The results were striking: The team found that segments of the southeasterly Line A had both the most problems and the highest levels of
differential subsidence.
Not all areas of high
differential subsidence are associated with reported damage or accidents, the researchers found.
Solano - Rojas and his colleagues then correlated their maps of
differential subsidence with the locations of reported track damage and accidents collected from local newspapers, YouTube, and Twitter.
This differential subsidence is the real culprit when it comes to causing track damage and accidents, says Solano - Rojas, because it causes the track to bend and change slope as some sections of track subside more quickly than others.
The researchers also found high levels of
differential subsidence near Oceania Station, the site of the 2015 crash.
Not exact matches
Background
subsidence since 1950 has thus not had a significant effect on events
differential stress accumulation in the shallow crust.