Jakarta. The Meteorology, Climatology, and Geophysics Agency (BMKG) confirmed that the strong geomagnetic storm sweeping across the globe from Nov. 12 to 14, 2025, has had little to no impact on Indonesia’s infrastructure or daily activities.

Still, BMKG warned of possible minor to moderate disruptions to satellite communications, GPS-based navigation, and high-frequency (HF) radio transmissions in some areas.

Syirojudin, head of BMKG’s Geophysical Potential Team, explained that the storm was triggered by intense solar activity, marked by an X5.1-class solar flare, one of the strongest categories of space weather events.

“This event caused a burst of high-speed plasma and magnetic fields known as a Coronal Mass Ejection (CME) directed toward Earth. Based on data from the NOAA Space Weather Prediction Center (SWPC), the geomagnetic storm reached level G4, or a severe category,” he said on Thursday.

BMKG’s magnetic observatories in Tondano in North Sulawesi, Tuntungan in North Sumatra, and Serang in Banten, detected signs of geomagnetic activity early on Nov. 12, which is expected to last for about three days.

“BMKG confirms that the maximum K-index indicates a strong geomagnetic storm, but its effects in Indonesia remain relatively minor,” Syirojudin said.

According to Syirojudin, Indonesia’s location near the equator provides a natural shield against the storm’s most extreme effects. “The equatorial region has a strong magnetospheric belt, known as the Equatorial Electrojet, which acts as protection from high-energy particles,” he explained.

The agency advised continued real-time monitoring of geomagnetic activity through K and A indices and urged aviation and maritime sectors to prepare backup communication protocols in case of interference.

“There is no need to panic. The Earth’s magnetic field provides strong protection, and the risk to everyday life or power grids in Indonesia is very minimal,” Syirojudin reassured.

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