Detailed Information

Solar Activity

Solar activity in the past 24 hours was active.

Fifteen solar flares consisting of twelve C-class flares and three M-class flares occurred in the past 24 hours. The strongest was an M3.4 flare peaked at 22:25 UT from NOAA 14493. Two type III solar radio bursts and four CMEs were observed during this period. The west-directed CMEs had the highest median velocity of 365 km/s and an angular width of 90°, while the east-directed CMEs had the highest median velocity of 507 km/s and an angular width of 20°. The latest SDO/HMI intensitygram data show four active regions (NOAA 14489, 14491, 14492, and 14493), while the latest BBSO H-alpha data show one H-alpha plage (NOAA 14490) on the solar disk. The GONG Calibrated Farside Map indicates that no new active region is expected to 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 active.
 

Geomagnetic Activity

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

The solar wind speed increased from 263 km/s to 326 km/s, while the north-south component of the interplanetary magnetic field fluctuated between -3.7 nT and 4.2 nT. There were geoeffective coronal holes at the eastern equator and central equator, while the others at the northwest and south pole were not geoeffective. The CME on 20 July at 09:00 UT was mainly erupted toward the west with the speed of 365 km/s and an angular width of 90°. The CME was geoeffective and is likely to have no impact in the next 24 hours.

A quiet level of geomagnetic activity is expected for the next 24 hours.

Ionospheric Activity

Ionospheric Activity Ionosphere activity for the last 24 hours cannot be evaluated.

The ionospheric activity regarding the foF2, fmin, Spread-F, and E-sporadis values for the last 24 hours cannot be evaluated due to problems with the CADI station. The S4 index values (condition of ionospheric scintillation) was less than 0.5 and the maximum TEC index value was at 57,6 both over Pontianak.

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

Navigation

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

Based on ionospheric scintilation and TEC variation, the probability of error positioning for the next 24 hours is predicted at a normal level.

HF Radio Communication

HF Radio Communication MUF (Maximum Usable Frequency) depression and Short Wave Fadeout (SWF) for the last 24 hours cannot be evaluated due to problems with the Pontianak station.

The MUF depression for the next 24 hours is predicted on quiet level, due to previous geomagnetic activity.

The SWF for the next 24 hours is predicted in minor level due to the prediction of solar flare.

Satellites

The electron flux was at a high 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 in the past 24 hours was quiet.

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