Vaata laupäev, 27 september 2014 arhiivi

Daily bulletin on solar and geomagnetic activity from the SIDC

Välja antud: 2014 Sep 27 1234 UTC

SIDC Forecast

Valid from 1230 UTC, 27 Sep 2014 until 29 Sep 2014
Päikesepursked ehk loited

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

Geomagnetism

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

Päikese prootonid

Quiet

10cm fluxAp
27 Sep 2014173016
28 Sep 2014176013
29 Sep 2014179007

Bulletin

Solar activity has been at low to moderate level. The largest flare occurred during a GOES 15 data gap. From PROBA2/LYRA data it is derived to be of M1 magnitude. Its peak was reported to have occurred at 8:37 UT. The second strongest event was a C7.9 flare originating from NOAA AR 2177 peaking at 16:18 UT. Some further C flares were reported including from regions 2172 and 2173. Further growth was recorded in the main regions at play 2175, 2172 and 2173. The occurrence of M class flares has become quite possible or even likely. No Earth directed CME's were recorded. Solar wind speed decreased slightly from around 460 km/s to around 420 km/s. Total magnetic field was variable mainly within the 5 to 7 nT range. Some periods with dominant negative Bz (peaks to under -6nT) were observed at the start of the reporting period as well as after UT midnight. Geomagnetic conditions were quiet to active (both NOAA Kp and local K Dourbes 2-4). Quiet to active geomagnetic conditions are expected in the first two days with later quiet to unsettled conditions.

Today's estimated international sunspot number (ISN): 109, based on 10 stations.

Solar indices for 26 Sep 2014

Wolf number Catania///
10cm solar flux170
AK Chambon La Forêt028
AK Wingst017
Estimated Ap018
Estimated international sunspot number122 - Based on 14 stations

Noticeable events summary

DayBeginMaxLõppLocStrengthOP10cmCatania/NOAARadio burst types
27083208370840----M1.0--/----

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

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