4 
7.3 North Sea signal from the west 51 
7.3.1 Propagation 51 
7.3.2 Travel times and water levels 53 
7.4 North Sea signal from the north 54 
7.4.1 Propagation 54 
7.4.2 Local water level evolution 57 
7.4.3 Travel Times 59 
7.5 Signal from the north simultaneous with extreme storm surge (including tide and 
external surge) 60 
8 CONCLUSIONS 63 
9 LITERATURE 65 
10 SELECTED WEB PAGES 71 
10.1 Reports and risk assessments 71 
10.2 Databases and catalogues 72 
10.3 Internet pages of research institutions and projects 72 
10.4 Models 73 
10.5 Tsunami - Simulations and benchmark problems 73 
10.6 Waves 74 
ACKNOWLEDGEMENTS 75 
APPENDIX: LIST OF SYMBOLS 76