CONTENTS--Continued 



Page 



VIII TSUNAMI WARNING SYSTEM AND INSTRUMENTATION 193 



1. The Tsunami Warning System 194 



2. Human Response 196 



3. Ionospheric Waves 198 



4. Deep-Ocean Tsunami Gages 198 



IX SUMMARY AND CONCLUSIONS. 199 



LITERATURE CITED 201 



APPENDIX TSUNAMIS OCCURRING BETWEEN 1891 AND 1961 217 



TABLES 



1 Distribution of amplitude U 93 



2 Values of horizontal water particle displacement, N, and 



wave amplitude, U 98 



3 Resonant edge wave parameters 103 



4 Dimensions, periods of fundamental mode, and intensity of 



secondary undulations of inlets of Alaska and British Columbia, 



and of Puget Sound 133 



5 Allowable overtopping heights 162 



6 Drag coefficients 178 



7 Typology of tsunami events 197 



FIGURES 



1 Oceanic zones of recent earthquake activity, showing association 



with trench systems and island arcs 18 



2 Wave height versus tsunami magnitude 23 



3 Principal fault systems and distribution of epicenters of major 



Alaskan earthquakes, 1898-1961 25 



4 Mean annual occurrence of shallow- focus earthquake shocks for 



the Aleutian and southeastern Alaska region 26 



5 Movement along fault lines 28 



6 Wave record from Wake Island, showing arrival of tsunami 29 



7 Horizontal motion normal to continental slope 35 



