One of the various possible designs that has been mentioned involves a project of around 27 km in length with the following sections alternating across land and water : '' ' Possible sections of Sunda Strait Bridge ( illustrative example ) ' '' One of the difficult technical challenges to be considered is the fact that the strait lies in one of the world 's most dangerous earthquake zones . Sumatra is frequently rocked by significant tremors ; more than 170,000 people in Aceh in northern Sumatra were killed when a 9.0-magnitude quake in December 2004 triggered a tsunami . Many active volcanoes lie in the area , including Krakatoa only 40 km away . The best known eruption of Krakatau in 1883 culminated in a series of massive explosions that killed tens of thousands of people
eruption of Krakatau in 1883
1883 eruption of Krakatoa
Sunda Strait Bridge