| % File src/library/datasets/man/quakes.Rd |
| % Part of the R package, https://www.R-project.org |
| % Copyright 1995-2007 R Core Team |
| % Distributed under GPL 2 or later |
| |
| \name{quakes} |
| \docType{data} |
| \alias{quakes} |
| \title{Locations of Earthquakes off Fiji} |
| \description{ |
| The data set give the locations of 1000 seismic events of MB > 4.0. |
| The events occurred in a cube near Fiji since 1964. |
| } |
| \usage{quakes} |
| \format{ |
| A data frame with 1000 observations on 5 variables. |
| \tabular{rlll}{ |
| [,1] \tab lat \tab numeric \tab Latitude of event\cr |
| [,2] \tab long \tab numeric \tab Longitude\cr |
| [,3] \tab depth \tab numeric \tab Depth (km)\cr |
| [,4] \tab mag \tab numeric \tab Richter Magnitude\cr |
| [,5] \tab stations \tab numeric \tab Number of stations reporting |
| } |
| } |
| \source{ |
| This is one of the Harvard PRIM-H project data sets. They in turn |
| obtained it from Dr. John Woodhouse, Dept. of Geophysics, Harvard |
| University. |
| } |
| \details{ |
| There are two clear planes of seismic activity. One is a major plate |
| junction; the other is the Tonga trench off New Zealand. These data |
| constitute a subsample from a larger dataset of containing 5000 |
| observations. |
| } |
| \examples{ |
| require(graphics) |
| pairs(quakes, main = "Fiji Earthquakes, N = 1000", cex.main = 1.2, pch = ".") |
| } |
| \keyword{datasets} |