Last major update issued on November 3, 2005 at 04:00 UTC. The next update will be on Nov.7 (the DXLC board meeting is this weekend).
geomagnetic data - last month (updated daily)]
[Solar wind and electron fluence charts (updated daily)]
[Solar cycles 21-23 (last update October 2, 2005)]
[Solar cycles 1-20]
[Graphical comparison of cycles 21, 22 and 23 (last update October 2, 2005)]
[Graphical comparison of cycles 2, 10, 13, 17, 20 and 23 (last update October 2, 2005)]
[Historical solar and geomagnetic data charts 1954-2004 (last update February 1, 2005)]
[Archived reports (last update November 2, 2005)]
The geomagnetic field was inactive to unsettled on November 2. Solar wind speed ranged between 319 and 597 (all day average 358) km/sec. The high speed stream from CH195 was observed beginning at ACE at 18:30 UTC and solar wind speed has been hovering above 600 km/sec early on Nov.3. The geomagnetic field has been unsettled to active since the arrival of this stream.
Solar flux measured at 20h UTC on 2.8 GHz was 78.0. The planetary
index was 6 (STAR Ap - based on the mean of three hour interval ap
Three hour interval K indices: 11000133 (planetary), 12002233 (Boulder).
The background x-ray flux is at the class A3 level.
At midnight there were 2 spotted regions on the visible solar disk. The solar flare activity level was very low. No C class events were recorded during the day.
Region 10818 was quiet and stable.
Region 10819 decayed slowly and could soon become spotless.
October 31 - November 2: No obvious fully or partly Earth directed CMEs were observed.
history (since late October 2002)
Compare today's report with the situation one solar rotation ago: 28 days ago 27 days ago 26 days ago
A recurrent trans equatorial coronal hole (CH195) was in an Earth facing position on November 1-3.
Processed SOHO/EIT 284 image at 13:06 UTC on November 2. The darkest areas on the solar disk are likely coronal holes.
The geomagnetic field is expected to be quiet to active on November 3-6 due to effects from CH195.
|Coronal holes (1)||Coronal mass ejections (2)||M and X class flares (3)|
1) Effects from a coronal hole could reach Earth
within the next 5 days. When the high speed stream has arrived
the color changes to green.
2) Material from a CME is likely to impact Earth within 96 hours.
3) There is a possibility of either M or X class flares within the next 48 hours.
Green: 0-20% probability, Yellow: 20-60% probability, Red: 60-100% probability.
Long distance low and medium frequency (below 2 MHz) propagation along east-west paths over high and upper middle latitudes is poor. Propagation on long distance northeast-southwest paths is fair. Trans Atlantic propagation conditions are normally monitored every night on 1470 kHz. Dominant stations tonight: Radio Vibración (Venezuela). Propagation was again good to Venezuela with unusually strong signals from 750 RCR, 780 Radio Coro, 850 Radio Fé y Alegria and 890 Radio América.
Compare to the previous day's image.
Data for all numbered solar regions according to the Solar Region Summary provided by NOAA/SEC. Comments are my own, as is the STAR spot count (spots observed at or inside a few hours before midnight) and data for regions not numbered by SEC or where SEC has observed no spots. SEC active region numbers in the table below and in the active region map above are the historic SEC/USAF numbers.
|Active region||Date numbered||SEC
|Location at midnight||Area||Classification||Comment|
|10818||2005.10.29||9||7||S08E06||0040||BXO||classification was CAO at midnight|
|Total spot count:||16||11|
flux at Earth
|International sunspot number||Smoothed sunspot number|
cycle 23 sunspot max.
|2005.05||99.3||42.6||(28.9 predicted, -2.7)|
|2005.06||93.7||39.6||(27.3 predicted, -1.6)|
|2005.07||96.4||39.9||(26.1 predicted, -1.2)|
|2005.08||90.5||36.4||(24.3 predicted, -1.8)|
|2005.09||91.1||22.1||(22.2 predicted, -2.1)|
|2005.10||77.0||8.5||(20.2 predicted, -2.0)|
|2005.11||77.7 (1)||2.3 (2)||(17.8 predicted, -2.4)|
1) Running average based on the daily 20:00 UTC observed solar flux
value at 2800 MHz.
2) Unofficial, accumulated value based on the Boulder (NOAA/SEC) sunspot number. The official international sunspot number is typically 30-50% lower.
This report has been prepared by Jan Alvestad. It is based partly on my own observations and analysis, and partly on data from some of these solar data sources. All time references are to the UTC day. Comments and suggestions are always welcome.