The solar activity is still in the minimum phase so that no eruptive events occurred in the past week. There were no active regions observed during the whole week and there will be no eruptive region expected to emerge next week. Solar activity is predicted to be at quiet level for the next week.
Local geomagnetic condition was on active level on November 2nd and 3rd. Maximum local K index of Manado observatory has reached 4. The solar wind’s speed was fluctuated around 390-510 km/s, due to high speed solar wind stream triggered by coronal hole around solar equator, which was on its geoeffective position since October 28th, 2018. The electron flux on radiation was on very high level on November 7th due to the fast stream, then decreased to high level at the end of the week.
Ionosphere conditions in this week were in quiet level to strong level.
There ware depression of foF2 more than 30% from its median that lasted for 6 hours during this week. The foF2 depressions were impacted to the radiowave propagation over the ionosphere which known as the MUF Depression. The minimum frequencies (fmin) of the ionosphere in this week were in quiet condition. There increment of fmin could be a source of disturbance in the HF radio communication which known as the Shortwave Fadeout (SWF) or Radio Blackout (RB). Based on the ionospheric observations using GISTM over Bandung, the scintillation (S4) condition for this week were in quiet to moderate level. The error positioning conditions were in normal level condition that determined by the index W values.
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