Affichage des archives de dimanche, 16 juillet 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Jul 16 1319 UTC

Prévisions SIDC

Éruptions solaires

C-class flares expected, (probability >=50%)

Géomagnétisme

Minor storm expected (A>=30 or K=5)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
16 Jul 2017	094	032
17 Jul 2017	095	006
18 Jul 2017	096	005

Bulletin

NOAA AR 2665 produced three B and five C-class flares during the past 24 hours. The most intensive flare was C5.8-class flare peaking at 19:36 UT on 15th July. No Earth directed Coronal Mass Ejections (CMEs) have been detected. The integral flux of protons with energy above 10 MeV is still elevated at the level 4 pfu and is expected to decrease further. A coronal mass ejection (CME) of July 14th has arrived today on July 16th at approximately 05:45 UT. A large positive polarity coronal hole will approach geoeffective position in 4 days. More C-class flares are expected tomorrow. Solar wind parameters were very quiet till approximately 05:45 UT today. Then a coronal mass ejection (CME) of July 14th has arrived. Solar wind speed jumped from about 320 km/s to 505 km/s, and total magnetic field strength Bt from 3.5 to 22 nT. Solar wind density jumped from 5/cm^3 till 51/cm^3 and temperature from 1.2* 10^4 K till 3.0*10^5 K. Bz variations increased first from -2/+2 nT till +7/-12 nT and later Bz decreased till -22 nT and remained at this level during 10:00 - 12:00 UT time interval.

Geomagnetic conditions remained at very low levels till 06:00 UT, then Kp increased till Kp = 4 [06-09 UT], Kp = 5 [09-12 UT]. Local index in Dourbes is at K=4 level. We expect geomagnetic conditions to remain at minor storm level for several hours after which it will return to quiet levels. Dst index is expected to go down till -120.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 021, sur la base de 15 stations.

Indices solaires pour 15 Jul 2017

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	092
AK Chambon La Forêt	008
AK Wingst	005
Ap estimé	003
Nombre international de taches solaires estimé	032 - Basé sur 30 stations

Résumé des événements marquants

Données fournies par le Solar Influences Data analysis Center© - SIDC - Traité par SpaceWeatherLive

Toutes les heures sont indiquées en UTC

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