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Solar activity forecast based on the mean-field dynamo model and the artificial neural network

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SolarActivityPrediction

Description

This repository contains data of solar activity forecast. Data are obtained using a method based on a combination of the numerical solution of the nonlinear mean-field dynamo equations and the artificial neural network. The detail can be found in the paper (https://doi.org/10.1017/S0022377818000600, PDF-file in the doc/ folder).

Data format

We update our forecast of 13-months running averaged sunspot numbers at the beginning of each month. The files predict_YY_MM.csvappear in the data/ folder.

Format: Comma Separated values

Contents:

  • Column 1-2: Gregorian calendar Year-Month
  • Column 3: predicted sunspot numbers

Specific time intervals

Date period Reference
1997/01—2017/10 tuning methodology
2017/11—2021/09 monthly forecast for testing
2021/10— monthly forecast during the project

Prediction Accuracy Analysis (plots)

We compare our forecast with observational data provided by https://www.sidc.be/silso/datafiles (SN_ms_tot_V2.0.csv is available in the doc/ folder).

  • Actual forecast

plot

  • Latest monthly evaluated predictions and observations R

plot

  • Comparison with the other methods of forecast

plot

  • Forecast data in table form. Each column is for the date of predicted 13-months running average sunspot number (-6 months from the date of the given forecast). Each raw is for the date when the solar activity was predicted

plot

  • All forecasts curves

plot

  • Residual between the predicted and the observed sunspots number for different forecast depths (m - months ahead) plot

  • Standart deviation of the residual between the predicted and the observed sunspots number for different forecast depths (m - months ahead) plot

The project is supported by the Russian Science Foundation (grant No.21-72-20067).

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