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On This Day | November 21

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Dongguan International Trade Center 1 construction started

Minying International Trade Center T2 is a supertall skyscraper in Dongguan, Guangdong, China. It has a height of 423 m. Construction began in 2014 and was completed in 2021. The 96 floor tower opened on September 26, 2021, and is the fourteenth-tallest building in China and the tallest building in Dongguan.

2009 Heilongjiang mine explosion

The 2009 Heilongjiang mine explosion was a mining accident that occurred on November 21 2009, near Hegang in the Heilongjiang province, northeastern China, which killed 108 people. A further of 29 people were hospitalised. The explosion occurred in the Xinxing coal mine shortly before dawn, at 02:30 CST, when 528 people were believed to be in the pit. Of these, 420 are believed to have been rescued. The explosion itself, a preliminary investigation concluded, was caused by trapped, pressurised gases underground, caused by poor ventilation in the mine shaft.

Shanghai Tower construction started

Located in in Lujiazui, Pudong, Shanghai, China, Shanghai Tower is the tallest building in China and the world's third-tallest building by height to architectural top. It comprises 128 stories, and has a height of 632 m (2,073 ft). Its tiered construction, designed for high energy efficiency, provides nine separate zones divided between office, retail and leisure use.

2004 Les Saintes earthquake

The 2004 Les Saintes earthquake had a moment magnitude of 6.3 and maximum European macroseismic intensity of VIII (Heavily damaging). The shock was named for Îles des Saintes "Island of the Saints", a group of small islands to the south of Guadeloupe, which is an overseas department of France. Although it occurred near the Lesser Antilles subduction zone, this was an intraplate, normal fault event. It resulted in one death, 13 injuries, and 40 people being made homeless, but the overall damage was considered moderate. A small, nondestructive tsunami was reported.

Baltimore Metro SubwayLink opened

The Metro SubwayLink is a rapid transit line serving Baltimore, Maryland, and its northwestern suburbs, operated by the Maryland Transit Administration. The segment in Downtown Baltimore is underground, while most of the line outside the central city is elevated or at surface grade. In 2022, the line had a ridership of 1,988,300, or about 4,800 per weekday as of the second quarter of 2023. The current system is 15.4 mi (24.8 km) long, consisting of 6.2 mi (10 km) underground, 2.2 mi (3.5 km) elevated, and 7.0 mi (11.3 km) at grade level (with roadways separated). Eight of its 14 stations are underground at depths from 52 ft (16 m) to 112 ft (34 m) below street level. Its elevated stations stand from 25 ft (7.6 m) to 28 ft (8.5 m) above ground.

Verrazzano-Narrows Bridge upper level opened

The Verrazzano-Narrows Bridge is a suspension bridge connecting the New York City boroughs of Staten Island and Brooklyn. It spans the Narrows, a body of water linking the relatively enclosed New York Harbor with Lower New York Bay and the Atlantic Ocean. It is the only fixed crossing of the Narrows. The Verrazzano-Narrows Bridge has a central span of 4,260 feet (1.30 km; 0.81 mi). It was the longest suspension bridge in the world until it was surpassed by the Humber Bridge in the United Kingdom in 1981. The bridge has the 18th-longest main span in the world, as well as the longest in the Americas.

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