Viewing archive of Friday, 1 November 2013
Daily bulletin on solar and geomagnetic activity from the SIDC
Issued: 2013 Nov 01 1221 UTC
SIDC Forecast
Solar flares
Eruptive (C-class flares expected, probability >=50%)
Geomagnetism
Quiet (A<20 and K<4)
Solar protons
Quiet
| 10cm flux | Ap | |
|---|---|---|
| 01 Nov 2013 | 140 | 009 |
| 02 Nov 2013 | 140 | 003 |
| 03 Nov 2013 | 140 | 006 |
Bulletin
The sun produced one M and seven C flares during the past 24 hours. Catania sunspot region 18 (NOAA AR 11877) was responsible for the M1.9 flare peaking at 13:51 UT on October 31. Most C flares originated from Catania sunspot region 29 (NOAA AR 11884). During the next 48 hours, more C flaring activity is expected with a slight chance for an M flare, especially from Catania sunspot region 29 (NOAA AR 11884), which retains a beta-gamma-delta configuration of its photospheric magnetic field. LASCO/C2 (at 18:12 UT on October 31) and LASCO/C3 observed a mainly south directed CME, which will at most only produce a glancing blow. Due to the low speed (CACTus estimation 254 km/s), no effect on geomagnetic conditions is expected. Solar wind parameters observed by ACE indicated the arrival of a weak transient at 10:00 UTC on October 31, possibly related to the CME of 15:24 UT on October 28. A slight increase in solar wind speed, temperature and density was measured. The magnitude of the interplanetary magnetic field (IMF) went to 12 nT and is now stable around 5 nT. Current solar wind speed is around 350 km/s. Geomagnetic activity is quiet to unsettled (local K at Dourbes and NOAA Kp between 0 and 3), which is expected to remain so within the next 48 hours.
Today's estimated international sunspot number (ISN): 085, based on 08 stations.Solar indices for 31 Oct 2013
| Wolf number Catania | 138 |
| 10cm solar flux | 143 |
| AK Chambon La Forêt | 013 |
| AK Wingst | 008 |
| Estimated Ap | 007 |
| Estimated international sunspot number | /// - Based on /// stations |
Noticeable events summary
| Day | Begin | Max | End | Loc | Strength | OP | 10cm | Catania/NOAA | Radio burst types |
|---|---|---|---|---|---|---|---|---|---|
| 31 | 1336 | 1351 | 1402 | ---- | M1.9 | 18/1877 |
Provided by the Solar Influences Data analysis Center© - SIDC - Processed by SpaceWeatherLive
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