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Aktuální sluneční data:
Pro
21.srpen 2018 - 12:37 UT(GMT)
Mezinárodní číslo slunečních skvrn :
016
Sluneční záblesky : Quiet conditions (<50% probability of C-class flares)
Geomagnetická situace : Active conditions expected (A>=20 or K=4)
Sluneční protony : Quiet
Komentář : Solar activity continued to be very low with X-ray flux remaining
below B level throughout the period.
Field separation was observed the simple bipolar NOAA active region 2719
inhibiting only a small potential for a possible C flare.
X-ray flux is thus expected to remain below C level.
The filament located around the central meridian between 35 and 50 degrees
North seems to have lifted off around 19:00UT. A possibly related slow
(below 300 km/s) and faint CME front can be detected in SoHO/LASCO C2
images from around 21:12UT. It is directed towards the West and has an
angular extent of around 90 degrees. Due to a datagap in Stereo A COR2 data
there is no more accurate information on the direction of the ejecta.
Given the speed, direction and angular extent of the CME from Earth
perspective no impact on Earth is expected.
Proton flux levels were at background values and are expected to remain so.
Solar wind saw the continued influence of the coronal hole high speed
stream.
Solar wind speed increased before midnight to around 670 km/s before
declining to around 600 km/s currently. Total magnetic field was at
background values of 2-5 nT with a decaying trend.
Solar wind conditions are expected to remain elevated under the influence
of the high speeds from the transequatorial extension of the Southern
polar coronal hole. A shock related to the August 19 CME could potentially
occur within the next 24 hours but any effects should be small within the
already elevated background solar wind conditions.
Geomagnetic conditions saw active periods around 18:00-21:00 UT (both local
K Dourbes and NOAA Kp 4) but were otherwise quiet to unsettled (both local
K Dourbes and NOAA Kp 2-3).
Mainly unsettled geomagnetic conditions are expected but as solar wind
speeds remain elevated and with possible CME related perturbations
arriving, active periods are possible.
Předpověď sluneční aktivity pro období : 30.11.2019 až 6.12.2019
Poslední fotografie ze SOHO / SDO:
Různé barvy snímků prozrazují odlišné vlnové délky - každá
vlnová délka je vyzařována plynem o určité teplotě: oranžová: 80 000 °C,
modrá: 1 000 000 °C, zelená: 1 500 000 °C, hnědá: 2 500 000 °C.
He II/Si XI 30,4 nm
80 000 °C
EIT 304
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Fe IX/X 17,1 nm
1 000 000 °C
EIT 171
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Fe XII 19,5 nm
1 500 000 °C
EIT 195
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Fe XV 28,4 nm
2 500 000 °C
EIT 284
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SDO/HMI Continuum
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SDO/HMI Magnetogram
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LASCO C2
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LASCO C3
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