Hayakawa, Masashi, Japan

• Annals of Geophysics Vol. 66 No. 6 (2023) - Special Issue: Developments in Earthquake Precursors Studies
  Schumann resonance anomalies associated with two (M~7) Tohoku offshore earthquakes in the spring of 2021
  Abstract  PDF
• Annals of Geophysics Vol. 55 No. 1 (2012) - EARTHQUAKE PRECURSORS / Special Issue ed. by P.F. Biagi, M.E. Contadakis, M. Hayakawa and T. Maggipinto
  Possible precursor to the March 11, 2011, Japan earthquake: ionospheric perturbations as seen by subionospheric very low frequency/low frequency propagation
  Abstract  PDF
• Annals of Geophysics Vol. 55 No. 1 (2012) - EARTHQUAKE PRECURSORS / Special Issue ed. by P.F. Biagi, M.E. Contadakis, M. Hayakawa and T. Maggipinto
  Preface
  Abstract  PDF
• Annals of Geophysics Vol. 55 No. 1 (2012) - EARTHQUAKE PRECURSORS / Special Issue ed. by P.F. Biagi, M.E. Contadakis, M. Hayakawa and T. Maggipinto
  Anomaly disturbances of the magnetic fields before the strong earthquake in Japan on March 11, 2011
  Abstract  PDF
• Annals of Geophysics Vol. 55 No. 1 (2012) - EARTHQUAKE PRECURSORS / Special Issue ed. by P.F. Biagi, M.E. Contadakis, M. Hayakawa and T. Maggipinto
  Ionospheric turbulence from ground-based and satellite VLF/LF transmitter signal observations for the Simushir earthquake (November 15, 2006)
  Abstract  PDF
• Annals of Geophysics Vol. 56 No. 3 (2013) - Research Articles
  Neural network approach to the prediction of seismic events based on low-frequency signal monitoring of the Kuril-Kamchatka and Japanese regions
  Abstract  PDF
• Annals of Geophysics Vol. 58 No. 5 (2015) - Physics of the Atmosphere
  Ionospheric perturbations related to the earthquake in Vrancea area on November 22, 2014, as detected by electromagnetic VLF/LF frequency signals
  Abstract  PDF
• Annals of Geophysics Vol. 55 No. 1 (2012) - EARTHQUAKE PRECURSORS / Special Issue ed. by P.F. Biagi, M.E. Contadakis, M. Hayakawa and T. Maggipinto
  Ionospheric perturbations associated with two huge earthquakes in Japan, using principal component analysis for multiple subionospheric VLF/LF propagation paths
  Abstract  PDF
• Annals of Geophysics Vol. 59 No. 3 (2016) - Seismology
  Criticality features in ultra-low frequency magnetic fields prior to the 2013 M6.3 Kobe earthquake
  Abstract  PDF
• Annals of Geophysics Vol. 55 No. 1 (2012) - EARTHQUAKE PRECURSORS / Special Issue ed. by P.F. Biagi, M.E. Contadakis, M. Hayakawa and T. Maggipinto
  Low frequency signal spectrum analysis for strong earthquakes
  Abstract  PDF
• Annals of Geophysics Vol. 66 No. 6 (2023) - Special Issue: Developments in Earthquake Precursors Studies
  Multi-parametric study of seismogenic anomalies during the 2021 Crete earthquake (M=6.0)
  Abstract  PDF
• Annals of Geophysics Vol. 66 No. 6 (2023) - Special Issue: Developments in Earthquake Precursors Studies
  Lower-ionosphere anomalies prior to strong earthquakes that occurred in north-central mainland Greece on March 2021 as revealed by multi-method analysis of VLF sub-ionospheric propagation data
  Abstract  PDF