Shallow M5.7 earthquake hits near Ruteng, Indonesia

A shallow M5.7 earthquake struck near Ruteng, Indonesia, at 02:46 UTC on August 20, 2026. The event occurred approximately 32 km (20 miles) north-northeast of Ruteng at a depth of 10.0 km (6.2 miles), based on data reported by USGS.

The earthquake’s epicenter, located at 120.6°E, 8.4°S, places it in the rugged interior of Flores Island, a seismically active region in eastern Indonesia known for its numerous faults and tectonic complexity. Ruteng and nearby communities are situated in the central highlands of Flores, where towns and villages are scattered amidst mountainous terrain.

Given the inland location, essential infrastructure in the vicinity may include regional highways, local airports, and smaller power distribution facilities that serve Ruteng and neighboring settlements.

There is no tsunami threat associated with this earthquake, based on its location and available data.

The significance index is 500 (on a scale that runs through 1 000), based on magnitude, felt reports, and estimated impact.

Flores and the broader Indonesian region are part of the active tectonic boundary between the Indo-Australian and Eurasian plates. This region frequently experiences significant seismic activity due to the ongoing convergence and subduction processes along the Sunda and Banda arcs.

This information was last updated at 03:03 UTC on August 20, 2026.