Viewing archive of Friday, 31 March 2017

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2017 Mar 31 1256 UTC

SIDC Forecast

Solar flares

Quiet conditions (<50% probability of C-class flares)

Geomagnetism

Minor storm expected (A>=30 or K=5)

Solar protons

Quiet

	10cm flux	Ap
31 Mar 2017	084	035
01 Apr 2017	083	013
02 Apr 2017	082	008

Bulletin

Over the past 24 hours solar activity has been low. There have been seven B-flares flares originated at NOAA AR 2644 (McIntosh: Eso; Mag.Type: Beta), AR 2645 (McIntosh: Dki; Mag.Type: Beta). The biggest flare B5.0 peaked today (31-Mar-2017) at 03:46 UT. No Earth-directed CMEs have been detected over the past 24 hours. Solar protons have remained at background levels over the past 24 hours. Solar X-Ray background level is expected to remain low. NOAA AR 2645 and AR 2644 are expected to produce more B-class flares over the next 24 hours. C-class flares are also not excluded. NOAA AR 2645 has a small chance to produce M-class flare. Solar wind parameters remained enhanced. Total Interplanetary Magnetic field remained stable varying from 4 to 6.5 nT. Bz variations increased slightly (varying mostly between -6.1 nT to +6 nT). Over the past 24 hours, solar wind speed measured by DSCOVR increased from about 630 km/s to 730 km/s. Solar wind speed is expected to remain at high levels under CH HSS regime. The geomagnetic field was from unsettled to minor storm levels during the past 24 hours (K Dourbes between 2 and 4; NOAA Kp between 3 and 5). NOAA Kp index reached minor storm levels (Kp=5) at 21:00 UT yesterday, at 09:00 UT today (31-03-2017) Kp index returned to active conditions (Kp=4). The geomagnetic field is expected to continue at active levels for the next two days with few episodes of minor storming (Kp=5) in response to the agitated solar wind conditions.

Today's estimated international sunspot number (ISN): 059, based on 22 stations.

Solar indices for 30 Mar 2017

Wolf number Catania	053
10cm solar flux	086
AK Chambon La Forêt	035
AK Wingst	027
Estimated Ap	026
Estimated international sunspot number	047 - Based on 36 stations

Noticeable events summary

Provided by the Solar Influences Data analysis Center© - SIDC - Processed by SpaceWeatherLive

All times in UTC

<< Go to daily overview page