Geomagnetic storm subsiding, expecting more CMEs

Geomagnetic storm subsiding, expecting more CMEs

The first of several CMEs en route to Earth struck our planet's magnetic field on Sept. 9th around 1130UT. The impact sparked a strong (Kp=7) geomagnetic storm, which is now subsiding. Last night Northern Lights were spotted in the United States as far south as WashingtonWisconsinMichigan,VermontMontanaMaine and North Dakota. More geomagnetic activity could be in the offing as one or two more CMEs approach. (SpaceWeather)

Solar wind
speed: 555.8 km/sec
density: 0.7 protons/cm3

The Radio Sun
10.7 cm flux: 112 sfu

Planetary K-index
Now: Kp= 3 quiet
24-hr max: Kp= 5 storm 

A short lived moderate geomagnetic storm took place on Friday due to a incoming CME shock just after 11:00 UTC. Minor storm levels did persist overnight and Aurora was spotted in northern parts of Canada.

Just before 14:00 UTC Saturday, the solar wind jumped from 460 km/s to 520 km/s. Keep an eye on the ACE Spacecraft data for any further increases that may contribute to minor geomagnetic activity. (SolarHam)

NOAA Scales Activity

Range 1 (minor) to 5 (extreme)

NOAA Scale

Geomagnetic Storms *

Solar Radiation Storms

Radio Blackouts

Alerts / Bulletins
Latest Alert: Sep 10 2242 UTC ALERT: Geomagnetic K-index of 5
Last Advisory Bulletin: Sep 06 2344 UTC: Strong Radio Blackout Event

The Farside of the Sun has been very active and late Thursday night a large Solar Flare triggered a bright Coronal Mass Ejection. I created a movie below showing the Flare and CME. This was most likely an X-Class event.


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