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19 May 2014 - 25 May 2014 Published by the STCE - this issue : 28 May 2014. Availableonline at http://www.stce.be/newsletter/ . The Solar-Terrestrial Centre of Excellence (STCE) is acollaborative network of the Belgian Institute for SpaceAeronomy, the Royal Observatory of Belgium and the RoyalMeteorological Institute of Belgium.
1. 2014 STCE update - June 12 2. PROBA2 Observations (19 May 2014 - 25 May 2014) 3. Review of solar and geomagnetic activity 4. Noticeable Solar Events (19 May 2014 - 25 May 2014) 5. Geomagnetic Observations at Dourbes (19 May 2014 - 25 May 2014) 6. Review of ionospheric activity (19 May 2014 - 25 May 2014) 8. New documents in the European Space Weather Portal Repository R. Van der Linden, General Coordinator STCE,Ringlaan - 3 - Avenue Circulaire, 1180 Brussels,Belgium 19 May 2014 - 25 May 2014
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1. 2014 STCE update - June 12
We invite you for an 2014 STCE update presented on June 12. We compiled a morning filling programwith enthusiastic speakers and activities.
Ronald Van der Linden opens the meeting at 10h after an optional caffeine shot,Going smoothly to our guest speaker from the British Geological Survey (BGS): Alan Thompson.
Followed by an outline of 5 workshops by Nicolas Bergeot, Cis Verbeeck, Els Janssen, Michael Pietersand Pepijn Cardoen: * Modelling of antennas and calibration of radio instruments, June 6, 2014 - still to come!!* Physical Processes in Solar-Terrestrial Plasmas, 20, 22 and 23 May, 2014* Long term solar changes, May 19, 2014* Tomography and 3D reconstruction, April 7, 2014* Science and science operations of the PROBA satellite fleet, March 31, 2014 After a break with caffeine and/or vitamins, you will meet Julie Berckmans, Antonio Martinez, Dan Ryanand again Pepijn during a guided tour through the mysteries of LYRA, Radio science fiction, GNSSinvestigations of the troposphere and the Picasso space technology.
We conclude with lunch.
The annual meeting will take place in the buildings - Meridian Room - of the Space Pole, Ringlaan 3,1180 Brussels, Belgium.
program: http://www.stce.be/annualmeeting/annualmeeting2014.phpRegistration is free, easy and 1 click away: http://tinyurl.com/pjyc9dj - deadline Tuesday June 10, noneed to wait that long.
We hope to welcome you at our yearly STCE event! 2. PROBA2 Observations (19 May 2014 - 25 May 2014)
Solar flare activity was low this week, except on Saturday when an M1.3 flare occurred.
In order to view the activity of this week in more detail, we suggest going to the following website fromwhich 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: http://proba2.oma.be/swap/data/mpg/movies/WeeklyReportMovies/WR217_May19_May25/weekly_movie_2014_05_19.mp4 (SWAP week 217).
Details about some of this week's events can be found further below.
19 May 2014 - 25 May 2014
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Wednesday May 21
Eruption on-disk, Center, between North and South @ 19:37 - SWAP difference image 19 May 2014 - 25 May 2014
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Saturday May 24
M1.3 flare in South West Quadrant @ 18:37 - SWAP difference image 3. Review of solar and geomagnetic activity
Solar activity was mostly at C level during the week of May 19 to 25, 2014. In total, one M flare and23 C flares were observed. There was some sporadic C flaring from NOAA regions 2066, 2071, 2072,2073, and 2068 in the first half of the week. In the second half of the week, AR 2068 released almostall C flares and the M1.3 flare of May 24.
19 May 2014 - 25 May 2014
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Solar wind speed as observed by ACE was low (between 300 and 350 km/s) until the arrival of a highspeed stream from a southerly coronal hole.
The co-rotating interaction region arrived on May 22. The solar wind speed increased up to about 500km/s on May 23, causing a minor geomagnetic storm in the late UT hours of that day. Geomagnetic 19 May 2014 - 25 May 2014
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activity has been quiet (K Dourbes and NOAA Kp less than 4) throughout the rest of the week. The solarwind speed had decreased to about 400 km/s at the end of May 25.
4. Noticeable Solar Events (19 May 2014 - 25 May 2014)
LOC: approximate heliographic location TYPE: radio burst type XRAY: X-ray flare class Cat: Catania sunspot group number OP: optical flare class NOAA: NOAA active region number 10CM: peak 10 cm radio flux 19 May 2014 - 25 May 2014
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5. Geomagnetic Observations at Dourbes (19 May 2014 - 25 May
2014)
6. Review of ionospheric activity (19 May 2014 - 25 May 2014)
The figure shows the time evolution of the Vertical Total Electron Content (VTEC) (in red) during thelast 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) 19 May 2014 - 25 May 2014
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This figure also shows (in grey) the normal ionospheric behaviour expected based on the median VTECfrom the 15 previous days.
The VTEC is expressed in TECu (with TECu=10 16 electrons per square meter) and is directly relatedto 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 60kmto 1000km above the Earth's surface.The ionization process in the ionosphere produces ions and freeelectrons. 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, seehttp://gnss.be/ionosphere_tutorial.php 7. Future Events
For more details, see http://www.spaceweather.eu/en/event/future
STCE workshop on degradation and inter-calibration of instruments observing
in the SXR-EUV range in Brussels, Belgium
Start : 2014-06-10 - End : 2014-06-11The STCE workshop 'Inter-Calibration and Degradation of EUV Instruments' aims at understanding thedifferences observed between the various instruments observing in the SXR-EUV range and at analyzingthe ageing effects that affect their results. It targets imagers as well as spectrometers and photometers.
The workshop will be followed by two days of working sessions (June 12-13) organized by the Solar EUVIrradiance Working Group (also supported by the STCE). These working sessions are in the continuityof similar events organized in 2011, 2012 and 2013, but they are open to new participants and you arewelcome to join if you are interested.
Website:http://www.stce.be/euvworkshop2014/ 3rd SWARM science meeting in Copenhagen, Denmark
Start : 2014-06-19 - End : 2014-06-20During the summer of 2014 DTU Space will host the 3rd Swarm Science Meeting, sponsored bythe European Space Agency, ESA . This meeting will take place at the IDA Conference Centre inCopenhagen on June 19th to 20th 2014 and is open to the science community at large.
Website:http://congrexprojects.com/2014-events/Swarm/home 8. New documents in the European Space Weather Portal
Repository
STCE - Tomography workshop: 3D propagation of CMEs
Presentation given at the STCE Workshop Tomography and 3D reconstruction in space science, April2014 on 3D CME reconstruction: constraints, methods and an application.
http://www.spaceweather.eu/en/repository/show?id=516 19 May 2014 - 25 May 2014
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STCE - Tomography workshop: SDO/AIA 3D temperature/density
reconstructions of the solar corona
Presentation given at the workshop Tomography and 3D reconstruction in space science, April 2014 ontemperature and density reconstruction of coronal structures. The technique which is based on Pythonis applied to polar plumes observed in SDO/AIA images.
http://www.spaceweather.eu/en/repository/show?id=517 STCE - Tomography workshop: Tomography at all scales
Presentation given at the workshop Tomography and 3D reconstruction in space science, April 2014about the work performed at Vision Lab ASTRA: All Scale Tomographic Reconstruction Antwerp.
http://www.spaceweather.eu/en/repository/show?id=518 STCE - Tomography workshop: estimates of energy of electron precipitation
above auroral arcs
Presentation given at the workshop Tomography and 3D reconstruction in space science, April 2014 onhow the 2D energy spectra of electron above the auroral arcs are estimated. The technique uses opticalground-based observations done with ALIS, Auroral Large imaging System.
http://www.spaceweather.eu/en/repository/show?id=519 eHEROES - where Space Weather and Communication meet
Raising awareness and get people outside the scientific community involved in space weather becomesmore and more an issue. To cross the borders of our science project eHEROES, we came up with a tidecommunication plan that answers the questions: what, to whom, why, when, how, by whom? The key is tolink the audience and your message in a correct way. Both formal and informal education are on our toollist. This is an invited poster presented at EGU, 2014 in the session Raising and maintaining awareness ofour local space weather: education and public outreach. eHEROES, Environment for Human Explorationand RObotic Experimentation in Space is an FP7 project (n° 284461, www.eheroes.eu).
http://www.spaceweather.eu/en/repository/show?id=520 STCE - Solar changes workshop : Long term TSI variation
Presentation given at the STCE workshop Long Term Solar changes about the variation of the TSImeasured from space by past and present missions, e.g. Diarad/Sovim. These data are used toreconstruct the TSI up to 400 years ago.
http://www.spaceweather.eu/en/repository/show?id=521 STCE - Solar changes workshop : Sova-Picard TSI results/revision of the value
of the Solar Constant
Presentation given at the STCE workshop Long Term Solar Changes about the revision of the efficiencycorrection factor used for Sova-P TSI data series.
http://www.spaceweather.eu/en/repository/show?id=522 STCE - Solar changes workshop : Solspec Spectral Solar Irradiance
measumements
Presentation given at the STCE workshop Long Term Solar changes about Solar Solspec on board ofthe ISS.
http://www.spaceweather.eu/en/repository/show?id=523 STCE - Solar changes workshop : Long-Term solar changes influence on
geomagnetic field, cosmic rays and ionospheric parameters
Presentation given at the STCE workshop Long Term Solar changes on the influence of long term solarchanges on parameters describing the earth magnetosphere, cosmic rays and the ionosphere.
http://www.spaceweather.eu/en/repository/show?id=524 19 May 2014 - 25 May 2014
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STCE - Solar Changes Workshop : Solar- and Terrestrial- radiation recorded by
BOS aboard PICARD
Presentation given at the STCE workshop Long Term Solar changes about the radiation recorded bythe Bolometric Oscillation sensor aboard the PICARD micro satellite.
http://www.spaceweather.eu/en/repository/show?id=525 19 May 2014 - 25 May 2014
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Source: http://www.stce.be/newsletter/pdf/2014/STCEnews20140528.pdf