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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><title>R: The Joyner-Boore Attenuation Data</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <link rel="stylesheet" type="text/css" href="R.css" /> </head><body> <table width="100%" summary="page for attenu {datasets}"><tr><td>attenu {datasets}</td><td style="text-align: right;">R Documentation</td></tr></table> <h2>The Joyner–Boore Attenuation Data</h2> <h3>Description</h3> <p>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. </p> <h3>Usage</h3> <pre>attenu</pre> <h3>Format</h3> <p>A data frame with 182 observations on 5 variables. </p> <table summary="Rd table"> <tr> <td style="text-align: right;"> [,1] </td><td style="text-align: left;"> event </td><td style="text-align: left;"> numeric </td><td style="text-align: left;"> Event Number</td> </tr> <tr> <td style="text-align: right;"> [,2] </td><td style="text-align: left;"> mag </td><td style="text-align: left;"> numeric </td><td style="text-align: left;"> Moment Magnitude</td> </tr> <tr> <td style="text-align: right;"> [,3] </td><td style="text-align: left;"> station </td><td style="text-align: left;"> factor </td><td style="text-align: left;"> Station Number</td> </tr> <tr> <td style="text-align: right;"> [,4] </td><td style="text-align: left;"> dist </td><td style="text-align: left;"> numeric </td><td style="text-align: left;"> Station-hypocenter distance (km)</td> </tr> <tr> <td style="text-align: right;"> [,5] </td><td style="text-align: left;"> accel </td><td style="text-align: left;"> numeric </td><td style="text-align: left;"> Peak acceleration (g)</td> </tr> </table> <h3>Source</h3> <p>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. </p> <h3>References</h3> <p>Boore, D. M. and Joyner, W. B.(1982). The empirical prediction of ground motion, <em>Bulletin of the Seismological Society of America</em>, <b>72</b>, S269–S268. </p> <p>Bolt, B. A. and Abrahamson, N. A. (1982). New attenuation relations for peak and expected accelerations of strong ground motion. <em>Bulletin of the Seismological Society of America</em>, <b>72</b>, 2307–2321. </p> <p>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”, <em>Bulletin of the Seismological Society of America</em>, <b>73</b>, 1481–1483. </p> <p>Brillinger, D. R. and Preisler, H. K. (1984). An exploratory analysis of the Joyner-Boore attenuation data, <em>Bulletin of the Seismological Society of America</em>, <b>74</b>, 1441–1449. </p> <p>Brillinger, D. R. and Preisler, H. K. (1984). <em>Further analysis of the Joyner-Boore attenuation data</em>. Manuscript. </p> <h3>Examples</h3> <pre> 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) </pre> <hr /><div style="text-align: center;">[Package <em>datasets</em> version 3.6.0 <a href="00Index.html">Index</a>]</div> </body></html>