Survivors have told harrowing tales of rocks tumbling onto roadways, trapping them in tunnels until rescuers arrived to free them. In the city of Hualien, a building left tilting over a street at a precarious angle was being carefully torn down.
The relatively low number of deaths from such a powerful quake has been attributed to strict construction standards and widespread public education campaigns on the earthquake-prone island.
A magnitude 7.7 earthquake that struck in 1999 killed 2400 people.
The two dead and four missing on Shakadang Trail include a family of five. The trapped bodies found on Friday were a man and a woman, but they have not been identified, according to Taiwanese media reports.