Viewing archive of Tuesday, 9 July 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2019 Jul 09 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
09 Jul 2019	067	011
10 Jul 2019	066	007
11 Jul 2019	065	007

Bulletin

No active regions visible on the Sun. No flares observed, nor expected.

No Earth directed CMEs in past 24 h. Solar protons have remained at background levels over the past 24 hours.

The solar wind speed is at 460 km/s with interplanetary magnetic field magnitude of 5 nT. A shock in the solar wind was detected on June 8 around 18:30 UT (18:38 UT at SOHO and 18:29 UT at ACE). DSCOVR data seem to be not available, so we are using a combination of ACE and SOHO, since ACE data are not reliable when the density is very low. The magnetic field jumped from 4 to 10 nT and the solar wind speed from 310 km/s to 380 km/s. It was probably associated with the expected arrival of a weak high speed solar wind stream, probably mixed with an ICME (without clear origin yet). Geomagnetic conditions have reached active levels both locally at Dourbes (from 19:00 UT on July 8 until 01:00 UT on July 9) and at planetary levels (for a 3 hours period starting at 18:00 UT). Unsettled to active conditions can be expected in the next 48 h if the high speed solar wind streams develops further.

Today's estimated international sunspot number (ISN): 000, based on 22 stations.

Solar indices for 08 Jul 2019

Wolf number Catania	012
10cm solar flux	067
AK Chambon La Forêt	015
AK Wingst	011
Estimated Ap	010
Estimated international sunspot number	000 - Based on 25 stations

Noticeable events summary

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

All times in UTC

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