Viewing archive of Saturday, 3 May 2014

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2014 May 03 1210 UTC

SIDC Forecast

Valid from 1230 UTC, 03 May 2014 until 05 May 2014
Solar flares

Eruptive (C-class flares expected, probability >=50%)

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

10cm fluxAp
03 May 2014145003
04 May 2014150007
05 May 2014150016

Bulletin

GOES Xray has observed several C-class flares since our last bulletin. They mainly originated from Catania sunspot groups 36 and 37 (NOAA AR 2051 and 2052). Catania sunspot group 36 has grown significantly and now has a beta-gamma-delta magnetic configuration of its photospheric field. The largest flare was a C5.3 flare from Catania sunspot group 36, peaking at 6:08 UT on 3 May. A small CME can be associated with this flare, travelling westward. The current SOHO/COR2 imagery indicate the CME is too narrow to be a partial halo, as such it is not expected to be geo- effective. More C-class flares are expected. There is a moderate chance for an M-class flare. Catania sunspot groups 36 and 37 are the main source candidates. Slow solar wind conditions continue, with current solar wind speed measured by ACE being about 310 km/s. The magnitude of the interplanetary magnetic field was maximally 4 nT. Geomagnetic conditions were quiet and are expected to remain as such till the expected arrival of the slow CME of the UT night of 29-30 April, potentially leading to active conditions from early 5 May.

Today's estimated international sunspot number (ISN): 084, based on 15 stations.

Solar indices for 02 May 2014

Wolf number Catania128
10cm solar flux135
AK Chambon La Forêt004
AK Wingst003
Estimated Ap002
Estimated international sunspot number082 - Based on 21 stations

Noticeable events summary

DayBeginMaxEndLocStrengthOP10cmCatania/NOAARadio burst types
None

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

All times in UTC

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