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Physical Models for Solar Cycle Predictions
The dynamic activity of stars such as the Sun influences (exo)planetary space environments through modulation of stellar radiation, plasma wind,...
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Solar Cycle Observations
We describe the defining observations of the solar cycle that provide constraints for the dynamo processes operating within the Sun. Specifically, we...
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The Coronal Flattening Index at the 20 April 2023 Total Solar Eclipse and the Prediction of Solar Cycle 25
The Ludendorff coronal flattening index is a quantitative parameter to analyze the global structure and shape of the corona. This index plays a...
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Solar Energetic-Particle Ground-Level Enhancements and the Solar Cycle
Severe geomagnetic storms appear to be ordered by the solar cycle in a number of ways. They occur more frequently close to solar maximum and the...
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The Sun’s Non-Potential Corona over Solar Cycle 24
The global magnetic field in the solar corona is known to contain free magnetic energy and magnetic helicity above that of a current-free (potential)...
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Models for the long-term variations of solar activity
One obvious feature of the solar cycle is its variation from one cycle to another. In this article, we review the dynamo models for the long-term...
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Predicting the Maximum of Solar Cycle 25: Total Power at the Cycle’s Beginning and in the Previous Cycle as Precursor
Abstract —Solar activity, the most famous manifestation of which is sunspots, varies with a period of approximately 11 years. Two 11-year cycles form...
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Prediction of the Maximum Amplitude of Solar Cycle 25 Using the Ascending Inflection Point
In this work, we predict the maximum amplitude (using the 13-month smoothed Solar Influences Data Analysis Center (SILSO) Sunspot Number, version 2)...
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Solar Cycle Structure and Structure of Activity Cycles at Late-Type Stars
AbstractIt is shown that a description of the solar cycle using the odd zonal harmonic of the solar magnetic field expands our capabilities in two...
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Forecasting Solar Cycle 25 with Physical Model-Validated Recurrent Neural Networks
The Sun’s activity, which is associated with the solar magnetic cycle, creates a dynamic environment in space known as space weather. Severe space...
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A Catalog of Metric Type II Radio Bursts Detected by RSTN During Solar Cycle 24
In this study, we compile a catalog of metric type II radio bursts using the Radio Solar Telescope Network (RSTN) to study the occurrence,...
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Causal Analysis of Influence of the Solar Cycle and Latitudinal Solar-Wind Structure on Co-Rotation Forecasts
Studying solar-wind conditions is central to forecasting the impact of space weather on Earth. Under the assumption that the structure of this wind...
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A Critical Comment on “Can Solar Cycle 25 Be a New Dalton Minimum?”
The sunspot number is the most used solar-activity index to study the behavior of solar activity. In this work, we reproduce the methodology of...
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Parker Solar Probe: Four Years of Discoveries at Solar Cycle Minimum
Launched on 12 Aug. 2018, NASA’s Parker Solar Probe had completed 13 of its scheduled 24 orbits around the Sun by Nov. 2022. The mission’s primary...
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On the Strength and Duration of Solar Cycle 25: A Novel Quantile-Based Superposed-Epoch Analysis
The sunspot number (SSN) is an important – albeit nuanced – parameter that can be used as an indirect measure of solar activity. Predictions of...
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An Improved Prediction of Solar Cycle 25 Using Deep Learning Based Neural Network
A deep-learning Vanilla, or single layer, Long Short-Term Memory model is proposed for improving the prediction of Solar Cycle 25. WDC-SILSO the...
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Dependence of North–South Difference in the Slope of Joy’s Law on the Amplitude of Solar Cycle
Study of the tilt angles of solar bipolar magnetic regions is important because the tilt angles have an important role in the solar dynamo. We...
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Deciphering Solar Magnetic Activity: 140 Years of the ‘Extended Solar Cycle’ – Map** the Hale Cycle
We investigate the occurrence of the “extended solar cycle” (ESC) as it occurs in a host of observational data spanning 140 years. Investigating...
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Sunspot-Cycle Evolution of Major Periodicities of Solar Activity
Solar activity is generally periodic in nature, having a main periodicity of ≈ 11 years, known as the solar cycle. Sunspots are one of the visible...
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Observationally Guided Models for the Solar Dynamo and the Role of the Surface Field
Theoretical models for the solar dynamo range from simple low-dimensional “toy models” to complex 3D-MHD simulations. Here we mainly discuss...
