Data Information

Local K-Index
S4
TEC

 

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Local K Index

2021-04-17

GNSS

The S4 Index is a standard index used to measure ionospheric disturbances. It is defined as the ratio of the standard deviation of signal intensity to the average signal intensity.

2021-04-14

TEC

2021-04-14

Daily Brief

Issued By Pussainsa 2021-04-18

Solar Activity / X Ray Flares

Solar activity was quiet for the last 24 hours.
Neither significant flare, CME nor solar radio burst occurred in the last 24 hours. The latest SDO/HMI Intensitygram data shows one active region (NOAA 12814). STEREO EUVI/AIA 195 observation shows no new active region is going to appear from the east limb of the Solar disk in the next 72 hours.
 
Based on today's condition, solar activity for April 16th, 08:00 UT - April 17th, 07:59 UT is predicted to be quiet.
Based on today's condition, solar activity for April 17th, 08:00 UT - April 18th, 07:59 UT is predicted to be quiet.
Based on today's condition, solar activity for April 18th, 08:00 UT - April 19th, 07:59 UT is predicted to be quiet.

Solar Wind / Geomagnetic Activity

The geomagnetic activity was in quiet level for the last 24 hours.
 
The solar wind speed fluctuated from 313 km/s to 431 km/s. The north-south component of the interplanetary magnetic field fluctuated from -3 to 9 nT. There was geoeffective coronal hole at the western equator  while the others at eastern equator and southern equator to south pole were not geoeffective.
 
Quiet level geomagnetic is expected for April 16th, 08:00 UT - April 17th, 07:59 UT.
Quiet level geomagnetic is expected for April 17th, 08:00 UT - April 18th, 07:59 UT.
Quiet level geomagnetic is expected for April 18th, 08:00 UT - April 19th, 07:59 UT.

Ionosphere / Scintillation

The ionosphere was on quiet level for the last 24 hours.
There was no depression of foF2 lower than 30% of its median values. There was increment of fmin more than 30% of its median values for 150 minutes. The Spread-F occured for 75 minutes. Sporadic-E occurred in the night and daytime for 690 minutes. The W-index mean value was -2. The S4 index values (condition of ionospheric scintillation) was more than 0.5 over Pontianak.
 
The ionosphere activity on April 16th, 08:00 UT-April 17th, 07:59 UT is predicted to be minor.  
The ionosphere activity on April 17th, 08:00 UT-April 18th, 07:59 UT is predicted to be quiet.  
The ionosphere activity on April 18th, 08:00 UT-April 19th, 07:59 UT is predicted to be quiet.

Solar Energetic Particles (Protons)

The flux of high-energy proton was quiet for the last 24 hours.  
 
Based on solar activity prediction, the flux of high-energy proton for April 16th, 08:00 UT - April 17th, 07:59 UT is predicted to be quiet.
Based on solar activity prediction, the flux of high-energy proton for April 17th, 08:00 UT - April 18th, 07:59 UT is predicted to be quiet.
Based on solar activity prediction, the flux of high-energy proton for April 18th, 08:00 UT - April 19th, 07:59 UT is predicted to be quiet.