Prohlížíte si archiv čtvrtek 12. dubna 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Vydáno: 2018 Apr 12 1232 UTC

SIDC Forecast

Valid from 1230 UTC, 12 Apr 2018 until 14 Apr 2018
Sluneční erupce

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

Geomagnetism

Quiet (A<20 and K<4)

Sluneční protony

Quiet

10cm fluxAp
12 Apr 2018068009
13 Apr 2018067008
14 Apr 2018067007

Bulletin

The solar activity has been quiet over the past 24 hours. The visible solar disc is spotless and no flare has been recorded. Quiet flaring conditions are expected for the next 24-hour period.

No Earth directed Coronal Mass Ejection has been observed. The greater than 10 MeV solar protons flux remained at nominal levels over the past 24 hours and is expected to remain so.

The Earth remains affected by the solar wind connected to the equatorial coronal hole (which has crossed the central meridian on April 05). The solar wind speed has stabilized around 510-530 km/s over the past 24 hours. The total magnetic field strength remained below 5 nT, and the Bz component was fluctuating between -5 and +5 nT. The enhanced solar wind conditions are expected to persist for the next 24-hour period and until the influence of the HSS associated with the coronal hole decay.

Geomagnetic conditions have been unsettled over the past 24 hours: Kp index was observed ranging between 0-3 (NOAA), and local K index between 0-2 (Dourbes) over the past 24 hours. Due to the ongoing enhancement of the solar wind, unsettled geomagnetic conditions are expected, short episode of active geomagnetic conditions cannot be excluded, especially if the total magnetic field strength slightly increased and the Bz component remains negative for long period of time.

Today's estimated international sunspot number (ISN): 007, based on 13 stations.

Solar indices for 11 Apr 2018

Wolf number Catania///
10cm solar flux068
AK Chambon La Forêt013
AK Wingst011
Estimated Ap012
Estimated international sunspot number000 - Based on 27 stations

Noticeable events summary

DayBeginMaxKonecLocStrengthOP10cmCatania/NOAARadio burst types
Žádný

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

Všechny časy v UTC

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