Detailed Information

Solar Activity

Solar activity was observed to be active over the past 24 hours. A total of three solar flares occurred, comprising two C-class events and one M-class event. No X-class flares were observed. The strongest flare was an M2.7 event originating from NOAA 14392, peaking at 12:15UT. Associated with this activity, four solar radio bursts were detected, consisting of three Type III bursts and one Type IV burst. No Type II radio bursts were reported. Additionally, six coronal mass ejections (CMEs) were observed. One CME originating from the western limb exhibited a speed of 242 km/s with an angular width of 112 degrees, while another from the eastern limb showed a speed of 822 km/s and an angular width of 30 degrees.

On the visible disk, SDO/HMI imagery revealed four active regions, identified as NOAA 14392, NOAA 14393, NOAA 14395, and NOAA 14396. BBSO H-Alpha observations indicated the presence of five plages: NOAA 14387, NOAA 14389, NOAA 14390, NOAA 14391, and NOAA 14394. There were no active regions due to return from the farside.

Based on today's condition, solar activity for:

March 17th, 2026 04:00 UT -March 18th, 2026 03:59 UT is predicted to be eruptive.
March 18th, 2026 04:00 UT - March 19th, 2026 03:59 UT is predicted to be eruptive
March 19th, 2026 04:00 UT - March 20th, 2026 03:59 UT is predicted to be eruptive
March 20th, 2026 04:00 UT - March 21st, 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 decrease from 688 km/s to 563 km/s, north-south component of interplanetary magnetic field fluctuate between -4.8 nT and 5.1 nT There were geoeffective coronal holes at south-east and western equator, while the others at south-east and eastern equator were not geoeffective. CME on 16 March 2026 14:24 UT was mainly errupted toward west with speed of 205 km/s and angular width of 32°. The CME was geoeffective and is likely to have not impact until next 7 days.

Quiet level geomagnetic activity is expected for the next 24 hours.
Quiet level geomagnetic activity is expected for 18 March 2026 07UT - 19 March 2026 07UT
Quiet level geomagnetic activity is expected for 19 March 2026 07UT - 20 March 2026 07UT
Quiet level geomagnetic activity is expected for 20 March 2026 07UT - 21 March 2026 07UT
 

Ionospheric Activity

Ionosphere was in quiet conditions for the last 24 hours.

There was no depression of foF2 lower than 30% of its median value. There was increment of fmin more than 30% of its median values for 75 minutes.  The Spread-F occured for 435 minute for the last 24 hours. The Sporadic-E occurred in the night and daytime with foEs value exceeded the foF2 for several times for 600 minutes. The S4 index values (condition of ionospheric scintillation ) was over than 0.8 and the maximum TEC index value was at 84.4 both over Pontianak for the last 24 hours.

The ionosphere activity on March 17th 2026, 04:00 UT - March 18th 2026, 03:59 UT is predicted to be quiet. 

The ionosphere activity on March 18th 2026, 04:00 UT - March 19th 2026, 03:59 UT is predicted to be quiet. 

The ionosphere activity on March 19th 2026, 04:00 UT - March 20th 2026, 03:59 UT is predicted to be quiet. 

The ionosphere activity on March 20th 2026, 04:00 UT - March 21st 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 slight level.

Based on ionospheric scintilation and TEC variation, the probability of error positioning in March 17th 2026, 04:00 UT - March 18th 2026, 03:59 UT is predicted at a normal level.

Based on ionospheric scintilation and TEC variation, the probability of error positioning in March 18th 2026, 04:00 UT - March 19th 2026, 03:59 UT is predicted at a normal level.

Based on ionospheric scintilation and TEC variation, the probability of error positioning in March 19th 2026, 04:00 UT - March 20th 2026, 03:59 UT is predicted at a normal level.

Based on ionospheric scintilation and TEC variation, the probability of error positioning in March 20th 2026, 04:00 UT - March 21st 2026, 03:59 UT is predicted at a normal level.

HF Radio Communication

MUF depression was in quiet condition and Short Wave Fadeout (SWF) was in moderate for the last 24 hours.

 

The MUF depression on March 17th 2026, 04:00 UT - March 18th 2026, 03:59 UT is predicted on quiet level, due to previous of geomagnetic activity.

The MUF depression on March 18th 2026, 04:00 UT - March 19th 2026, 03:59 UT is predicted on quiet level, due to previous of geomagnetic activity.

The MUF depression on March 19th 2026, 04:00 UT - March 20th 2026, 03:59 UT is predicted on quiet level, due to previous of geomagnetic activity.

The MUF depression on March 20th 2026, 04:00 UT - March 21st 2026, 03:59 UT is predicted on quiet level, due to previous of geomagnetic activity.

 

The SWF on March 17th 2026, 04:00 UT - March 18th 2026, 03:59 UT  is predicted in quiet  level  due to the prediction of solar flare.

The SWF on March 18th 2026, 04:00 UT - March 19th 2026, 03:59 UT  is predicted in quiet  level  due to the prediction of solar flare.

The SWF on March 19th 2026, 04:00 UT - March 20th 2026, 03:59 UT  is predicted in quiet  level  due to the prediction of solar flare.

The SWF on March 20th 2026, 04:00 UT - March 21st 2026, 03:59 UT  is predicted in quiet  level  due to the prediction of solar flare.

Satellites

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

High level of electron flux is expected for the next 24 hours.
High level of electron flux is expected for 18 March 2026 07UT - 19 March 2026 07UT
Low level of electron flux is expected for 19 March 2026 07UT - 20 March 2026 07UT
Low level of electron flux is expected for 20 March 2026 07UT - 21 March 2026 07UT
 

The flux of high-energy protons was quiet for the last 24 hours.

Based on today's condition, the flux of high-energy protons for :

March 17th, 2026 04:00 UT -March 18th, 2026 03:59 UT is predicted to be quiet.
March 18th, 2026 04:00 UT - March 19th, 2026 03:59 UT is predicted to be quiet
March 19th, 2026 04:00 UT - March 20th, 2026 03:59 UT is predicted to be quiet.
March 20th, 2026 04:00 UT - March 21st, 2026 03:59 UT is predicted to be quiet.