Achievement / Pencapaian, Engineering / Kejuruteraan, Most / Terpaling, Record, Technology / Teknologi, World Country / Negara 12.262 km lubang paling dalam yang pernah digali, di Rusia pada 1989, dijangka 15 km dicapai pada 1993 tetapi gagal kerana suhu di situ sudah mencecah 182°C January 28, 2024 Mohd Shahrizan Mohd Saad Leave a comment Koba Superdeep Borehole reached 12,262 m in 1989, was expected to reach 15,000 m in 1993 but fail due to unexpected higher temperatur, 180°C in this depth location