HELEQ                 package:RTOMO                 R Documentation

_M_o_u_n_t _S_a_i_n_t _H_e_l_e_n_s _E_a_r_t_h_q_u_a_k_e _C_l_u_s_t_e_r _a_s_s_o_c_i_a_t_e_d _w_i_t_h _t_h_e _1_9_8_0 _E_r_u_p_t_i_o_n

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

     Mount Saint Helens Earthquake Cluster associated with the 1980
     Eruption

_U_s_a_g_e:

     data(HELEQ)

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

     List:

     _y_r year

     _m_o Month

     _d_o_m Day of Month

     _h_r Hour

     _m_i Minute

     _s_e_c Second

     _j_d Julian Day

     _l_a_t latitude, signed decimal degree (West is negative)

     _l_o_n longitude, signed decimal degree

     _z depth, km

     _m_a_g magitude

     _g_a_p gap

     _d_e_l_t_a distance to nearest station

     _r_m_s root, mean square error

     _h_o_z_e_r_r horrizontal uncertainty, km

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

     This is a small selection of the events associated with the
     eruption.

_R_e_f_e_r_e_n_c_e_s:

     Lees, J. M.  (1992): The magma system of Mount St. Helens:
     Non-linear high resolution P-wave tomography, J. Volc. Geoth.
     Res., 53(1-4), 103-116.

     Lees, J. M. and R. S. Crosson (1989): Tomographic inversion for
     three-dimensional velocity structure at Mount St. Helens using
     earthquake data, J. Geophys. Res., 94(B5), 5716-5728.

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

     data(HELEQ)
     ## maybe str(HELEQ) ; plot(HELEQ) ...

