getmagsize: Earthquake Magnitude based on exponentional
In GEOmap: Topographic and Geologic Mapping

getmagsize

R Documentation

Earthquake Magnitude based on exponentional

Description

Estimate a size for plotting earthqukes recorded as a logarithmic scale

Usage

getmagsize(mag, minsize = 1, slope = 1, minmag = 0, maxmag = 8, style = 1)

Arguments

`mag`	magnitudes from catalog
`minsize`	minimum size
`slope`	slope for linear scale
`minmag`	min magnitude
`maxmag`	max magnitude
`style`	Style of plotting: 0= all the same size; 1(default): exponential scale; 2=linear scale

Details

The idea is to have a scale reflect the size of the earthquake. The default style (1) has a few parameters left over from old program geotouch.

Value

vector of sizes for plotting

Author(s)

Jonathan M. Lees<jonathan.lees@unc.edu>

Examples


mag = 0:9

x = runif(10, 1, 100)
y  = runif(10, 1, 100)

g = getmagsize(mag)

plot(c(0, 100), c(0, 100), asp=1, type='n')

points(x, y, pch=1, cex=g)

GEOmap documentation built on Sept. 11, 2024, 7:57 p.m.