On Sunday, December 31, 2017 at 1:04:58 PM UTC, Norman Lynagh wrote:
These waves were videoed a few days ago at Cape Verde. It shows the
power of long-period waves even though the height is relatively modest.
I make the period something like 13-15 seconds
https://twitter.com/twitter/statuses/947449527065305088
--
Norman Lynagh
Tideswell, Derbyshire
303m a.s.l.
https://peakdistrictweather.org
Twitter: @TideswellWeathr
Demonstrates nicely that size isn't everything!
Graham
Penzance