NATM incidents worldwide:

Pans, France, 1973 (collapse)

Pans, France, 1973 (collapse)

Sao Paulo, Brazil, 1981 (sudden instability)

Santana, Brazil, 1983 (cave in)

Landrucken, Germany, 1984 (collapse)

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Bochum, Germany 1984 (collapse) Richtol, Germany, 1984 (collapse) Bochum, Germany, 1985 (collapse) Munich*, Germany, 1985 (collapse)

Kaiserau, Germany, 1985 (collapse)

Krieberg, Germany, 1986 (collapse)

Weltkugel, Germany, 1986 (cave in)

Karawanken, Austria, 1987 (inflow)

Kehrenberg, Germany, 1986 (surface settlement)

Michaels, Germany, 1988 (collapse)

Karawanken, Austria, 1989 (collapse)

Kwachon, South Korea, 1991 (collapse)

Seoul, South Korea, 1991 (collapse)

Funagata, Japan, 1992 (collapse) Seoul, South Korea, 1992 (collapse)

Lambach, Austria, 1992 (collapse) Cliungho, Taiwan, 1993 (collapse) Sao Paolo, Brazil, 1993 (collapse) Poggio, Italy, 1993 (severe deformation)

Carvallo Pinto, Brazil, 1994 (collapse during repairs)

Montemor, Portugal, 1994 (collapse, main bore)

Montemor, Portugal, 1994 (collapse, pilot)

Galgenberg, Austria, 1994 (collapse)

Munich, Germany, 1994 (collapse) Heathrow, England, 1994 (collapse)

In addition, there were five further collapses reported in the construction of tunnels for the Munich metro before 1987 and six more collapses during work on the Seoul metro between 1991 and 1993.