Strong M6.6 earthquake hits Java, Indonesia
A strong earthquake registered by the USGS as M6.6 hit Java, Indonesia at 21:23 UTC on September 11, 2026 (04:23 LT on September 12). The agency is reporting a depth of 358 km (223 miles). EMSC is reporting the same magnitude and depth.
Epicenter of M6.6 earthquake in Java, Indonesia on September 11, 2026. Credit: TW/SAM, Google
The epicenter was located 115 km (70 miles) NNE of Teluknaga (population 128 275), 120 km (75 miles) NNE of Sepatan (population 118 439), 125 km (75 miles) NNE of Tangerang (population 1 911 914), 125 km (80 miles) N of Jakarta (population 8 540 121), and 140 km (90 miles) NE of Serang (population 692 101), Indonesia.
91 000 people are estimated to have felt light shaking and 355 000 weak.
There is no tsunami threat from this earthquake.
The USGS issued a Green alert for shaking-related fatalities and economic losses. There is a low likelihood of casualties and damage. Overall, the population in this region resides in structures that are vulnerable to earthquake shaking, though resistant structures exist.
The predominant vulnerable building types are unreinforced brick with concrete floor and precast concrete frame with wall construction. Recent earthquakes in this area have caused secondary hazards such as landslides that might have contributed to losses.
Estimated population exposure to earthquake shaking
Selected cities exposed
Regional seismicity
References:
1 M6.6 earthquake Java, Indonesia – USGS – September 11, 2026
2 M6.6 earthquake Java, Indonesia – EMSC – September 11, 2026
Teo Blašković founded The Watchers in 2011 and edited it until 2026, covering seismic and volcanic activity, extreme weather, space weather and near-Earth objects. Articles on this page are his archive.
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