Bay Area Earthquakes

SUMMARY:
The quakes.bay data frame is a marked spatial point pattern data set listing the location, time and magnitude of earthquakes in the San Francisco Bay Area from 1962 to 1981.

DATA DESCRIPTION:
The data frame contains the following columns:
longitude:
negative longitude of quake location.
latitude:
latitude of quake location.
magnitude:
the size of the quake.
date:
the date of the quake, an object of class dates.
hour:
the hour of the quake.
minute:
the minute of the quake.
second:
the second of the quake.

SOURCE:
The data are from Peter Guttorp, Statistics Department, University of Washington, Seattle, Washington.