Daily Archives: January 8, 2014

The Sun Online and solar activity. January 8, 2014

An asymmetric halo CME was observed by SOHO/LASCO-C2 with first measurement at 18:24 UTC. The main direction of propagation is to the southwest. The event was also observed in SOHO/LASCO-C3, STEREO A/COR2  and (partly in) STEREO B/COR2 imagery data. Based on time/height measurements of SOHO/LASCO data the initial CME speed is estimated at 2353 km/s. Analyses based on stereoscopy provide an estimate of around 1900 km/s. Using the drag-based
propagation model (DBM) with a different speed values at 20 solar radii of 1800 to 2300 km/s, the arrival time of this CME is estimated on January 9 between 2:00 and 7:00 UTC.

In addition, also four C flares and one M flare occurred during the past 24 hours. Besides Catania sunspot region 98 (NOAA AR 1944), also Catania sunspot region 94 (NOAA AR 1947) was responsible for this flaring activity. On January 8 an M3.6 flare erupted from Catania sunspot region 94, peaking
at 3:47 UTC. This event was associated with a narrow CME with first measurement in SOHO/LASCO-C2 at 4:36 UTC, which is not expected to be geo-effective. The event was combined with a metric type II radio burst with an estimated shock speed of 697 km/s (estimate from Learmonth).

The second proton event of this week is still in progress. Very high proton flux values were reached; with a maximum of about 950 sfu for >10MeV protons; near 50 sfu for >50MeV protons and near 4 sfu for >100MeV, during the past few hours.

The likelihood for more flares during the next 48 hours remains high; 99% for C flares, 75% for M flares and 50% for X flares. The proton flux is expected to further decline, but may rise again in case of more M or X  flares. A shock in the solar wind data was observed on January 7 around 14:20 UTC.
Solar wind speed, density and temperature show an abrupt increase, as well as the magnitude
of the interplanetary magnetic field. The solar wind speed reached a value of 450 km/s, then was declining and currently has a value of 350 km/s. The magnitude of the interplanetary magnetic field has
achieved a maximum value of 9 nT. The Bz-component is fluctuating between -8 and +4
nT. The shock is probably related to the arrival of the CME that erupted on January 4 at 21:25 UTC. The estimated NOAA Kp reached a maximum value of 3. Minor to severe storm (K=5 to 8) conditions are expected, due to arrival of the above mentioned CME of January 7. Aurorae might be seen at higher latitudes on January 9 until the morning of January 10 under clear sky conditions.

Equipment: Coronado 90 + SBIG 8300s + LX75
Processing: Photoshop
Date: 01/08/14
Time UT: 15:00
Exposure 0.8 sec.

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Sunspot at Sunset

Image Credit & Copyright: Jürg Alean

Sunsets may be the most watched celestial event, but lately sunsets have even offered something extra. A sunspot so large it was visible to the naked eye is captured in Swiss skies in this sunset scene from January 5, crossing left to right near the center of a solar disk dimmed and distorted by Earth’s dense atmosphere. Detailed views reveal a large solar active region composed of sunspots, some larger than planet Earth itself. Cataloged as active region AR 1944, on January 7 it produced a substantial solar flare and a coronal mass ejection (CME) forecast to reach Earth. The CME could trigger geomagnetic storms and aurora on January 9.

NASA APOD 08-Jan-14


NGC 2035 NGC 2014 end NGC 2020 in constellation Dorado

6f02adf832de1a781eb89b8eece17ccf.1824x0_q100_watermark_watermark_opacity-5_watermark_position-6_watermark_text-Copyright Alistair S
Imaging telescopes or lenses: Home made 10inch Serrurier Truss
Imaging cameras: SBIG STF8000M STF8000M
Mounts: Skywatcher NEQ6 Pro NEQ 6 PRO
Software: Cyanogen Maxim DL, Startools
Filters: Baader Planetarium O3 8.5nm 36mm, Baader Planetarium S2 8nm 36mm, Baader Planetarium Ha 7nm 36mm
Accessories: Starlight Xpress SX USB Filter Wheel 7x36mm, Teleskop-Service TS9-OAG off axis guider
Dates: Dec. 31, 2013
Baader Planetarium Ha 7nm 36mm: 3×1200″ -20C bin 1×1
Baader Planetarium O3 8.5nm 36mm: 19×150″ -20C bin 2×2
Baader Planetarium S2 8nm 36mm: 19×150″ -20C bin 2×2
Integration: 2.6 hours
Darks: ~3

Autor: Alistair Symon

AstroPhotography of the day by SPONLI
8 January 2014

We select the best works of amateur astrophotographers with details of equipment, shooting processing etc.