Last Week's Space Weather Brief

July 31-August 6, 2017

Solar magnetogram

GOES 15 X ray Flux

Solar wind speed

KP disturbance levels

Interplanetary Magnetic Field Bz

• Solar activity was at low levels within the last week.

• Two active regions 12669 and 12670 were visible on August 3, 2017.

• AR 12669 disappeared on August 4, due to the rotation of the Sun.

• There were only a few B class flares observed during the week and all of them were associated with the AR 12670.

• There were two coronal hole HSS arrivals one on August 1 and the other on August 4.

• The one on August 4 had solar wind speed up to 800 km/s and the IMF Bz was southward with a min value of -17 nT.

• The solar wind speed kept its maximum values during the weekend while the IMF Bz oscillated between -6 and 6 nT.

• Kp index showed a max value of 4 which indicates less than minor geomagnetic storm activity according to NOAA geomagnetic storm scale.

• AE index was between 500 and 1000 nT which indicates moderate substorm levels.