PALU, Indonesia — When rescuers first arrived at the Roa Roa Hotel in central Palu, they could still hear the voices of guests trapped inside, calling out for help, after an earthquake caused the eight-story concrete structure to collapse.

But that was days ago.

Now, in much of the battered city and surrounding areas, there is only silence.

It has been a week since a 7.5-magnitude earthquake and a 20-foot tsunami devastated the Indonesian island of Sulawesi, killing more than 1,400 people in Palu and its vicinity. By Sunday night, Indonesian search and rescue teams at the Roa Roa Hotel were already describing the eerie quiet that had fallen over the rubble.

On Thursday, as rescuers dug their way through the city’s most devastated neighborhoods, there were no urgent calls for aid. It had been days since most rescuers heard a cry for help.