a water main had hit a gas line shortly before the explosion. The Richmond, Indiana explosion, on Saturday, April 6, 1968. Two explosions occur in mid-afternoon, in the middle of downtown Richmond, Indiana. The first is caused by a natural gas leak, and the second, by gunpowder and ammunition inside a sporting goods store. 41 people are killed and more than 150 injured. Four square blocks of downtown Richmond, Indiana, are heavily damaged by the explosion or subsequent fire. Ronan Point was a 23-story council tower block in Newham, east London. On 16 May 1968 a gas explosion caused the collapse of a whole corner of the building. Four people were killed in the collapse, with one dying later of injuries. On April 8, 1970, a gas explosion that occurred during construction in Tenjimbashisuji Rokuchōme Station, Osaka Municipal Subway Tanimachi Line, Kita-ku, (formerly Oyodo district) Osaka, Japan, resulted in 79 persons dead, 420 persons injured and 495 houses and buildings burned and destroyed. Clarkston explosion on 21 October 1971; a build-up of gas under a shopping centre left 22 dead and around 100 injured. 23 October 1980, a propane explosion at Escuela Nacional de Marcelino Ugalde (Marcelino Ugalde Primary School), Ortuella, Vizcaya, Spain. According to the local government's official report, 50 schoolchildren and 3 adult were killed and an additional 128 persons injured. 23 May 1984 Abbeystead disaster - an explosion resulting in 16 deaths and 22 injured from Methane entering waterwork pipes. 24 March 1986 Loscoe gas explosion - no fatalities but extensive property destruction, this caused the UK Government to legislate on landfill sites and building practices with regard to landfill gas migration. In July 1988, 167 people died when Occidental Petroleum's Alpha offshore production platform, on the Piper field in the North Sea, exploded after a gas leak. 25 May 1989 - Following the San Bernardino train disaster which had claimed the lives of four people and demolished several houses, a section of the Calnev Pipeline ruptured and exploded after it was damaged by construction equipment clearing the crash site, killing an additional two people and destroying eleven more houses. The 1989 Ufa train disaster was caused by a gas explosion from a leaking pipeline as two trains went by, their sparks igniting the gas. 575 people died. The 1992 explosion in Guadalajara, Mexico's second largest city, took place on April 22, 1992 in the downtown district