Visualizzazione archivio di lunedì, 28 giugno AM

Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2021 Jun 28 1231 UTC

SIDC Forecast

Valid from 1230 UTC, 28 Jun 2021 until 30 Jun 2021
Brillamenti solari

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

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Quiet

10cm fluxAp
28 Jun 2021088007
29 Jun 2021088007
30 Jun 2021088011

Bulletin

Solar X-ray flux remained initially below C level but a C2 flare peaked at 9:35UT from the new region (NOAA active region 2836) that has emerged over the period, just to the South-West of NOAA active region 2835. There is also another region rotating onto the disc in the North East. Overall, C flaring is possible but not very probable.

A Westward CME is seen in SoHO/LASCO coronagraph data from around 4UT June 27 onwards. Its angular width is around 110 degrees. The same CME is visible from STEREO A COR 2 data, as directly Westward from STEREO A perspective. It is most likely associated to a dimming that can be seen just to the West of the disc center between 1-5UT. As a consequence the CME is estimated to be directed only just to the West of the Sun-Earth line and a glancing blow can not be excluded. It is measured to have a rather low speed of between 300-350 km/s and a possible arrival is therefore expected around the afternoon of July 1.

The greater than 10 MeV proton flux was at nominal levels over the past 24 hours and is expected to remain so for the next 24 hours. The greater than 2 MeV electron flux was below the 1000 pfu event threshold. The 24h electron fluence was at normal levels and electron fluence is expected to remain at normal levels during the next days.

Nominal slow Solar wind conditions were observed. Solar wind speed was between 320-380 km/s and total magnetic field remained mostly under 5nT. The magnetic field phi angle indicated that the interplanetary magnetic field is pointing away from the Sun. Solar wind conditions are expected to remain within a nominal slow Solar wind regime until the afternoon of June 30 when an increase may be expected associated with the coronal hole in the northern hemisphere that started transiting central meridian on Jun 27. Late on July 1, a possible glancing blow from the June 27 CME may add to the perturbed conditions.

Geomagnetic conditions were quiet to unsettled (NOAA Kp 0-1, local K Dourbes 1-3). Geomagnetic conditions are expected to remain quiet, then rising to unsettled conditions in the afternoon of June 30.

Today's estimated international sunspot number (ISN): 043, based on 18 stations.

Solar indices for 27 Jun 2021

Wolf number Catania///
10cm solar flux087
AK Chambon La Forêt007
AK Wingst004
Estimated Ap003
Estimated international sunspot number033 - Based on 22 stations

Noticeable events summary

DayBeginMaxFineLocStrengthOP10cmCatania/NOAARadio burst types
Nessuna

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

Tutti gli orari in UTC

<< Vai alla pagina della panoramica giornaliera

Ultime notizie

Supporta SpaceWeatherLive.com!

Molte persone vengono su SpaceWeatherLive per seguire l'attività del Sole o sapere se ci sia la possibilità di vedere l'aurora, ma a maggior traffico corrispondono costi maggiori. Considerate una donazione se vi piace SpaceWeatherLive così che possiamo mantenere online il sito web!

Dona SpaceWeatherLive Pro
Supporta SpaceWeatherLive con il nostro merchandise
Dai un'occhiata al nostro merchandise

Notizie sul meteo spaziale

Ultimo brillamento X2025/03/28X1.1
Ultimo brillamento M2025/04/05M1.0
Ultima tempesta geomagnetica2025/04/06Kp5 (G1)
Giorni senza macchie
Ultimo giorno senza macchie2022/06/08
Media mensile Numero di Macchie Solari
marzo 2025134.2 -20.4
aprile 2025148.7 +14.5
Ultimi 30 giorni132.7 -9.9

Questo giorno nella storia*

Brillamenti solari
12006M1.39
22002M1.38
31997C9.01
42002C8.7
52002C6.29
DstG
12000-292G4
21995-149G4
31977-95G3
41989-85G1
51960-76G1
*dal 1994

Social networks