Magnetic storms on September 16–17: Geomagnetic activity forecast and K-index level
Geomagnetic activity on Earth in the coming days (photo: Styler)
On Wednesday, September 16, Earth is experiencing increased geomagnetic activity. According to current forecasts, periods of G1 — the lowest category of geomagnetic storms on the NOAA scale — may occur throughout the day. At the same time, activity may remain elevated over the next few days.
RBC-Ukraine explains what is happening with Earth’s geomagnetic field on September 16 and whether a stronger storm is expected.
What is forecast for September 16
According to the U.S. NOAA Space Weather Prediction Center, unsettled and active geomagnetic conditions are expected on September 16, with the possibility of reaching G1 levels at certain times. The cause is said to be the simultaneous influence of fast solar wind from a coronal hole and a plasma cloud associated with a recent coronal mass ejection.
The Kp index is used to assess disturbances in Earth’s magnetic field. According to the NOAA scale, Kp 5 corresponds to G1, Kp 6 to G2, Kp 7 to G3, while the highest G5 level begins at Kp 9.
Therefore, it would be incorrect to call the expected phenomena on September 16 a “powerful geomagnetic storm.” They primarily involve increased geomagnetic activity and possible brief periods of a weak storm.
What will happen on September 17
According to the forecast, geomagnetic activity may also remain elevated the following day. In particular, experts expect activity in some periods to reach the G1 storm level due to the possible arrival of a coronal mass ejection at Earth.
At the same time, space weather forecasts can change after solar material actually reaches Earth. That is why Kp values and storm levels are updated in real time.
Is a G1-level storm dangerous?
G1 is the lowest level on NOAA’s five-level scale. Under these conditions, minor fluctuations in power systems may occur, as well as small impacts on satellite operations. At high latitudes, the likelihood of seeing the aurora may also increase.
Thus, the forecast for September 16 does not indicate an extremely strong geomagnetic event. However, keep in mind that the coming days will still be a period of increased activity, so NOAA will update its forecasts in the near future.
This material is for informational purposes only and should not be used for medical diagnosis or self-treatment. Our goal is to provide readers with accurate information about symptoms, causes, and methods of detecting diseases. RBС-Ukraine is not responsible for any diagnoses that readers may make based on materials from the resource. We do not recommend self-treatment and advise consulting a doctor in case of any health concerns.
