SPACE WEATHER INFORMATION AND FORECAST SERVICES

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

Today

Geomagnet

Moderate Storm

Ionosphere

Minor

Forecast

Geomagnet

Quiet

Ionosphere

Moderate

Issued : 2017 May 29 0800 UTC
Forecast Valid For 24 Hours

Detailed Information

Solar Activity

Solar activity is currently on eruptive level. Two C-class flare erupted from NOAA 2659 with maximum flare was C3.3 peaked at 28th May 2017 19:28 UT. Solar activity on 27th and 26th May 2017 was quiet with 17 B-class flare from NOAA 2659. Today observation shows only one active region with spot (NOAA 2659) which is tend to maintain the complexity of its magnetic activity. Two CMEs events were detected in the last 24 hours. Farside observations reveals no active region that will appear in the next 24 hours. 

The solar activity for May, 29th  2017 08 UT is predicted to be eruptive, valid for 24 hours. 

Geomagnetic Activity

Geomagnetic activity on May 26th, 08:00 UT - May 27th, 07:59 UT was on quiet level.

Geomagnetic activity on May 27th, 08:00 UT - May 29th, 07:59 UT was on moderate storm level.

Today's geomagnetic activity (May 29th,2017) was in moderate storm level. Solar wind speed was around 325 km/s to 400 km/s. IMF was varied between -15 to 13 nT. Today's geoeffective coronal holes were around western equator hemisphere, and on the northtern and southern hemisphere were not geoefective. Latest substorm has occurred on May 27th, 2017 at 22 UT with intensity less than 2000 nT and lasts for 22 hours.

Quiet level is expected on the next 24 hours.  

Ionosphere Activity

Ionosphere was in minor conditions for the last 24 hours. There was depression of foF2 lower than 30% from its median for the last 24 for more than 1 hour. There was increment of fmin more than 30% from it's median values. There was no Spread-F event. The Sporadic-E occurred on night time with foEs value was more han foF2 values. W-index mean value was 1 for the last 24 hours . Ionospheric scintillations for the last 24 hours was quiet over Bandung and Biak with S4 index value less than 0.25.

The ionosphere activity for May 29th, 08:00 UT - May 30th, 07:59 UT is predicted to be moderate

Navigation

W-index mean value was 1  (normal) for the last 24 hours .

  • The probability of error positioning for May 29th, 08:00 UT - May 30th, 07:59 UT is slight during daytime and nighttime based on W-index prediction value is going to be -2.

 

HF Radio Communication

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

  • The probability of MUF depression  for May 29th, 08:00 UT - May 30th, 07:59 UT is strong due to previous  and prediction of geomagnetic activity .
  • The probability of SWF  for May 29th, 08:00 UT - May 30th, 07:59 UT is quiet due to prediction of solar flare activities.

 

Satellites

The flux of high energy proton was far below the threshold so that the activity level was quiet in the last 72 hours. The flux of high energy proton for May, 29 2017 08 UT is predicted to be quiet, valid for 24 hours. 

The electron flux was on very high level on May 26th, 08:00 UT - May 27th, 07:59 UT. The electron flux was on low level on May 27th, 08:00 UT - May 29th, 07:59 UT. Low electron flux level is expected in the next 24 hours.