Viewing archive of Friday, 5 July 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2019 Jul 05 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
05 Jul 2019	068	020
06 Jul 2019	068	014
07 Jul 2019	068	007

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 370 km/s until the arrival around 22:25 UT on July 4 of a high speed stream from a small, recurrent, negative polarity equatorial coronal hole that crossed the central meridian on July 1, which caused the solar wind speed to gradually rise from about 345 to 455 km/s, with current values around 420 km/s. The Interplanetary Magnetic Field (IMF) changed direction and is now pointed towards from the Sun. Its magnitude varied between about 1 and 8 nT in the past 24 hours. Bz was never below -5 nT for extended intervals of time. Solar wind conditions are expected to stay enhanced on July 5 and 6.

Quiet geomagnetic conditions (K Dourbes equal to 2; NOAA Kp between 1 and 2) were registered in the past 24 hours. Active intervals (K Dourbes = 4) are possible on July 5 and 6, with a chance for minor geomagnetic storm intervals (K Dourbes = 5). Quiet to unsettled geomagnetic levels (K Dourbes < 4) are expected on July 7.

Today's estimated international sunspot number (ISN): 000, based on 21 stations.

Solar indices for 04 Jul 2019

Wolf number Catania	///
10cm solar flux	068
AK Chambon La Forêt	///
AK Wingst	007
Estimated Ap	006
Estimated international sunspot number	000 - Based on 33 stations

Noticeable events summary

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

All times in UTC

<< Go to daily overview page