = FALSE)
     coplot(log(accel) ~ log(dist) | as.factor(event),
            data = attenu, panel = panel.smooth, show.given = FALSE)

