Diffraction

a) Diffraction produced by a boat:
Cyprus 
date: 7/7/2007 
coordinates: 34°56'27.21”N, 33°39'17.36”E

b) Diffraction of waves against the end of a protection barrier:
La Grande-Motte, France 
date: 8/21/2006 
coordinates: 43°33'18.71”N, 4°05'20.01”E

Diffraction

a) Wave diffraction through an opening: 
Alexandria of Egypt 
date: 12/14/2010 
coordinates: 31°12'28.56"N;29°53'34.66"E

b) Wave diffraction through an opening:
Théoule-sur-Mer, France 
date: 10/26/2006 
coordinates: 43°31'54.86"N;6 °56'59.41"E

c) Wave diffraction causes circular erosion of the beach: 
Campo di Mare, Italy 
date: 4/18/2010 
coordinates: 40°32'27.33"N;18°04'09.17"E

Interference

a) Interference between wave fronts produced by the wakes of two boats:
River Thames, London, England 
date: 11/06/2006 
coordinates: 51°27'40.79"N;0°16'05.69"E

b) Interference between circular waves coming from two openings: 
Rimini, Italy 
date: 5/28/2002 
coordinates: 44°05'15.02"N;12°32'26.07"E

c) Interference from secondary sources:
Chao Phraya River, Bangkok, Thailand 
date: 8/20/2010 
coordinates: 13°36'40.11"N;100°34'46.60"W

Refraction

a) Wave refraction, as wave fronts approach a beach and bend: 
Villaricos, Spain 
date: 4/26/2002 
coordinates: 37°14'04.59"N;1°47'04.79"E

b) Wave refraction, as wave fronts approach a beach and bend: 
Sardegna, Italy 
8/18/2010 
coordinates: 39°46'12.64"N;8°27'28.82"E

c) Wave refraction, as wave fronts approach a beach and bend: 
Chichiriviche, Venezuela 
date: 4/27/2006 
coordinates: 10°55'29.88"N;68°15'26.93"W