The quake triggered strong shaking that lasted more than a minute in Palu, a coastal city of around 400,000 people and the capital of Central Sulawesi province, sending residents and hospital staff into open areas as a precaution.

Hospitals evacuated patients, including some still attached to IV drips, while several buildings sustained visible damage including collapsed roofs, cracked walls and debris scattered across streets, according to accounts from the affected area.

Several aftershocks followed the main tremor, including one measured at magnitude 5.2, prompting continued caution among residents who moved away from buildings and coastal zones amid concerns about possible secondary effects.

Indonesia’s Meteorology, Climatology and Geophysical Agency said there was no tsunami threat following the quake but warned that aftershocks could continue in the region.

The US Geological Survey reported that the earthquake was centered about 43 kilometers east-southeast of Palu at a depth of approximately 10 kilometers, indicating a shallow quake consistent with strong surface shaking.

Local residents described intense tremors and expressed fear due to past disasters, including the 2018 earthquake and tsunami that devastated Palu and surrounding areas, killing more than 4,000 people.

Authorities said assessments of damage and potential casualties were still underway as emergency response teams monitored affected areas and continued safety checks.