\Header{quakes}{Locations of Earthquakes off Fiji}
\keyword{datasets}{quakes}
\begin{Description}\relax
The data set give the locations of 1000 seismic events of MB > 4.0.
The events occurred in a cube near Fiji since 1964.
\end{Description}
\begin{Usage}
\begin{verbatim}data(quakes)\end{verbatim}
\end{Usage}
\begin{Format}\relax
A data frame with 1000 observations on 5 variables.
\Tabular{rlll}{
[,1] & lat      & numeric & Latitude of event\\{}
[,2] & long     & numeric & Longitude\\{}
[,3] & depth    & numeric & Depth (km)\\{}
[,4] & mag      & numeric & Richter Magnitude\\{}
[,5] & stations & numeric & Number of stations reporting
}
\end{Format}
\begin{Details}\relax
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.
\end{Details}
\begin{Source}\relax
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.
\end{Source}
\begin{Examples}
\begin{ExampleCode}
data(quakes)
pairs(quakes, main = "Fiji Earthquakes, N = 1000", cex.main=1.2, pch=".")
\end{ExampleCode}
\end{Examples}

