Wuhan Metro opened
Wuhan Metro is a rapid transit system serving the city of Wuhan, Hubei, China. Owned and operated by Wuhan Metro Group Co., Ltd., the network now includes 11 lines, 291 stations, and 460 km (290 mi) of route length. With 1.22 billion annual passengers in 2019, Wuhan Metro is the sixth-busiest rapid transit system in mainland China. There are a number of lines or sections under construction. The government of Wuhan City promised the citizens that at least two lines or sections open every year.
1976 Tangshan earthquake
The 1976 Tangshan earthquake was a Mw 7.6 earthquake that hit the region around Tangshan, Hebei, China, at 3:42 a.m. on 28 July 1976. The maximum intensity of the earthquake was XI (Extreme) on the Mercalli scale. In minutes, 85 percent of the buildings in Tangshan collapsed or were rendered unusable, all services failed, and most of the highway and railway bridges collapsed or were seriously damaged. The official report claimed 242,769 deaths and 164,851 serious injuries in Tangshan, but when taken into account the missing, the injured who later died and the deaths in nearby Beijing and Tianjin, scholars accepted at least 300,000 died, making it the deadliest earthquake in China and among the top disasters in China by death toll.
Santiago Calatrava was born
Santiago Calatrava Valls is a Spanish architect, structural engineer, sculptor and painter, particularly known for his bridges supported by single leaning pylons, and his railway stations, stadiums, and museums, whose sculptural forms often resemble living organisms. His best-known works include the Olympic Sports Complex of Athens, the Milwaukee Art Museum, the Turning Torso tower in Malmö, Sweden, the World Trade Center Transportation Hub in New York City, the Auditorio de Tenerife in Santa Cruz de Tenerife, the Margaret Hunt Hill Bridge in Dallas, Texas, and his largest project, the City of Arts and Sciences and Opera House in his birthplace, Valencia. His architectural firm has offices in New York City, Doha, and Zürich.
Jacques Piccard was born
Jacques Piccard was a Swiss oceanographer and engineer, known for having developed underwater submarines for studying ocean currents. In the Challenger Deep, he and Lt. Don Walsh of the United States Navy were the first people to explore the deepest known part of the world's ocean, and the deepest known location on the surface of Earth's crust, the Mariana Trench, located in the western North Pacific Ocean.
1883 Casamicciola earthquake
The 1883 Casamicciola earthquake , also known as the Ischia earthquake occurred on 28 July at 20:25 local time (Central European Time) on the island of Ischia in the Gulf of Naples in Italy. Although the earthquake had an estimated moment magnitude (Mw) of 4.2-5.5, considered moderate in size, it caused intense ground shaking that was assigned XI (Extreme) on the Modified Mercalli intensity scale. Between 2,313 and 3,100 people lost their lives. The city also suffered great property losses, with 80 percent of all homes destroyed. This earthquake was exceptionally destructive for its magnitude mainly due to its shallow focal depth.
Gaspard Monge died
Gaspard Monge, Comte de Péluse was a French mathematician, commonly presented as the inventor of descriptive geometry, (the mathematical basis of) technical drawing, and the father of differential geometry.
