Residents of Gaanbaai in the Western Cape were recently surprised by an active blowhole at Danger Point.
The blowhole is a geologic phenomenon where sea caves grow landwards and upwards into vertical shafts and expose themselves towards the surface, resulting in hydraulic compression of seawater that is released through a port from the top of the blowhole. The geometry of the cave and blowhole along with tide levels and swell conditions determine the height of the spray.
The blowhole was photographed by local resident Johan le Roux, who shared an image of the blowhole and the reaction of the locals was both awe and curiosity. Cristo Groenewald commented on the beauty of the sight, and Alta Jooste was amazed at the power of the sea to blow through the earth. Marie De Wet asked what could come from the blowhole and Johan Le Roux replied that it was foam. Rassie Riëtte Erasmus explained that the sea forces the water and foam so that the hole “blows” and Mickey De Beer added that one is never too old to learn something new.
Rassie Riëtte Erasmus then proceeded to explain that when visiting the Lighthouse, there is a pathway down to the rocks, with boards that indicate the Mishoring and Blowhole. This explanation was met with thanks from Kobie Van Dyk, who had no idea of the blowhole’s existence despite living in the area for 17 years. Sonja Reynecke asked for more information and Johan Le Roux responded with an explanation of the phenomenon.
Hendrik Keyser shared his childhood memories of visiting Kruismansbaai, while Kobus De Jager mentioned that the area is good for fishing. Adrie Prinsloo suggested visiting the lighthouse, to which Sydney Edwards added that the lighthouse had been closed but reopened a few weeks ago.
Madeleine Van Wyk Hon, who had stayed in the old cottage there with friends for two years, shared that she had no idea of the blowhole’s existence and asked if it could be seen from the lighthouse grounds. Johan Le Roux responded that it was the easiest place to view it. Cathy Klotz commented on the interesting nature of the blowhole and Cheryl Abrahams expressed her disappointment at not being able to see it for herself. Mara van Zyl asked if her friend Riaan van Zyl had seen it.
The active blowhole at Danger Point has certainly caused some excitement among the residents of Gaanbaai in the Western Cape. It has also prompted some interesting conversations about its formation and accessibility.