Earthquake Epicentre Locations

Description

The MtStHelens data frame has 640 latitude/longitude pairs corresponding to the locations of epicentres of earthquakes in the Mount Saint Helens region of U.S.A.

Usage

data(MtStHelens)

Format

This data frame contains the following columns:

latitude

degrees latitide of an epicentre location.

longitude

degrees longitude of an epicentre location.

Source

O'Sullivan, F. and Pawitan, Y. (1993). Multivariate density estimation by tomography. Journal of the Royal Statistical Society, Series B, 55, 509-521.

Examples

data(MtStHelens)
plot(MtStHelens$longitude,MtStHelens$latitude,
     xlab = "degrees longitude",ylab = "degrees latitude")
library(KernSmooth)
densEst <- bkde2D(cbind(MtStHelens$longitude,MtStHelens$latitude),bandwidth = c(0.005,0.005))
contour(densEst$x1,densEst$x2,densEst$fhat,col = "blue",lwd = 2,
        xlab = "degrees longitude",ylab = "degrees latitude")
points(MtStHelens$longitude,MtStHelens$latitude,col = "red",cex = 0.3)