Välja antud: 2017 Jun 18 1246 UTC
Quiet conditions (<50% probability of C-class flares)
Active conditions expected (A>=20 or K=4)
Quiet
10cm flux | Ap | |
---|---|---|
18 Jun 2017 | 075 | 019 |
19 Jun 2017 | 074 | 019 |
20 Jun 2017 | 073 | 008 |
Solar activity remains to be low with only one B-class flare reported in the last 24 hours. The B2.5 flare which originated from the Catania sunspot group 33 (NOAA AR 2663) peaked at 09:21 UT on June 18. We might expect isolated B-class flares in the coming hours. No Earth directed CMEs have been observed and the solar protons remained at background level in the past 24 hours.
Starting from about midday of June 17, the solar wind speed began to increase simultaneously with the temperature, and with the density decrease indicating arrival of the fast solar wind associated with two large coronal holes (one on the north and one on the south solar hemisphere) which reached central meridian in the evening of June 14. Although it is difficult to distinguish which of the two coronal holes is associated with present increase of the solar wind speed, it seems more probably that this is the coronal hole on the north solar hemisphere. The solar wind speed is about 590 km/s and the interplanetary magnetic field magnitude is 4nT. The geomagnetic conditions are presently quiet to unsettled, we expect unsettled to active geomagnetic conditions in the coming hours.
Today's estimated international sunspot number (ISN): 031, based on 22 stations.
Wolf number Catania | /// |
10cm solar flux | 075 |
AK Chambon La Forêt | 025 |
AK Wingst | 021 |
Estimated Ap | 020 |
Estimated international sunspot number | 033 - Based on 29 stations |
Day | Begin | Max | Lõpp | Loc | Strength | OP | 10cm | Catania/NOAA | Radio burst types | |
---|---|---|---|---|---|---|---|---|---|---|
Puuduvad |
Provided by the Solar Influences Data analysis Center© - SIDC - Processed by SpaceWeatherLive
Kõik ajad UTC-s
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