Seequent, The Bentley Subsurface Company's GeoStudio Remote Getting Started - August 2026 begins on Aug 5th 2026
Create a free account and view content that fits your specific interests in geotechnical engineering Learn More

On This Day | March 7

Search Events By Day
Month: Day:
2009
Nhat Tân Bridge construction started

The Nhat Tân Bridge is a cable-stayed bridge crossing the Red River in Hanoi. It forms part of a new six-lane highway linking Hanoi and Noi Bai International Airport. Nhat Tan Bridge has a total length of 8.3 kilometres (5.2 mi), including a 3.7 kilometres (2.3 mi) bridge, with 1.5 kilometres (0.93 mi) cable-stayed bridge with five spans crossing the Red River. The bridge is 33.2 metres (109 ft) wide, divided into four lanes for motorized vehicles, two lanes for buses, two lanes for mixed vehicles and pedestrian paths. Each span has 11 pairs of cables. Nhat Tan Bridge was designed and built to become a new icon of the capital, its five towers symbolizing the five ancient gates of Hanoi.

1999
Tehran Metro opened

The Tehran Metro is a rapid transit system serving Tehran, the capital of Iran. It is the largest metro system in the Middle East. It consists of six operational metro lines (and an additional commuter rail line), with construction under way on three lines including west extension of line 4, line 6 and north and east extension line 7. The Tehran Metro carries more than 3 million passengers a day. In 2018, 820 million trips were made on Tehran Metro. As of 2020, the total system was 253.7 kilometers (157.6 mi) long, 186 kilometers (116 mi) of which is metro-grade rail. It is planned to have a length of 430 kilometers (270 mi) with eleven lines once all construction is complete by 2040.

1981
Yerevan Metro opened

The Karen Demirchyan Yerevan Subway, colloquially known as the Yerevan Metro, is a rapid transit system that serves the capital of Armenia, Yerevan. Opened on 7 March 1981, it was the eighth metro system in the former Soviet Union. Unlike most former Soviet rapid transit systems, its stations are not very deep: there are two stations above ground, one sub-surface, and the remaining stations are considered deep-level. The metro runs along 13.4 kilometres (8.3 mi) of track, and currently serves ten active stations.

1927
1927 North Tango earthquake

The 1927 North Tango earthquake occurred in Kyoto Prefecture, Japan on 7 March with a moment magnitude of 7.0. Up to 2,956 people were killed and 7,806 were injured. Almost all the houses in Mineyama (now part of Kyotango) were destroyed as a result. The earthquake was felt as far away as Tokyo and Kagoshima.

Want to read more?

READ MORE

Layered seabed geology changes how subsea cables should be protected

Jul, 07, 2026 | News

The weakest part of a subsea cable route is not always the cable itself. Often, it is the ground mod...

READ MORE

Norwegian tunnelling methods could reshape the Peak District tunnel case

Jul, 14, 2026 | News

A new proposal has revived the long-running idea of a road tunnel beneath the Peak District, aiming...

READ MORE

Second giant TBM begins work on India’s first undersea rail tunnel

Jul, 19, 2026 | News

A second large-diameter tunnel boring machine has started excavation on the Mumbai-Ahmedabad High-Sp...

READ MORE

BGS depth-to-bedrock model strengthens early ground risk screening

Jul, 15, 2026 | News

The British Geological Survey has released Version 8 of its Superficial Deposit Thickness Model, giv...

READ MORE

UPLIFT aims to make deep geothermal energy safer and more predictable

Jul, 21, 2026 | News

A new Horizon Europe project called UPLIFT is targeting one of the most difficult questions in renew...

READ MORE

Geotechnical Earthquake Engineering - A Berkeley Virtual Short Course Series

Jul, 28, 2026 | Event

UC Berkeley faculty does it again! The "Geotechnical Earthquake Engineering" series is offered from...