More of 3,400 concrete buildings in San Francisco, California, are at high risk of collapsing in the event of a major earthquake, according to a preliminary list drawn up by the city government revealed by the NBC news network.
The list, obtained through a public records request, includes famous historic sites, low-income apartments, and company headquarters as well known as the building that houses the offices of Twitter.
This count excludes single-family homes, public schools, and buildings built after the year 2000.
An official from the San Francisco Mayor’s Office quoted by NBC warned that the list is preliminary, so certain constructions could be excluded or added as the investigation develops on the safety of concrete structures advances.
The city has not yet said when it will deliver the final count or when it will send notices to owner-occupiers alerting them to the danger.
The dangerous San Andreas fault
San Francisco, located in the vicinity of the San Andreas fault where the North American and Pacific plates meet, has a 72% chance of experiencing an earthquake of at least magnitude 6.7 on the Richter scale before 2043, according to estimates by the United States Geological Survey.
Both this city and the rest of the state of California have implemented measures to search all buildings.
In 2016, an inspection proved that the Millennium Tower, one of the tallest residential buildings in San Francisco -built in 2009- it was sinking and tilting.
Problems in a 58-story building
Inspectors found that some problems in the foundation of the 58-story building They had sunk it by almost half a meter and had tilted it 35 centimeters to the west, which in addition to generating outrage among the residents of the property. and the nearby area, increased fears about what will happen in the event of an earthquake.
Construction began in 2021 to stabilize the building which has not yet been completed.
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