Helioseismic inferences of the solar cycles 23 and 24: GOLF and VIRGO   observations
  The Sun-as-a-star helioseismic spectrophotometer GOLF and photometer VIRGO instruments onboard the SoHO spacecraft are collecting high-quality, continuous data since April 1996. We analyze here these unique datasets in order to investigate the peculiar and weak on-going solar cycle 24. As this cycle 24 is reaching its maximum, we compare its rising phase with the rising phase of the previous solar cycle 23. 
D. Salabert, R.A. Garcia, A. Jimenez
astro-ph.SR