G2 (Moderate) Storm levels were briefly reached on 15 March, 2023, at 1:59 am EDT (0559 UTC). This disturbance was related to ongoing CH HSS (coronal high speed stream) activity and additional responses to CME shock arrival at Earth as a geomagnetic sudden impulse at 12:28 am EDT (0428 UTC). G1 (Minor) storm levels had already been reached by 11:55 pm EDT on 14 March due primarily to CH HSS related responses. The sudden impulse escalated geomagnetic responses and G2 storm levels were reached a few hours later. Additional CMEs are still anticipated to influence Earth later today and on 16 March, and the G1 Watches remain in effect. Continue to visit our website for the latest information, forecasts, and updates.
NOAA Scales mini
HF Radio: Weak or minor degradation of HF radio communication on sunlit side, occasional loss of radio contact.
Navigation: Low-frequency navigation signals degraded for brief intervals.
More about the NOAA Space Weather Scales
Navigation: Low-frequency navigation signals degraded for brief intervals.
G2 (Moderate) Storm Levels Reached 15 March, 2023
G2 (Moderate) Storm Levels Reached 15 March, 2023