Death toll of Indonesia's quakes, tsunami climbs to 1,407

He hinted the urgency to get the devices resume operation.

"Should the devices installed at the sea surface be vulnerable on vandalism, we can install them under seabed. We have experts on that," he said.

"A total of 148.4 million people (in Indonesia) settle in quake vulnerable areas, and as many as 3.8 million others live in areas vulnerable on tsunami strike," said Sutopo.

Powerful and shallow earthquakes of 6.0, 7.4 and 6.1 magnitude and a tsunami devastated the province with the hardest-hit area in Palu and adjoining Donggala district last Friday.

The tsunami with the height of 0.5 to 3 meters ravaged coastal areas near Talisa beach in Palu and Donggala district.