K (1) DimensionLess wave number (Eq. 9); (2) also numerical 



surge velocity coefficient (Eq. D-17) 



L (1) Length of earthquake fault; (2) also length of channel or 



embayment 



m Numerical integer 



M Earthquake magnitude (Richter scale) 



n Numerical integer 



N Mean annual number of earthquakes (felt beyond a radius of 



200 km. from their epicenters) 



Q(r) Magnitude of initial vv'ater surface elevation (function of r) 



Q Constant value of Q(r) 



r Variable (radial) distance 



R Limiting radius of initial water surface elevation 



s Slope of sea bed or of land near the coast 



S Equivalent diameter of tsunami source region 



t Variable time 



T Wave period 



T Value of T for n mode of oscillation of a basin or 

 embayment (n = 1 , 2, 3 ) 



T Value of T for m mode of oscillation of a continental shelf 



m 



u Horizontal water particle velocity in a vv^ave or surge 



u Water velocity at and near the front of a tsunami surge 



X Variable distance 



a Aniplification factor for wave amplitude 



13 Numerical coefficient (Eq. 23) 



y Ratio of crest height above still water level to wave height 



8 Dimensionles s disturbance coefficient representing energy 



loss at the front of a bore 



382 



