SYMBOLS AND DEFINITIONS --Continued 



L e effective length of harbor or inlet 



Lf fault length 



L wavelength at lowest mode of resonance (Helmholtz mode) 



Lw longshore wavelength 



L, wavelength in deeper water 



L„ wavelength in shallower water 



I length of slope connecting sea bottom to a shelf 



l s distance across a shelf 



M Richter magnitude of earthquakes 

 • moment 



M momentum 



m tsunami magnitude 



N normalized horizontal water particle displacement 



n Manning roughness coefficient 



n(m) probability of tsunami with magnitude m being generated in any 

 given year 



P(Z) probability of runup to elevation Z 



p pressure 



•a coefficient in wave refraction 



Q flow rate under a wave 



q a coefficient in wave refraction 



•velocity of a water particle under a wave 



R a coefficient 



•vertical height of runup above the Stillwater level at the 

 shoreline 



R average runup height at a shoreline area 



R radius of the Earth 



Rg radius from the center of curvature to the shoreline 



13 



