Detailed Information

Solar Activity

Solar activity in the past 24 hours was eruptive.

Eleven flares consisting of two M-class flares and nine C-class flares occurred in the past 24 hours. The strongest was an M2.0, which peaked at 00:37 UT from NOAA 14043. Two type III solar radio bursts and four CMEs were recorded during this period. The west-directed CME has the highest median velocity of 844 km/s, with an angular width of 64°, while the east-directed CME has the highest median velocity of 304 km/s, with an angular width of 10°. The latest SDO/HMI Intensitygram data show four active regions (NOAA 14030, 14035, 14036, and 14043), while the latest BBSO H-alpha data reveal eight H-alpha plages (NOAA 14033, 14034, 14037, 14038, 14039, 14040, 14041, and 14042) on the solar disk. The GONG Calibrated Farside Map indicates that one active region will appear on the solar limb in the next 96 hours.

Based on today's conditions,

• Solar activity for 27 March, 04:00 UT–28 March, 03:59 UT is predicted to be active;
• Solar activity for 28 March, 04:00 UT–29 March, 03:59 UT is predicted to be eruptive;
• Solar activity for 29 March, 04:00 UT–30 March, 03:59 UT is predicted to be eruptive;
• Solar activity for 30 March, 04:00 UT–31 March, 03:59 UT is predicted to be eruptive.

Geomagnetic Activity

The geomagnetic activity was at a minor storm level for the last 24 hours.

The solar wind speed increases from 344 km/s to 410 km/s, north-south component of the interplanetary magnetic field fluctuates between -9.5 nT and 12.5 nT. There were geoeffective coronal holes at the south pole and northeast.

Moderate storm-level geomagnetic activity is expected for the next 24 hours.
Minor storm level geomagnetic activity is expected for 28 March 2025 04.00UT - 29 March 2025 03:59UT
Quiet level geomagnetic activity is expected for 29 March 2025 04.00UT - 30 March 2025 03:59UT
Quiet level geomagnetic activity is expected for 30 March 2025 04.00UT - 31 March 2025 03:59UT

 

Ionospheric Activity

The ionosphere condition was at a minor level for the last 24 hours.

There was a depression of foF2 lower than 30% of its median value for 60 minutes. There was an increase of fmin more than 30% of its median values for 75 minutes. The Spread-F occurred in the last 24 hours for 165 minutes. The Sporadic-E did not occur in the night and daytime, with the foEs value exceeding the foF2.The S4 index values (condition of ionospheric scintillation) were in strong condition with the S4 index value over 0.8 (S4>0.8) over Pontianak. The TEC index over Pontianak was at a quiet level (VTEC<125) in the last 24 hours.

The ionosphere activity on 27 March 2025, 04:00 UT - 28 March 2025, 03:59 UT is predicted to be minor.

The ionosphere activity on 28 March 2025, 04:00 UT - 29 March 2025, 03:59 UT is predicted to be moderate.

The ionosphere activity on 29 March 2025, 04:00 UT - 30 March 2025, 03:59 UT is predicted to be minor.

The ionosphere activity on 30 March 2025, 04:00 UT - 31 March 2025, 03:59 UT is predicted to be quiet.

Navigation

Based on TEC and scintillation, the error of the single frequency GPS positioning for the last 24 hours was at a slight level.

Based on ionospheric scintillation and TEC variation, the probability of error positioning on 27 March 2025, 04:00 UT - 28 March 2025, 03:59 UT is predicted at a slight level.

Based on ionospheric scintillation and TEC variation, the probability of error positioning on 28 March 2025, 04:00 UT – 29 March 2025, 03:59 UT is predicted at a slight level.

Based on ionospheric scintillation and TEC variation, the probability of error positioning on 29 March 2025, 04:00 UT - 30 March 2025, 03:59 UT is predicted at a slight level.

Based on ionospheric scintillation and TEC variation, the probability of error positioning on 30 March 2025, 04:00 UT - 31 March 2025, 03:59 UT is predicted at a slight level.

HF Radio Communication

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

The MUF depression on 27 March 2025, 04:00 UT - 28 March 2025, 03:59 UT is predicted at a moderate level due to the previous geomagnetic activity.

The MUF depression on 28 March 2025, 04:00 UT - 29 March 2025, 03:59 UT is predicted at a strong level due to the previous geomagnetic activity.

The MUF depression on 29 March 2025, 04:00 UT - 30 March 2025, 03:59 UT is predicted at a moderate level due to the previous geomagnetic activity.

The MUF depression on 30 March 2025, 04:00 UT - 31 March 2025, 03:59 UT is predicted at a quiet level due to the previous geomagnetic activity.

The SWF on 27 March 2025, 04:00 UT - 28 March 2025, 03:59 UT is predicted at a minor level due to the prediction of the solar flare.

The SWF on 28 March 2025, 04:00 UT - 29 March 2025, 03:59 UT is predicted at a quiet level due to the prediction of the solar flare.

The SWF on 29 March 2025, 04:00 UT - 30 March 2025, 03:59 UT is predicted at a quiet level due to the prediction of the solar flare.

The SWF on 30 March 2025, 04:00 UT - 31 March 2025, 03:59 UT is predicted at a quiet level due to the prediction of the solar flare.

Satellites

The electron flux was at a 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 28 March 2025 04:00UT - 29 March 2025 03:59UT
Low level of electron flux is expected for 29 March 2025 04:00UT - 30 March 2025 03:59UT
Low level of electron flux is expected for 30 March 2025 04:00UT - 31 March 2025 03:59UT

The flux of high-energy protons in the past 24 hours was quiet.

Based on today's condition, 

• The flux of high-energy protons for 27 March, 04:00 UT–28 March, 03:59 UT is predicted to be quiet;
• The flux of high-energy protons for 28 March, 04:00 UT–29 March, 03:59 UT is predicted to be quiet;
• The flux of high-energy protons for 29 March, 04:00 UT–30 March, 03:59 UT is predicted to be quiet;
• The flux of high-energy protons for 30 March, 04:00 UT–31 March, 03:59 UT is predicted to be quiet.