Het archief bekijken van donderdag 30 juli 2020

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2020 Jul 30 1231 UTC

SIDC Prognose

Zonnevlammen

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

Geomagnetisme

Quiet (A<20 and K<4)

Proton Flux monitor

Quiet

	10cm flux	Ap
30 Jul 2020	073	003
31 Jul 2020	074	003
01 Aug 2020	074	005

Bulletin

The solar activity remained at very low levels over the past 24 hours. The two unipolar sunspot regions visible on the disc, namely Catania 37/N0AA-AR 2767, classified as alpha/Hsx, and N0AA-AR 2768, classified as alpha/Axx, remained stable and did not produce any significant flares. The observed X-ray flux remained below B-class level. The solar activity is expected to remain at low levels over the next 24 hours.

No Earth directed Coronal Mass Ejections (CMEs) were observed in the available coronagraph imagery.

The greater than 10 MeV proton flux was at background levels over the past 24 hours and is expected to remain so for the next 24 hours. Over the past 24 hours the greater than 2 MeV electron flux fluctuated between moderate and background levels remaining well below the active threshold. This behaviour is expected to persist over the next 24 hours.

Over the past 24 hours the solar wind conditions remained mostly quiet, based on data from ACE and DSCOVR. The total interplanetary magnetic field varied between 1 nT and 7 nT. The north-south Bz component fluctuated between -7 nT and 4 nT, with highest absolute value at 04:00 UTC today. The Phi angle was rapidly flipping between long-term intervals with positive and negative orientation.

In the past 24 hours the solar wind speed remained relatively stable with small variations between 315 km/s and 380 km/s. The solar wind conditions are expected to remain quiet over the next 24 hours.

A positive polarity northern coronal hole (CH 64) which resided in the north-east quadrant for several days has now crossed the central meridian facing the Earth. An associated HSS emanating from this coronal hole is expected to reach the Earth within the next 3 to 5 days.

A small-amplitude rarefaction wave arrived at Earth around 18 UTC yesterday resulting in a 2 hour period of locally unsettled conditions with K Dourbes index equal to 3. The global geomagnetic conditions remained quiet with maximum Kp-NOAA index equal to 2. The geomagnetic conditions are expected to remain mostly quiet over the next 24 hours.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 020, gebaseerd op 22 stations.

Zon indexen voor 29 Jul 2020

Wolfgetal Catania	///
10cm zonneflux	073
AK Chambon La Forêt	008
AK Wingst	006
Geschatte Ap	004
Geschat internationaal zonnevlekkengetal	020 - Gebaseerd op 33 stations

Overzicht opvallende gebeurtenissen

Aangeboden door het Solar Influences Data Analysis Center© - SIDC - Verwerkt door SpaceWeatherLive

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