The name Openg was used for nine tropical cyclones in the Philippines by the PAGASA (and its predecessor, the Philippine Weather Bureau) in the Western Pacific Ocean.
The 1973 Pacific typhoon season has no official bounds; it ran year-round in 1973, but most tropical cyclones tend to form in the northwestern Pacific Ocean between June and December. These dates conventionally delimit the period of each year when most tropical cyclones form in the northwestern Pacific Ocean.