“The South African National Space Agency (SANSA) has confirmed an Earth-directed coronal mass ejection (CME) observed in solar imagery over the past 24 hours. While solar activity remains low overall, SANSA warns that geomagnetic conditions could shift from quiet to active, potentially affecting communication, navigation, and defence systems across South Africa.”
On 15 September 2026, the South African National Space Agency (SANSA) issued a space weather bulletin confirming the detection of an Earth-directed coronal mass ejection (CME). This announcement underscores the critical role of SANSA’s Space Weather Regional Warning Centre, based in Hermanus, in monitoring solar activity and providing early warnings to protect South Africa’s communication, navigation, and defence infrastructure.
What is a CME?
A coronal mass ejection is a massive burst of solar plasma and magnetic fields released from the Sun’s corona. When directed toward Earth, CMEs can interact with the planet’s magnetic field, causing geomagnetic storms. These storms can disrupt satellite operations, GPS navigation, radio communications, and even power grids.
- Solar wind speed today: 408.3 km/s
- Geomagnetic conditions: Quiet to active (Kp = 1–4)
- Sunspot activity: Four regions with simple magnetic configurations
SANSA’s Role in Africa
SANSA operates the only Space Weather Regional Warning Centre in Africa, recognized by the International Space Environment Service (ISES). This makes South Africa a continental leader in monitoring solar phenomena and issuing alerts that safeguard aviation, maritime, and defence operations.
- Key services provided by SANSA:
- Monitoring solar flares and CMEs
- Forecasting geomagnetic conditions
- Providing HF radio frequency predictions
- Supporting defence and aeronautics sectors
Potential Impact on South Africa
Although the CME observed is not classified as severe, SANSA warns that geomagnetic conditions could intensify, leading to:
- Communication disruptions in aviation and maritime sectors
- Navigation errors in GPS-dependent systems
- Satellite anomalies due to increased radiation exposure
- Power grid fluctuations if geomagnetic currents reach significant levels
Global Context
South Africa’s monitoring comes at a time when space weather forecasting is gaining global importance. Nations such as the United States, China, and members of the European Union have invested heavily in space weather infrastructure. SANSA’s participation in this global network ensures Africa is not left behind in preparing for solar-induced disruptions.
Scientific Collaboration
SANSA collaborates with universities and research institutions across South Africa, including Stellenbosch University, Rhodes University, and UKZN, to advance space science. These partnerships strengthen domestic expertise and ensure that South Africa contributes meaningfully to international space weather research.
Public Awareness and Preparedness
SANSA emphasizes the importance of public awareness. By issuing daily bulletins, the agency ensures that industries reliant on communication and navigation systems can prepare for potential disruptions.
- Aviation: Pilots and airlines receive HF frequency predictions.
- Maritime: Ships navigating long distances rely on SANSA’s forecasts.
- Defence: Military operations benefit from early warnings of geomagnetic disturbances.
Looking Ahead
The confirmed CME serves as a reminder of the fragility of Earth’s technological systems in the face of solar activity. SANSA’s proactive monitoring and warnings are vital for South Africa’s resilience. As solar activity is expected to peak in the coming years, SANSA’s role will only grow in importance.
