High Quality Content by WIKIPEDIA articles! Typhoon Ruby (international designation: 8824, JTWC designation: 23W, PAGASA name: Unsang) was a Category 4 typhoon that caused over 300 deaths and billions of dollars in damages. It was the deadliest and costliest storm of the season. The tenth typhoon of the 1988 Pacific typhoon season, Ruby formed from an area of low pressure east of the Philippines on October 20. It intensified to a 230 km/h (145 mph) typhoon while approaching central Luzon. It hit the island on the October 24, and rapidly weakened to a minimal typhoon over the island. Ruby, with its disrupted circulation, remained weak over the South China Sea, and land interaction with Vietnam caused it to dissipate on October 28.