Viewing archive of Tuesday, 7 May 2013

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2013 May 07 1246 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
07 May 2013	127	012
08 May 2013	125	010
09 May 2013	125	007

Bulletin

Solar activity has been eruptive during the past 24 hours, featuring three C flares from NOAA AR 11731, 11734 and new region 11736. More C-level flares are expected within the next 48 hours, with a slight chance for an M flare. In the last 24 hours, the IMF has decreased from 14 to 6 nT, probably due to the influence of a coronal hole high speed stream. Solar wind speeds have ranged between about 460 and 540 km/s, and currently lie around 520 km/s. Bz has been mainly positive, hence geomagnetic activity has been at quiet levels (K Dourbes between 2 and 3; NOAA Kp between 2 and 3) during the past 24 hours. Quiet geomagnetic conditions (K Dourbes < 4) are expected for May 7 to 9.

Today's estimated international sunspot number (ISN): 078, based on 16 stations.

Solar indices for 06 May 2013

Wolf number Catania	///
10cm solar flux	131
AK Chambon La Forêt	015
AK Wingst	012
Estimated Ap	010
Estimated international sunspot number	078 - Based on 23 stations

Noticeable events summary

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

All times in UTC

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