R: Earthquake Magnitude based on exponentional

getmagsize {GEOmap} | 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)

[Package GEOmap version 2.4-0 Index]