Viewing archive of Thursday, 28 August 2014

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2014 Aug 28 1132 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
28 Aug 2014	120	024
29 Aug 2014	118	007
30 Aug 2014	118	014

Bulletin

Only two small C-class flares were observed in the past period. All active regions at the frontside are relatively stable. No Earth directed CMEs were observed. Flaring activity is expected to remain at the level of C-flares. A equatorial coronal hole has crossed the central meridian, which is likely to influence the solar wind conditions near Earth starting on August 30. The magnitude of the interplanetary magnetic field declined from 15 to 9 nT, with Bz mainly being southward. The solar wind speed is fluctuating between 300 and 380 km/s. Geomagnetic activity reached active levels (local K=4 at Dourbes), with even an single time slot of minor storm level (NOAA Kp=5). A return to quiet to unsettled conditions is expected, till the potential arrival of a shock related to the August 25 CMEs later today.

Today's estimated international sunspot number (ISN): 062, based on 10 stations.

Solar indices for 27 Aug 2014

Wolf number Catania	///
10cm solar flux	123
AK Chambon La Forêt	038
AK Wingst	020
Estimated Ap	021
Estimated international sunspot number	069 - Based on 19 stations

Noticeable events summary

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

All times in UTC

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