Back in the early 1990s when I was finishing off my PhD I was given office space in the Unit for Coastal and Estuarine Studies (UCES) at the then University of Wales, Bangor (in Menai Bridge). This unit was a centre for applied (contract) research and was based on a small island (Ynys Faelog) in the Menai Straits that was reached by a causeway. Anyway, sharing the building was a retired professor, Jack Darbyshire, who used to beaver away on his own little projects and delighted in collaring me to talk about one of these (relating to the formation of beach cusps). The primary area that Jack was interested in was microseisms (tiny earthquakes) that are picked up in seismographs. I can’t actually remember what it was about microseisms that interested Jack so much (he wasn’t the easiest person to understand being something of the classic mad scientist with an added very strong north Wales accent) but I was interested to see microseisms pop up again in New Scientist, Issue 2710 [30 May 2009]. Apparently, when ocean waves break they cause the crust to “hum” and they generate microseisms the intensity of which is related to the size of the storm waves. There is now an idea to look back at the extensive seismometer records that go back for almost a century to see whether there are detectable changes in this wave “noise” that can be used to infer changes in storm patterns due to climate change. This is of interest because the seismometer records go back further in time than good wave measuring systems. Perhaps I should have listened to Jack Dervyshire more carefully all those years ago.
Tim O'Hare 