NORTH SUMATRA / RankWire.AI / – The recent offshore earthquake near Indonesia’s North Sumatra province resulted in noticeable tremors across multiple regions of Sumatra. The seismic activity, registering a magnitude of 6.1, occurred at 1:02:23 p.m. western Indonesian time, which corresponds to 06:02:23 UTC. Its epicenter was situated approximately 147 kilometers southeast of South Nias Regency, at a depth of 29 kilometers beneath waters west of Sumatra, according to officials.
The BMKG identified the epicenter at 0.65 degrees south latitude and 98.32 degrees east longitude. The agency reported the most intense shaking as intensity IV in North Tapanuli, with tremors reaching several areas in West Sumatra. Places such as Padang, Padang Pariaman, Pariaman, West Pasaman, and Agam experienced shaking between intensity III and IV.
Locations farther from the epicenter also registered lower levels of shaking. Padang Sidempuan, Subulussalam, and South Nias experienced intensity III, while Padang Panjang and Central Tapanuli recorded intensity II to III. Gunungsitoli felt the tremor at intensity II. The BNPB, Indonesia’s National Disaster Mitigation Agency, confirmed that the earthquake did not pose a tsunami threat. Emergency services are actively assessing the affected areas following the seismic event.
No tsunami warning issued after the quake
People in South Nias reported experiencing weak shaking lasting roughly three to five seconds. Local disaster response teams initiated monitoring and conducted assessments in areas where residents felt the tremor. Initial reports from officials did not indicate any fatalities, injuries, or significant structural damage. The authorities continue to gather data from local officials as part of routine post-earthquake evaluations following the offshore seismic activity.
The earthquake affected a wide region, with tremors felt across various parts of western Indonesia. Intensity levels differed by location, with stronger shaking reported nearer to North Sumatra and West Sumatra. No tsunami warning was issued in response to the magnitude 6.1 event. Subsequent official reports confirmed the same magnitude, depth, and offshore location as initially recorded in the aftermath of the quake.
Continued investigations underway in affected zones
On August 18, Indonesia recorded the South Nias earthquake as one of the key seismic incidents. Its offshore epicenter kept the main shock away from major population centers, although residents across multiple districts still felt its impact. Authorities maintain ongoing monitoring in areas that experienced moderate shaking, prioritizing the collection of verified information about local conditions while affirming that the earthquake posed no tsunami danger.
Indonesia faces frequent seismic activity due to its position across several active tectonic boundaries. The event on Tuesday took place west of Sumatra, a region with a well-documented history of earthquakes. Confirmed by officials, the event’s magnitude was 6.1 with a depth of 29 kilometers. The epicenter’s location remained at 147 kilometers southeast of South Nias, and no tsunami threat was identified from this offshore seismic event.