Wave Period 1 : The length of time between two successive tsunami wave peaks or troughs. May vary due to complex interference of waves. Is usually measured in minutes
New South Wales Government, NSW State Emergency Service SES, Glossary of Tsunami Safe Terms (and Simple Things you Can Do), State Headquarters, Wollongong, New South Wales NSW, Australia 2015. http://www.tsunamisafe.com.au/glossary-of-terms, (ND/ Tsunami Emr - Brit) {954}