Просмотр архива за четверг, 2 марта 2017

Daily bulletin on solar and geomagnetic activity from the SIDC

Существующий: 2017 Mar 02 1237 UTC

SIDC Forecast

Солнечные вспышки

Quiet conditions (<50% probability of C-class flares)

Geomagnetism

Active conditions expected (A>=20 or K=4)

Солнечные протоны

Quiet

	10cm flux	Ap
02 Mar 2017	080	022
03 Mar 2017	079	014
04 Mar 2017	078	008

Bulletin

Solar activity has decreased and only one B-class flare was reported during last 24 hours. We can expect B-class flares in the coming hours, while isolated C-class flares are possible but not very probable. No Earth directed Coronal Mass Ejections have been detected, and the solar protons have remained at background level in the past 24 hours.

The Earth is presently inside the fast solar wind with the speed of about 730 km/s. The interplanetary magnetic field magnitude has decreased and it now amounts around 5 nT. Due to the fast solar wind (up to 710 km/s) and long intervals of negative value of the Bz component of the interplanetary magnetic field (down to -8 nT), strongly disturbed geomagnetic conditions were reported this night. The interplanetary K index had the value of K=5 almost constantly for more than 12 hours (only one interval of K=4 was reported during this time), and before the midnight of March 01 an interval of K=6 was reported by NOAA. The local station at Dourbes reported values of K=5. The geomagnetic conditions are presently unsettled to active and we expect them to stay so in the coming hours. The occasional intervals with the K index going up to 5 are still possible.

Today's estimated international sunspot number (ISN): 055, based on 14 stations.

Solar indices for 01 Mar 2017

Wolf number Catania	058
10cm solar flux	081
AK Chambon La Forêt	063
AK Wingst	041
Estimated Ap	041
Estimated international sunspot number	057 - Based on 24 stations

Noticeable events summary

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

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