Brazil: Amazon Basin

Tidal Bore Facts

• Height: 1.5 to 4.6 m (up to 6 m)
• Speed: 16 to 24 km/h (up to 35 km/h)
• Up to 16 km wide at the mouth of the Amazon
• Was seen 150 km inland
• Called pororoca (Potuguese for big roar) by the local population

Photos of the tidal bore on the Guama River

Links
http://vmpsun.sdsu.edu/pororocaphotos.html
http://vmpsun.sdsu.edu/pororoca.html
http://www.geocities.com/Athens/Crete/3033/pororoca.htm
http://eco-logic-systems.com/exp_pororoca.htm
http://boreridersclub.tripod.com/Pororoca.html
http://www.tvliberal.com.br/jlm2/materias/1998/04/02geb.htm