Detailed Information

Solar Activity

Solar activity was eruptive in the last 24 hours.

Two C-class flares were observed, while no M-class or X-class flares were observed in the last 24 hours. The strongest event was a C1.0 flare peaking at 4:43UT from an UNKNOWN REGION. Associated with this flare activity, one Type III solar radio burst was detected, while no Type II or Type IV radio bursts were observed. Three coronal mass ejections were detected in the last 24 hours. The western-directed CME observed at 501 kilometers per second with an angular width of 22 degrees, and the eastern CME at 535 kilometers per second with an angular width of 8 degrees. On the visible disk, SDO/HMI identified four active regions: NOAA 14436, NOAA 14439, NOAA 14441, and NOAA 14443. Additionally, two H-Alpha plages were observed by BBSO: NOAA 14440 and NOAA 14442. No farside regions were observed returning to the visible disk.

Based on today's condition, solar activity for the next 24 hours 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 655 km/s to 471 km/s, north-south component of interplanetary magnetic field fluctuate between -7.4 nT and 5.2 nT. There were geoeffective coronal holes at central equator and north pole, while the others at eastern equator, south-east, north pole and central equator were not geoeffective.

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

Ionospheric Activity

Ionosphere was in Moderate conditions for the last 24 hours.

There was depression of foF2 lower than 30% of its median value for 225 minutes for last 24 hours. There was increment of fmin more than 30% of its median value for 30 minutes for the last 24 hours. There was no the Spread-F occurred for the last 24 hours. There was the Sporadic-E occurred in the night and daytime for 975 minutes with foEs value exceeded the foF2 for last 24 hours. S4 index values (condition of ionospheric scintillation) was less than 0.5 over Pontianak and maximum TEC was 62.47 over Pontianak.

The ionosphere activity for next 24 hours 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 in the next 24 hours is predicted at a Normal level.

HF Radio Communication

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

The MUF depression for next 24 hours is predicted on Quiet level, due to previous of geomagnetic activity

The SWF on for next 24 hours 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.

The flux of high-energy proton was in quiet level for the last 24 hours.

Based on solar activity prediction, the flux of high-energy proton for the next 24 hours is predicted to be quiet.