The Solar Weather/Solar Activity Monitoring and Forecast -- Using CME Observations for Geomagnetic Storm Forecasting -- Solar Activity Monitoring -- Modeling of Solar Energetic Particles in Interplanetary Space -- Simulating CME Initiation and Evolution: State-of-the-art -- Signatures of the Ancient Sun Constraining the Early Emergence of Life on Earth -- The Sun’s Interaction with the Earth’s Thermosphere and Climate System -- Solar Variability and Climate -- Influence of Solar Activity Cycles on Earth’s Climate -- Unravelling Signs of Global Change in the Ionosphere -- Thermosphere Density Model Calibration -- Numerical Space Weather Prediction: Can Meteorologists Forecast the Way Ahead? -- Ionosphere/Positioning and Telecommunications -- Space Weather Influence on Satellite-based Navigation and Precise Positioning -- New improvements in HF Ionospheric Communication and Direction Finding Systems -- Short-Term fo F2 Forecast: Present Day State of Art -- Manifestation of Strong Geomagnetic Storms in the Ionosphere above Europe -- Effects of Scintillations in GNSS Operation -- Radiation Environment of the Earth–Spacecraft and Aircraft Environment -- Complementarity of Measurements and Models in Reproducing Earth’s Radiation Belt Dynamics -- Radiation Effects on Spacecraft and Countermeasures, Selected Cases -- Aircraft Crew Radiation Exposure in Aviation Altitudes During Quiet and Solar Storm Periods -- The Magnetic Environment – GIC and other Ground Effects -- Geomagnetic Indices in Solar-Terrestrial Physics and Space Weather -- The Value of Real-time Geomagnetic Reference Data to the Oil and Gas Industry -- Spatiotemporal Characteristics of the Ground Electromagnetic Field Fluctuations in the Auroral Region and Implications on the Predictability of Geomagnetically Induced Currents -- Finnish Experiences with Grid Effects of GIC’s.