quake


The dataset provides the location of earthquake epicenters within California for the period 1800-2000.  All earthquakes are of a magnitude 5.50 or greater.   


datasets

Includes two functions to evaluate the hypothesis of complete spatial randomness (csr) in point processes.  The function 'mwin' calculates quadrat counts to estimate the intensity of a spatial point process through the moving window approach proposed by Bailey and Gatrell (1995).  Event counts are computed within a window of a set size over a fine lattice of points within the region of observation.  The function 'pielou' uses the nearest neighbor test statistic and asymptotic distribution proposed by Pielou (1959) to compare the observed point process to one generated under csr.  The value can be compared to that given by the more widely used test proposed by Clark and Evans (1954).

Sarah Smith

csrplus

Methods to Test Hypotheses on the Distribution of Spatial Point
Processes

quake function

A data frame with 383 observations on the following 4 variables.
  <dl>
    <dt><code>Date</code></dt><dd>a numeric vector giving the date in  (yyymmdd) format</dd> <dt><code>Latitude</code></dt><dd>a numeric vector giving the latitude</dd> <dt><code>Longitude</code></dt><dd>a numeric vector giving the longitude</dd> <dt><code>Magnitude</code></dt><dd>a numeric vector giving the magnitude</dd> </dl> 

Format

"California Earthquake History and Catalogs." CA.Gov. California Department of Conservation, n.d. Web. <http: www.consrv.ca.gov="" cgs="" rghm="" quakes="" pages="" index.aspx="">.</http:>

quake: California Earthquakes

Description

Usage

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Source

Examples