Vaata teisipäev, 27 oktoober 2020 arhiivi

Daily bulletin on solar and geomagnetic activity from the SIDC

Välja antud: 2020 Oct 27 1231 UTC

SIDC Forecast

Valid from 1230 UTC, 27 Oct 2020 until 29 Oct 2020
Päikesepursked ehk loited

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

Geomagnetism

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

Päikese prootonid

Quiet

10cm fluxAp
27 Oct 2020075017
28 Oct 2020076022
29 Oct 2020077017

Bulletin

The new region that emerged south of disk center has been numbered as NOAA AR 2778, it has beta magnetic field configuration. It produced four C-class flares today, the largest was a C4.3 peaking at 06:16 UT. More C-class and possible M-class flares can be expected.

A filament erupted close to central meridian (around N30 in latitude) at 22:00 UT on 26 October. There could be a CME with an Earth directed component, but there is a gap in coronagraph data that hinders its identification. More info will be given when/if the data becomes available.

The greater than 10 MeV proton flux was at background levels over the past 24 hours. It is expected to stay at background levels for the next 24 hours. The greater than 2 MeV electrons are above the 10^3 pfu threshold, as the Earth is still under the influence of a High Speed Stream (HSS) from a coronal hole (CH). The electrons are expected to stay at elevated levels in the next 24 h.

The speed of the solar wind varied between 580 and 510 km/s. The Earth is still inside the HSS from a positive polarity coronal hole. Bz was never below -5 nT and B reached 5 nT. Elevated solar wind speeds are expected for the next 24 hours.

The geomagnetic conditions were up to active levels at planetary index (Kp = 4) and unsettled locally (KDourbes = 3). More active conditions can be expected in the next 48 hours, as the Earth is still under the influence of the HSS.

Today's estimated international sunspot number (ISN): 042, based on 10 stations.

Solar indices for 26 Oct 2020

Wolf number Catania019
10cm solar flux075
AK Chambon La Forêt019
AK Wingst019
Estimated Ap019
Estimated international sunspot number018 - Based on 27 stations

Noticeable events summary

DayBeginMaxLõppLocStrengthOP10cmCatania/NOAARadio burst types
Puuduvad

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

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