Viewing archive of Thursday, 4 July 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2019 Jul 04 1230 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

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

Solar protons

Quiet

	10cm flux	Ap
04 Jul 2019	067	006
05 Jul 2019	067	024
06 Jul 2019	067	016

Bulletin

The visible side of the Sun is spotless and did not produce any flares in the past 24 hours. The chance for a C flare in the next 24 hours is estimated at only 1%.

No Earth-directed Coronal Mass Ejections (CMEs) were observed in available coronagraphic imagery.

The greater than 10 MeV proton flux was at nominal levels in the past 24 hours, and is expected to stay at nominal levels in the next 24 hours.

Solar wind speed near Earth as registered by ACE varied between about 320 and 420 km/s in the past 24 hours, with current values around 360 km/s. The Interplanetary Magnetic Field (IMF) was directed away from the Sun and its magnitude varied between about 3 and 7 nT. Bz was never below -5 nT for extended intervals of time. Solar wind conditions are expected to stay nominal until the expected arrival on July 5 of a high speed stream from a small, recurrent, negative polarity equatorial coronal hole that crossed the central meridian on July 1.

Quiet geomagnetic conditions (K Dourbes between 0 and 2; NOAA Kp between 0 and 2) were registered in the past 24 hours. Quiet to unsettled geomagnetic levels (K Dourbes < 4) are expected on July 4. Active intervals (K Dourbes = 4) are possible on July 5 and 6 due to the expected arrival of a high speed stream from a small, recurrent, negative polarity equatorial coronal hole that crossed the central meridian on July 1, with a chance for minor geomagnetic storm intervals (K Dourbes = 5).

Today's estimated international sunspot number (ISN): 000, based on 24 stations.

Solar indices for 03 Jul 2019

Wolf number Catania	///
10cm solar flux	067
AK Chambon La Forêt	007
AK Wingst	///
Estimated Ap	005
Estimated international sunspot number	000 - Based on 31 stations

Noticeable events summary

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

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