SPACE WEATHER INFORMATION AND FORECAST SERVICES

Space Science Center
National Institute of Aeronautics and Space
LAPAN - Indonesia

2018 Feb 23

Geomagnet

Quiet

Ionosphere

Quiet

Forecast

Geomagnet

Quiet

Ionosphere

Quiet

Issued : 2018 February 24 0800 UTC
Forecast Valid For 24 Hours

Detailed Information

Solar Activity

Solar activity was in quiet level. In the last 24 hours, there was no flare and solar radio burst event detected. Today's observation from SDO HMI Intensitygram shows the spotless sun. According to SOHO/LASCO observations, no CME event detected in the last 24 hours, while based on STEREO EUVI/AIA195 observations, no new active region is predicted to appear from the east solar limb in the next 24 hours. 

Based on today's condition,

  • the solar activity on February 23, 2018, is predicted to remain quiet, valid for the next 24 hours.
  • the solar activity on February 24, 2018, is predicted to remain quiet, valid for the next 24 hours.
  • the solar activity on February 25, 2018, is predicted to remain quiet, valid for the next 24 hours.                                                                                                                                                                                                                                                                                                                                                                                      

Geomagnetic Activity

In the last 24 hours, geomagnetic activity was on the quiet level.

Today's geomagnetic activity was on quiet level. Solar wind speed was increased from 380 km/s to 510 km/s. IMF was varied between -9 to 7 nT. Today's coronal holes at southwestern and south pole elongated to equator were geoeffective while another one  at north pole was not. The latest substorm occured on February 22th 2018 at 10 UT with intensity less than 1000 nT and has taken 13 hours of duration.

  • Quiet level is expected on February 22th, 08:00 UT - February 23th, 07:59 UT.
  • Quiet level is expected on February 23th, 08:00 UT - February 24th, 07:59 UT.
  • Active level is expected on February 24th, 08:00 UT - February 25th, 07:59 UT. 

Ionosphere Activity

Ionosphere was in quiet conditions for the last 24 hours.

There was no depression of foF2 lower than 30% from its median values. There was no increment of fmin more than 30% of its median values. The Spread-F event occured for almost 2 hours and 45 minutes. The Sporadic-E occurred in daytime and nighttime with foEs value was more than foF2. The W-index mean value was 1. Ionospheric scintillation for the last 24 hours over Bandung was quiet with S4 index value less than 0.25.

  • The ionosphere activity for February 23th, 2018 08:00 UT - February 24th, 2018 07:59 UT is predicted to be quiet.
  • The ionosphere activity for February 24th, 2018 08:00 UT - February 25th, 2018 07:59 UT is predicted to be quiet.
  • The ionosphere activity for February 25th, 2018 08:00 UT - February 26th, 2018 07:59 UT is predicted to be quiet.

Navigation

The Error positioning was normal for the last 24 hours based on the W-index value.

  • The probability of error positioning for February 23th 2018 08:00 UT - February 24th 2018 07:59 UT is normal during daytime and nighttime based on W-index value that going to be -1.
  • The probability of error positioning for February 24th, 2018 08:00 UT - February 25th 2018 07:59 UT is normal during daytime and nighttime based on W-index value that going to be -1.
  • The probability of error positioning for February 25th, 2018 08:00 UT - February 26h, 2018 07:59 UT is slight during daytime and nighttime based on W-index value that going to be -2.

HF Radio Communication

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

  • The probability of MUF depression for February 23th, 2018 08:00 UT - February 24th, 2018 07:59 UT is quiet due to previous and prediction of geomagnetic activity.
  • The probability of SWF for February 23th, 2018 08:00 UT - February 24th, 2018 07:59 UT is quiet due to the prediction of solar flare activities.
  • The probability of MUF depression for February 24th, 2018 08:00 UT - February 25th, 2018 07:59 UT is quiet due to previous and prediction of geomagnetic activity.
  • The probability of SWF for February 24th, 2018 08:00 UT - February 25th, 2018 07:59 UT is quiet due to the prediction of solar flare activities.
  • The probability of MUF depression for February 25th, 2018 08:00 UT - February 26th, 2018 07:59 UT is quiet due to previous and prediction of geomagnetic activity.
  • The probability of SWF for February 25th, 2018 08:00 UT - February 26th, 2018 07:59 UT is quiet due to the prediction of solar flare activities.

Satellites

In the last 24 hours electron flux was around 1000 [particles/cm2/sec/sr] or in high level. 

  • Low electron flux is expected on February 22th, 08:00 UT - February 23th, 07:59 UT.   
  • Low electron flux is expected on February 23th, 08:00 UT - February 24th, 07:59 UT.
  • Low electron flux is expected on February 24th, 08:00 UT - February 25th, 07:59 UT.   

Within the last 24 hours, the flux of high-energy proton is in the quiet level due to low solar activity. 

  • On February 23, 2018, the flux of high-energy proton is predicted to remain at the quiet level, valid for 24 hours.                                                                                                           
  • On February 24, 2018, the flux of high-energy proton is predicted to remain at the quiet level, valid for 24 hours.                                                                                                         
  • On February 25, 2018, the flux of high-energy proton is predicted to remain at the quiet level, valid for 24 hours.