Viewing archive of Thursday, 22 February 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Feb 22 1230 UTC

SIDC Forecast

Valid from 1230 UTC, 22 Feb 2018 until 24 Feb 2018
Solar flares

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

Geomagnetism

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

Solar protons

Quiet

10cm fluxAp
22 Feb 2018068012
23 Feb 2018068012
24 Feb 2018068007

Bulletin

There are no sunspot regions on the visible hemisphere of the Sun and flaring level is very low. The chance for a C flare in the next 24 hours is estimated at 5%.

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.

The solar wind speed (recorded by DSCOVR) varied between about 380 and 430 km/s in the past 24 hours, with current values around 405 km/s. The Interplanetary Magnetic Field (IMF) was directed mainly toward the Sun and its magnitude ranged between about 1 and 10 nT. Bz had excursions below -5 nT between 07:40 and 09:30 UT on February 22. On February 22, 23 and 24 the solar wind is expected to be at nominal levels, possibly with occasional periods of enhanced solar wind as the Earth comes close to the high speed stream associated with the negative polarity south polar coronal hole.

Quiet geomagnetic conditions (K Dourbes between 1 and 2; NOAA Kp between 1 and 2) were registered in the past 24 hours. Quiet to unsettled geomagnetic levels (K Dourbes < 4) are expected on February 22, 23 and 24, with a chance for active intervals (K Dourbes = 4) when the Earth comes close to the high speed stream associated with the negative polarity south polar coronal hole.

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

Solar indices for 21 Feb 2018

Wolf number Catania000
10cm solar flux068
AK Chambon La Forêt008
AK Wingst003
Estimated Ap003
Estimated international sunspot number000 - Based on 30 stations

Noticeable events summary

DayBeginMaxEndLocStrengthOP10cmCatania/NOAARadio burst types
None

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

All times in UTC

<< Go to daily overview page

Latest news

Support SpaceWeatherLive.com!

A lot of people come to SpaceWeatherLive to follow the Sun's activity or if there is aurora to be seen, but with more traffic comes higher server costs. Consider a donation if you enjoy SpaceWeatherLive so we can keep the website online!

Donate SpaceWeatherLive Pro
Support SpaceWeatherLive with our merchandise
Check out our merchandise

Latest alerts

Get instant alerts!

Space weather facts

Last X-flare2025/03/28X1.1
Last M-flare2025/04/01M2.4
Last geomagnetic storm2025/03/27Kp5 (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
February 2025154.6 +17.6
April 2025147 -7.6
Last 30 days128.8 -21.8

This day in history*

Solar flares
12001X28.5
22001X2.01
32001X1.59
42014M9.35
52017M8.22
DstG
11960-272G3
21973-173G3
32001-101G1
41976-101G1
51994-96G3
*since 1994

Social networks