Earthquake               package:nlme               R Documentation

Earthquake Intensity

Description:

     The 'Earthquake' data frame has 182 rows and 5 columns.

Format:

     This data frame contains the following columns:

     Quake an ordered factor with levels '20' < '16' < '14' < '10' <
          '3' < '8' < '23' < '22' < '6' < '13' < '7' < '21' < '18' <
          '15' < '4' < '12' < '19' < '5' < '9' < '1' < '2' < '17' <
          '11' indicating the earthquake on which the measurements were
          made.

     Richter a numeric vector giving the intensity of the earthquake on
          the Richter scale.

     distance the distance from the seismological measuring station to
          the epicenter of the earthquake (km).

     soil a factor with levels '0' and '1'  giving the soil condition
          at the measuring station, either soil or rock. 

     accel maximum horizontal acceleration observed (g).


Details:

     Measurements recorded at available seismometer locations for 23
     large earthquakes in western North America between 1940 and 1980.
     They were originally given in Joyner and Boore (1981); are
     mentioned in Brillinger (1987); and are analyzed in Davidian and
     Giltinan (1995).

Source:

     Pinheiro, J. C. and Bates, D. M. (2000), _Mixed-Effects Models in
     S and S-PLUS_, Springer, New York.  (Appendix A.8)

     Davidian, M. and Giltinan, D. M. (1995), _Nonlinear Models for
     Repeated Measurement Data_,  Chapman and Hall, London.

     Joyner and Boor (1981), Peak horizontal acceleration and velocity
     from strong-motion records including records from the 1979
     Imperial Valley, California, earthquake, _Bulletin of the
     Seismological Society of America_, *71*, 2011-2038.

     Brillinger, D. (1987), Comment on a paper by C. R. Rao,
     _Statistical Science_, *2*, 448-450.

