This photo layout of satellite images provided by DigitalGlobe shows the Petobo neighborhood of Palu, Indonesia, on Aug. 17, prior to the earthquake, left, and on Oct. 1, devastated by the subsequent tusnami, right.

This photo layout of satellite images provided by DigitalGlobe shows the Petobo neighborhood of Palu, Indonesia, on Aug. 17, prior to the earthquake, left, and on Oct. 1, devastated by the subsequent tusnami, right.