6.0 Magnitude Earthquake Jolts East Nusa Tenggara, No Tsunami Threat Reported

On Tuesday, April 21, 2026, a 6.0-magnitude earthquake struck eastern Indonesia, specifically in the East Nusa Tenggara province. The Meteorology, Climatology, and Geophysics Agency (BMKG) confirmed the event occurred at 11:31 a.m. Local time, with the epicenter located 67 kilometers northwest of North Central Timor Regency at a depth of 31 kilometers.

According to BMKG’s official statement, the earthquake posed no tsunami risk. The agency urged the public to remain vigilant for possible aftershocks despite the absence of a tsunami alert.

Tremors Felt Across Multiple Regions

The shaking was reported across several areas in East Nusa Tenggara, with varying intensities measured on the Modified Mercalli Intensity (MMI) scale. The strongest effects were felt in Atambua, where the tremors reached MMI levels III-IV. At this intensity, shaking is noticeable indoors, often likened to the sensation of trucks passing by, and may cause hanging objects to sway, windows and doors to creak, and pottery to break.

In Maumere, the tremors registered at MMI level III, indicating shaking felt inside homes. Lighter tremors, ranging from MMI II-III, were reported in Kupang City, Kupang Regency, Kefamenanu, Malaka, Soe, Lembata, Larantuka, Alor, and Ende. An MMI intensity of II signifies that the tremors were felt by only a few people, particularly those on upper floors of buildings, and may cause delicate suspended objects to swing slightly.

No official reports of casualties or significant structural damage have been issued by authorities as of the time of the reports. BMKG noted that assessments are ongoing and advised residents to stay cautious.

Context: Indonesia’s Seismic Vulnerability

East Nusa Tenggara lies within the Pacific Ring of Fire, a region known for frequent seismic and volcanic activity due to the convergence of major tectonic plates. Indonesia’s position along this volatile zone makes it prone to earthquakes, which occur regularly across its archipelago.

The BMKG continues to monitor seismic activity in the region and provides real-time updates to the public through its official channels.

Key Takeaways

• A 6.0-magnitude earthquake struck East Nusa Tenggara on Tuesday, April 21, 2026.
• The epicenter was located 67 km northwest of North Central Timor at a depth of 31 km.
• BMKG confirmed no tsunami threat following the quake.
• Strongest shaking was felt in Atambua (MMI III-IV); lighter tremors were reported in Maumere, Kupang, and other regional centers.
• No casualties or major structural damage have been reported.
• The public is advised to remain alert for possible aftershocks.