What is 1976 Tangshan earthquake?
{{Infobox earthquake|map=1976 Tangshan.png|magnitude=|landslide=|tsunami=|pgv=|pga=|damages=|affected=|type=|name=1976 Tangshan earthquake|duration=|aftershocks=|anss-url=|isc-event=|map2=|map_caption=|map_alt=|caption=|alt=|image=|foreshocks=|fault=|title=1976 Tangshan earthquake<br/>唐山大地震|local-date=28 July 1976|tags=yes|timestamp=doublet|timestamp-A=1976-07-27 19:42:55|timestamp-B=1976-07-28 10:45:36|isc-event-A=711732|isc-event-B=711773|anss-url-A=usp0000hjg|anss-url-B=usp0000hk6|local-time=Peking time:|damage=[[renminbi|CNY]] 10 billion|local-time-A=03:43|local-time-B=18:45|magnitude-A=7.6 {{m|w|link=y}}; 7.6 {{m|s|link=y}}|magnitude-B=7.0 {{M|w|link=y}}; 7.4 {{m|s|link=y}}|depth=A: 12.2&nbsp;km<br />B: 16.7&nbsp;km|location={{Coord|39.63|N|118.10|E}}<br>{{Coord|39.72|N|118.44|E}}|countries affected=[[Hebei]] Province, [[People's Republic of China]]|intensity=[[:en:Modified Mercalli intensity scale|XI (''Catastrophe'')]]|casualties=242,419|citations=}} The '''1976 Tangshan earthquake''' ({{Lang-zh|c=唐山大地震}}) was a [[natural disaster]] resulting from a [[Seismic magnitude scales|magnitude]] 7.6 [[earthquake]] that hit the region around [[Tangshan]], [[Hebei]], [[People's Republic of China]] on 28 July 1976. It lasted for 23 seconds and levelled 90 percent of Tangshan’s buildings. The earthquake came during the heat of midsummer, and many stunned survivors crawled out of their ruined houses naked, covered only in dust and blood. The earthquake started fires and ignited [[explosive]]s and poisonous gases in Tangshan’s factories. Water and electricity were cut off, and rail and road access to the city was destroyed.<ref>{{Cite web|last1=Huixian|first1=Liu|last2=Housner|first2=George W.|last3=Lili|first3=Xie|last4=Duxin|first4=He|date=2002-01-01|title=The Great Tangshan Earthquake of 1976|url=https://resolver.caltech.edu/CaltechEERL:EERL.2002.001|access-date=2021-07-08|website=resolver.caltech.edu|language=en}}</ref> It is the deadliest earthquake in China and one of the deadliest earthquakes in the [[world]] and