Viewing archive of Sunday, 30 June 2013

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2013 Jun 30 1259 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

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

Solar protons

Quiet

	10cm flux	Ap
30 Jun 2013	102	021
01 Jul 2013	105	030
02 Jul 2013	107	007

Bulletin

Solar activity has been eruptive during the past 24 hours, featuring two low C flares from NOAA 11778 and NOAA 11781. More C flares are possible within the next 48 hours, with a slight chance for an M flare, especially from NOAA AR 11778, 11780 and 11781. Solar wind density increased around 5:00 UT on June 29, while wind speed and temperature began to rise, marking the arrival of the expected coronal hole high speed stream. Meanwhile, solar wind speed has increased from about 360 km/s to 500 km/s. In the past 24 hours, geomagnetic activity has been at quiet to active levels (K Dourbes between 1 and 4; NOAA Kp between 2 and 4). A rise to minor storm levels is possible on June 30 and the first half of July 1st, due to an expected glancing blow from the CME of 02:00 UT on June 28. Quiet to active levels are likely in the second half of July 1st, and a return to quiet levels is expected on July 2nd.

Today's estimated international sunspot number (ISN): 050, based on 14 stations.

Solar indices for 29 Jun 2013

Wolf number Catania	///
10cm solar flux	100
AK Chambon La Forêt	037
AK Wingst	035
Estimated Ap	048
Estimated international sunspot number	045 - Based on 22 stations

Noticeable events summary

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

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