phenomenon

something that exists and can be seen, felt, tasted, etc., especially something which is unusual or interesting ปรากฏการณ์

Now the red-shirt vlillage phenomenon appears to have spread to the central region.

 The recent natural disasters in Japan were unforeseen but, the country wass long known to be at risk to this type of phenomenon.

As the iPhone 4 phenomenon takes hold, manufacturers are starting to show signs of strain.