A magnitude 6.7 earthquake struck just 42 kilometres southeast of the Indonesian city of Palu on Tuesday morning, sending panicked residents fleeing into the streets and reviving deep-seated trauma from the devastating 2018 disaster that levelled the same region. The shallow tremor, originating at a depth of only 10 kilometres on the little-known Sausu Fault, was felt strongly across Central Sulawesi, including in the districts of Sigi, Parigi Moutong, and Poso. Indonesian authorities swiftly confirmed the quake posed no tsunami threat, as its epicentre lay on land, but the psychological shock was immediate: patients at multiple hospitals were rushed outside, some still attached to intravenous drips, while queues of vehicles snaked around petrol stations as families prepared for possible evacuation.

Scattered structural damage was reported across the affected zone. The ceiling of the Sigi regent’s office collapsed, the auditorium at Tadulako University suffered cracks, and at least two hotels in Palu sustained non-structural harm. In Parigi Moutong, fifteen houses were damaged, and landslides severed the road linking Sigi to Napu, complicating access to remote villages. Eight people were injured in Sigi, two of them seriously with fractures and head wounds from falling debris; all were treated at a local hospital. No fatalities had been confirmed by late afternoon, a fact that emergency officials attributed to rapid evacuations and the quake’s inland location, which eliminated the tsunami risk that proved so lethal in 2018.

The seismic sequence was far from over. Within hours, the meteorology agency had logged more than 40 aftershocks, the strongest measuring magnitude 5.2, and warned that further tremors could persist for days. The activity was driven by normal faulting on the Sausu structure, distinct from the Palu-Koro fault that ruptured in 2018, killing thousands and triggering catastrophic liquefaction. That historical shadow loomed large: officials acknowledged the possibility of localised soil liquefaction in sandy, water-saturated areas, though they stressed that conditions were not identical to the 2018 event. A viral video of receding seawater in Palu Bay briefly stoked tsunami fears before the geophysics agency reassured the public that the phenomenon was unrelated to the earthquake’s mechanism.

Viewed from Jakarta, the government’s response appeared swift but underscored the perennial challenge of disaster preparedness in the world’s largest archipelago. The Central Sulawesi governor, who was in the capital for meetings, cancelled his engagements and prepared to return, while local disaster agencies erected emergency tents at hospitals and closed a cracked bridge for inspection. International seismological centres, from the US Geological Survey to the European-Mediterranean Seismological Centre, confirmed the magnitude and shallow depth, noting that such onshore events, while sparing coastal areas from tsunami, can still inflict significant damage on poorly reinforced structures. As aftershocks continued to rattle the region, the focus turned to ensuring that the emergency response held firm and that the psychological scars of 2018 did not deepen into a new humanitarian crisis.