Detailed Information

Solar Activity

Solar activity over the past 24 hours was active. 

Two solar flare were observed, one C-class flare and one M-class flare. The strongest event was an M1.9 flare originating from NOAA 14492, peaking at 17:00UT. Associated with this flare activity, two solar radio bursts were detected, consisting of one Type III and one Type IV radio burst; no Type II radio bursts were observed. Four coronal mass ejections were detected, with a western event measured at 802 km/s with an angular width of 18 deg, and an eastern event recorded at 725 km/s with a full halo angular width of 360 degrees. On the visible disk, eight active regions were identified by SDO/HMI, NOAA 14492, NOAA 14494, NOAA 14495, NOAA 14496, NOAA 14498, NOAA 14499, NOAA 14500, and NOAA 14501. Additionally, one H-Alpha plage was observed by BBSO, identified as NOAA 14497. From farside, 1 active region due to emerge from the farside within the next 72 hours. 

Based on today's condition, 
Solar activity for July 31st, 2026 04:00 UT - August 1st, 2026 03:59 UT is predicted to be eruptive.
Solar activity for August 1st, 2026 04:00 UT - August 2nd, 2026 03:59 UT is predicted to be eruptive.
Solar activity for August 2nd, 2026 04:00 UT - August 3rd, 2026 03:59 UT is predicted to be eruptive.
 

Geomagnetic Activity

The geomagnetic activity was on quiet level for the last 24 hours.

The solar wind speed stabled around 347 km/s, north-south component of interplanetary magnetic field fluctuated between -3.6 nT and 2.9 nT. There was geoeffective coronal hole at central equator, while the others at south pole and north pole were not geoeffective. CME on 30 July 2026 17:24 UT was erupted toward west with speed of 802 km/s and angular width of 18°. The CME was geoeffective and is likely to have impact on 09 August 2026.

Quiet level geomagnetic activity is expected for the next 24 hours.
Quiet level geomagnetic activity is expected for 01 August 2026 07UT - 02 August 2026 07UT.
Quiet level geomagnetic activity is expected for 02 August 2026 07UT - 03 August 2026 07UT.

Ionospheric Activity

The ionosphere was on moderate level for the last 24 hours.

There was depression of foF2 lower than 30% of its median value for 225 minutes. There was increment of fmin more than 30% of its median values for 15 minutes. There was no Spread-F layer. There was Sporadic-E for 840 minutes in the night and daytime with foEs value exceeding the foF2 value. The S4 index values (condition of ionospheric scintillation) was on quiet level (S4<0,5) on the last 24 hours over Pontianak. TEC index value was at quiet level (VTEC<125) with value of 63.01TECU over Pontianak on the last 24 hours.

The ionosphere activity on 31 July 2026, 04:00 UT - 1 August 2026, 03:59 UT is predicted to be quiet.

The ionosphere activity on 1 August 2026, 04:00 UT - 2 August 2026, 03:59 UT is predicted to be quiet.

The ionosphere activity on 2 August 2026, 04:00 UT - 3 August 2026, 03:59 UT is predicted to be quiet.

Navigation

Based on TEC and scintilation, the error of the single frequency GPS positioning for  the last 24 hours was in normal level.

Based on ionospheric scintilation and TEC variation, the probability of error positioning on 31 July 2026, 04:00 UT – 1 August 2026, 03:59 UT is predicted at a normal level.

Based on ionospheric scintilation and TEC variation, the probability of error positioning on 1 August 2026, 04:00 UT – 2 August 2026, 03:59 UT is predicted at a normal level.

Based on ionospheric scintilation and TEC variation, the probability of error positioning on 2 August 2026, 04:00 UT - 3 August 2026, 03:59 UT is predicted at a normal level.

HF Radio Communication

MUF Depression was in strong condition and Short Wave Fadeout (SWF) was in quiet for the last 24 hours

The MUF depression on 31 July 2026, 04:00 UT - 1 August 2026, 03:59 UT is predicted at quiet level due to previous of geomagnetic activity.

The MUF depression on 1 August 2026, 04:00 UT - 2 August 2026, 03:59 UT is predicted at quiet level due to previous of geomagnetic activity.

The MUF depression on 2 August 2026, 04:00 UT - 3 August 2026, 03:59 UT is predicted at quiet level due to previous of geomagnetic activity.

The SWF on 31 July 2026, 04:00 UT – 1 August 2026, 03:59 UT is predicted at quiet level due to the prediction of solar flare.

The SWF on 1 August 2026, 04:00 UT - 2 August 2026, 03:59 UT is predicted at quiet level due to the prediction of solar flare.

The SWF on 2 August 2026, 04:00 UT - 3 August 2026, 03:59 UT is predicted at quiet level due to the prediction of solar flare.

Satellites

The electron flux was on low level for the last 24 hours.

Low level of electron flux is expected for the next 24 hours.
Low level of electron flux is expected for 01 August 2026 07UT - 02 August 2026 07UT
Low level of electron flux is expected for 02 August 2026 07UT - 03 August 2026 07UT

The 10 MeV proton flux was a major proton event over the past 24 hours. 

Based on current conditions, 
The proton flux is expected to be an event in progress for July 31st, 2026 04:00 UT - August 1st, 2026 03:59 UT.
The proton flux is expected to be an event in progress for August 1st, 2026 04:00 UT - August 2nd, 2026 03:59 UT.
The proton flux is expected to be an quiet for August 2nd, 2026 04:00 UT - August 3rd, 2026 03:59 UT.