Detailed Information

Solar Activity

• Solar activity during 18 September, at 04:00 UT–19 September at 03:59 UT was quiet;
• Solar activity during 19 September at 04:00 UT–20 September at 03:59 UT was eruptive;
• Solar activity during 20 September at 04:00 UT–21 September at 03:59 UT was eruptive.

Three C-class flares occurred in the past 24 hours. The strongest was a C3.7 peaked at 22:34 UT from NOAA 14534. No solar radio bursts nor CMEs were recorded in the past 24 hours. The latest SDO/HMI Intensitygram data shows four active regions (NOAA 14532, 14533, 14534, and 14535), while the latest BBSO H-alpha data reveals one H-alpha plage (NOAA 14531) on the solar disk. GONG Calibrated Farside Map indicates that no new active region will appear on the solar limb in the next 24 hours.

Based on today's conditions, solar activity for the next 24 hours is predicted to be eruptif.

Geomagnetic Activity

• The geomagnetic activity was at quiet level on 18 September at 04:00 UT–19 September at 03:59 UT;
• The geomagnetic activity was at quiet level on 19 September at 04:00 UT–20 September at 03:59 UT;
• The geomagnetic activity was on quiet level for the last 24 hours.

The solar wind speed decreased from 450 km/s to 391 km/s, while the north-south component of the interplanetary magnetic field fluctuated between -4.3 nT and  5.0 nT. There was one geoeffective coronal hole at the western-equator, while the others at the south pole and north ple were not geoeffective. There was no CME detected in the past 24 hours.

Quiet level geomagnetic activity is expected for the next 24 hours.

Ionospheric Activity

Ionosphere was in Quiet level on September 18th, 04:00 UT - September 19th, 03:59 UT.
Ionosphere was in disturbed on Minor level on September 19th, 04:00 UT - September 20th, 03:59 UT.
Ionosphere was in disturbed on Moderate level on September 20th, 04:00 UT - September 21st, 03:59 UT.

There was depression of foF2 lower than 30% of its median values for 30 minutes on September 19th-20th and for 150 minutes on September 20th-21st. There was increment of fmin more than 30% of its median values for 15 minutes, 15 minutes, and 15 minutes for 3 consecutive days. The Spread-F occured for 225 minutes, 210 minutes, and 135 minutes for 3 consecutive days. The Sporadic E layer occured in the night and daytime for 600 minutes, 645 minutes, and 855 minutes with foEs value exceeded the foF2 for 60 minutes, 165 minutes, and 150 minutes for 3 consecutive days. The S4 index values (condition of ionospheric scintillation) was on Moderate (S4 < 0.8) for 3 consecutive days over Agam. The TEC values was on Quiet (VTEC < 125) with maximum value of 64,94 , 64,66 ,dan 66,90 for 3 consecutive days over Agam.

The ionosphere activity for the next 24 hours is predicted to be Quiet.

Navigation

On September 18th, 04:00 UT - September 19th, 03:59 UT, the error of the single frequency GPS positioning was on Slight level.
On September 19th, 04:00 UT - September 20th, 03:59 UT, the error of the single frequency GPS positioning was on Slight level.
On September 20th, 04:00 UT - September 21st, 03:59 UT, the error of the single frequency GPS positioning was on Slight level.

The probability of error positioning for the next 24 hours is predicted to be Slight, based on scintillation and TEC variations.

HF Radio Communication

On September 18th, 04:00 UT - September 19th, 03:59 UT, The MUF(Maximum Usable Frequency) depression was in Quiet condition and the SWF (Short Wave Fadeout) was in Quiet.
On September 19th, 04:00 UT - September 20th, 03:59 UT, The MUF(Maximum Usable Frequency) depression was in Minor condition and the SWF (Short Wave Fadeout) was in Quiet.
On September 20th, 04:00 UT - September 21st, 03:59 UT, The MUF(Maximum Usable Frequency) depression was in Strong condition and the SWF (Short Wave Fadeout) was in Quiet.

The MUF depression for the next 24 hours is predicted to be Quiet, based on prediction of geomagnetic activity.

The SWF for the next 24 hours is predicted to be Quiet, based on prediction of Solar activity.

Satellites

• The electron flux was at a low level on 18 September at 04:00 UT–19 September at 03:59 UT;
• The electron flux was at a low level on 19 September at 04:00 UT–20 September at 03:59 UT;
• The electron flux was at a low level for the last 24 hours.

A low level of electron flux is expected for the next 24 hours.

• The flux of high-energy protons during 18 September, at 04:00 UT–19 September at 03:59 UT was quiet;
• The flux of high-energy protons during 19 September, at 04:00 UT–20 September at 03:59 UT was quiet;
• The flux of high-energy protons during 20 September, at 04:00 UT–21 September at 03:59 UT was quiet.

Based on today's condition, the flux of high-energy proton for the next 24 hours is predicted to be quiet.