STCE Newsletter

1. Direct your own solar movie
2. PROBA2 Observations (6 Feb 2017 - 12 Feb 2017)
3. Review of solar and geomagnetic activity
4. The International Sunspot Number
5. Geomagnetic Observations at Dourbes (6 Feb 2017 - 12 Feb 2017)
6. Review of ionospheric activity (6 Feb 2017 - 12 Feb 2017)
7. Future Events

Direct your own solar movie

From the time we sent satellites into space, we got to know the Sun as a dynamic star that influences us in ways we would never expect. Our star makes 'space weather'. Space weather is a young science that gains importance because it can have a serious impact on everyday technology like navigation systems and time registration.
With the software JHelioviewer, we can browse in a virtual way through the solar atmosphere, along magnetic loops, force fields and solar storms.

With JHelioviewer, we can direct our own Solar Movie. And so we did. We presented 4 great workshops for high schools with a high fun and educative level: http://www.stce.be/movies/JHelioviewerWS/

Download the free JHelioviewer software at http://www.jhelioviewer.org
Or go directly to http://swhv.oma.be/download/

PROBA2 Observations (6 Feb 2017 - 12 Feb 2017)

Solar Activity

Solar flare activity fluctuated between very low and low during the week.
In order to view the activity of this week in more detail, we suggest to go to the following website from which all the daily (normal and difference) movies can be accessed: http://proba2.oma.be/ssa
This page also lists the recorded flaring events.

A weekly overview movie can be found here (SWAP week 359).
http://proba2.oma.be/swap/data/mpg/movies/weekly_movies/weekly_movie_2017_02_06.mp4

Details about some of this week’s events, can be found further below.

If any of the linked movies are unavailable they can be found in the P2SC movie repository here
http://proba2.oma.be/swap/data/mpg/movies/

Tuesday Feb 07

A Southern coronal hole, which produced enhanced geomagnetic conditions at the Earth was seen on the the solar disk at the beginning of the week, this can be seen in the above SWAP image in the Western hemisphere.
Find a movie of the events here (SWAP movie).
http://proba2.oma.be/swap/data/mpg/movies/20170207_swap_movie.mp4

Thursday Feb 09

AR 2635 produced eleven B-flares and three C-class flares on 2017-Feb-09 (the largest one was a C1.3). This active region is visible above in the North-East part of the Sun flaring at 07:02 UT when it produced a C1.1 class flare.
Find a movie of the events here (SWAP movie).
http://proba2.oma.be/swap/data/mpg/movies/20170209_swap_movie.mp4

Review of solar and geomagnetic activity

Solar Activity

Two alpha active regions were visible at the beginning of the week, NOAA AR 2632 and 2634. They did not produce any flares. Solar conditions were quiet throughout the week. NOAA AR 2635 emerged north of NOAA AR 2634 on February 9 (with beta magnetic field configuration) and produced 3 minor C-class flares (C1.3 max 03:26 UT on that day).

Geomagnetic activity

Geomagnetically, the week started under the effect of a high speed stream from the southern polar coronal hole that caused K=4 on February 6 and 7. The rest of the week was quiet.

Click here for a running presentation of the Space Weather briefing of Monday Feb 13 presented at the RWC Brussels: http://www.stce.be/movies/SIDCbriefing-20170213.ppsm

The International Sunspot Number

The daily Estimated International Sunspot Number (EISN, red curve with shaded error) derived by a simplified method from real-time data from the worldwide SILSO network. It extends the official Sunspot Number from the full processing of the preceding month (green line). The plot shows the last 30 days (about one solar rotation). The horizontal blue line shows the current monthly average, while the green dots give the number of stations included in the calculation of the EISN for each day.

Geomagnetic Observations at Dourbes (6 Feb 2017 - 12 Feb 2017)

Review of ionospheric activity (6 Feb 2017 - 12 Feb 2017)

The figure shows the time evolution of the Vertical Total Electron Content (VTEC) (in red) during the last week at three locations:
a) in the northern part of Europe(N61°, 5°E)
b) above Brussels(N50.5°, 4.5°E)
c) in the southern part of Europe(N36°, 5°E)
This figure also shows (in grey) the normal ionospheric behaviour expected based on the median VTEC from the 15 previous days.

The VTEC is expressed in TECu (with TECu=10^16 electrons per square meter) and is directly related to the signal propagation delay due to the ionosphere (in figure: delay on GPS L1 frequency).
The Sun's radiation ionizes the Earth's upper atmosphere, the ionosphere, located from about 60km to 1000km above the Earth's surface.The ionization process in the ionosphere produces ions and free electrons. These electrons perturb the propagation of the GNSS (Global Navigation Satellite System) signals by inducing a so-called ionospheric delay.

See http://stce.be/newsletter/GNSS_final.pdf for some more explanations ; for detailed information, see http://gnss.be/ionosphere_tutorial.php

Future Events

For more details, see http://www.spaceweather.eu/en/event/future

International CCMC-LWS Workshop in Cape Canaveral, Florida (USA)

Start : 2017-04-03 - End : 2017-04-07
The goal of this working meeting is to address the need to quantify and to track progress over time in the field of space weather and to establish internationally recognized metrics that are meaningful to end-users and developers. Defining a set of appropriate metrics is important to track advancements in space weather understanding and predictive capabilities.
This meeting is a part of the unfolding activities of the International Forum for Space Weather Capabilities Assessment that brings together space environment experts, model and application developers, data providers, forecasters and end-users. The goals of this community-wide forum include addressing challenges in model-data comparisons and evaluating the current state of space environment predictive capabilities. Workshop attendance is encouraged but is not a requirement for joining forum teams.
Website:
http://ccmc.gsfc.nasa.gov/CCMC-LWS_Meeting/

Solar Orbiter Workshop 7: Exploring the solar environs in Granada, Spain

Start : 2017-04-03 - End : 2017-04-06
This event will be hosted by the Instituto de Astrofisica de Andalucia - CSIC. Please mind that on April 7th the 20th SWT meeting will take place at the same venue.
Website: Unkown

URSI General Assembly in Montreal, Canada

Start : 2017-08-19 - End : 2017-08-26
For the thirty-second time since the inception of URSI, Radio Scientists from across the world will get together for the URSI General Assembly and Scientific Symposium. This triennial gathering will take place from 19th to 26th of August 2017, in Montreal, Canada. This conference is a unique opportunity to learn about recent advances in all fields of Radio Science, as covered by all ten URSI Commissions.
Among the different sessions, please note:
* 'Radio Science for Space Weather' Conveners: M. Messerotti, V. Pierrard
* 'Remote Sensing and Modeling of the Earth's Plasmasphere and Plasmapause' Conveners: A. M. Jorgensen, V. Pierrard, B. Heilig
The abstract deadline is 30 January 2017
Website: http://www.ursi2017.org

2017 Joint IAPSO-IAMAS-IAGA Assembly in Cape Town, South Africa

Start : 2017-08-27 - End : 2017-09-01
The Local Organising Committee is thrilled to welcome you to the 2017 Joint IAPSO-IAMAS-IAGA Assembly in Cape Town, South Africa. The Joint Assembly, endorsed by the University of Cape Town and the South African Department of Science and Technology, will take place from 27 August to 1 September 2017 at the Cape Town International Convention Centre (CTICC).
Website:
http://iapso-iamas-iaga2017.com/index.php

Workshops on Radiation Monitoring for the International Space Station in Torino, Italy

Start : 2017-09-05 - End : 2017-09-07
The Workshop on Radiation Monitoring for the International Space Station is an annual meeting to discuss the scientific definition of an adequate radiation monitoring package and its use by the scientific community on the ISS. Types of instruments and research topics need to be defined in order to optimise the radiation safety of the ISS crew.
Website: http://wrmiss.org/

European Space Weather Week 14

Start : 2017-11-27 - End : 2017-12-01
The ESWW is the main annual event in the European Space Weather calendar. It is the European forum for Space Weather as proven by the high attendance to the past editions. The agenda will be composed of plenary/parallel sessions, working meetings and dedicated events for service end-users. The ESWW will again adopt the central aim of bringing together the diverse groups in Europe working on different aspects of Space Weather.
Website:
http://www.stce.be/esww14/