Earthquake               package:nlme               R Documentation

_E_a_r_t_h_q_u_a_k_e _I_n_t_e_n_s_i_t_y

_D_e_s_c_r_i_p_t_i_o_n:

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

_F_o_r_m_a_t:

     This data frame contains the following columns:

     _Q_u_a_k_e 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.

     _R_i_c_h_t_e_r a numeric vector giving the intensity of the earthquake on
          the Richter scale.

     _d_i_s_t_a_n_c_e the distance from the seismological measuring station to
          the epicenter of the earthquake (km).

     _s_o_i_l a factor with levels `0' and `1'  giving the soil condition
          at the measuring station, either soil or rock. 

     _a_c_c_e_l maximum horizontal acceleration observed (g).

_D_e_t_a_i_l_s:

     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).

_S_o_u_r_c_e:

     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.

_E_x_a_m_p_l_e_s:

     data(Earthquake)

