Hayakawa Institute of Seismo Electromagnetics Co. Ltd., UEC Alliance Center, Chofu, Tokyo, Japan - Articles

On the Tempo-Spatial Evolution of the Lower Ionospheric Perturbation for the 2016 Kumamoto Earthquakes from Comparisons of VLF Propagation Data Observed at Multiple Stations with Wave-Hop Theoretical Computations (Articles)

Tomokazu Asano, Masashi Hayakawa

Open Journal of Earthquake Research Vol.7 No.3，July 23, 2018

DOI: 10.4236/ojer.2018.73010 1,130 Downloads 2,067 Views Citations
Variations of Geomagnetic Response Functions before the 2011 Tohoku Earthquake (Articles)

Igor I. Rokityansky, Valeriia I. Babak, Artem V. Terehyns, Masashi Hayakawa

Open Journal of Earthquake Research Vol.8 No.2，May 20, 2019

DOI: 10.4236/ojer.2019.82005 780 Downloads 1,774 Views Citations
Characteristic Variations of VLF/LF Signals during a High Seismic Activity in Japan in November 2016 (Articles)

Tomokazu Asano, Alexander Rozhnoi, Maria Solovieva, Masashi Hayakawa

Open Journal of Earthquake Research Vol.6 No.4，November 3, 2017

DOI: 10.4236/ojer.2017.64013 1,106 Downloads 2,137 Views Citations
Variations of Atmospheric ELF/VLF Radio Noise Due to Seismogenic Modifications in Tropospheric Conductivity (Articles)

Masashi Hayakawa, Alexander P. Nickolaenko

Open Journal of Earthquake Research Vol.13 No.2，May 27, 2024

DOI: 10.4236/ojer.2024.132005 157 Downloads 507 Views Citations
A Study on the Correlation of Milk Yield of Cows with Seismicity and ULF Magnetic Field Variations (Articles)

Masashi Hayakawa, Tomokazu Asano, Alexander Schekotov, Hiroyuki Yamauchi

Open Journal of Earthquake Research Vol.5 No.4，November 17, 2016

DOI: 10.4236/ojer.2016.54017 1,461 Downloads 2,749 Views Citations
Electromagnetic Precursors to the 2016 Kumamoto Earthquakes (Articles)

Alexander Schekotov, Jun Izutsu, Tomokazu Asano, Stelios Marcos Potirakis, Masashi Hayakawa

Open Journal of Earthquake Research Vol.6 No.4，September 30, 2017

DOI: 10.4236/ojer.2017.64010 1,276 Downloads 2,702 Views Citations
On the Relative Effect of Magnitude and Depth of Earthquakes in the Generation of Seismo-Ionospheric Perturbations at Middle Latitudes as Based on the Analysis of Subionospheric Propagation Data of JJY (40 kHz)-Kamchatka Path (Articles)

Masashi Hayakaw, Alexander Rozhnoi, Maria Solovieva

Open Journal of Earthquake Research Vol.2 No.2，May 15, 2013

DOI: 10.4236/ojer.2013.22003 3,564 Downloads 8,977 Views Citations
On the Precursory Abnormal Animal Behavior and Electromagnetic Effects for the Kobe Earthquake (M~6) on April 12, 2013 (Articles)

Masashi Hayakawa, Hiroyuki Yamauchi, Nobuyo Ohtani, Mitsuaki Ohta, Susumu Tosa, Tomokazu Asano, Alexander Schekotov, Jun Izutsu, Stelios M. Potirakis, Konstantinos Eftaxias

Open Journal of Earthquake Research Vol.5 No.3，August 5, 2016

DOI: 10.4236/ojer.2016.53013 2,496 Downloads 4,356 Views Citations
On the Anomalies in ULF Magnetic Field Variations Prior to the 2008 Sichuan Earthquake (Articles)

Qi Li, Alexander Schekotov, Tomokazu Asano, Masashi Hayakawa

Open Journal of Earthquake Research Vol.4 No.2，April 14, 2015

DOI: 10.4236/ojer.2015.42005 4,421 Downloads 5,645 Views Citations
A Study on Lithosphere-Atmosphere-Ionosphere Coupling Channel for the 1995 Kobe Earthquake, by Including Ground-Based Meteorological Anomalies (Articles)

Hide’aki Hinata, Koichiro Michimoto, Yuko Ozawa, Masashi Hayakawa

Open Journal of Earthquake Research Vol.14 No.2，May 21, 2025

DOI: 10.4236/ojer.2025.142007 53 Downloads 154 Views Citations
Meteorological Anomalies Based on Ground-Based AMeDAS Data for the 1995 Kobe Earthquake: Critical Natural Time Analysis (Articles)

Masashi Hayakawa, Stelios M. Potirakis, Shinji Hirooka, Yasuhide Hobara

Open Journal of Earthquake Research Vol.14 No.2，April 30, 2025

DOI: 10.4236/ojer.2025.142006 70 Downloads 214 Views Citations
Formation of Ionospheric Precursors of Earthquakes—Probable Mechanism and Its Substantiation (Articles)

Georgii Lizunov, Tatiana Skorokhod, Masashi Hayakawa, Valery Korepanov

Open Journal of Earthquake Research Vol.9 No.2，March 16, 2020

DOI: 10.4236/ojer.2020.92009 729 Downloads 2,123 Views Citations
This article belongs to the Special Issue on Seismo Electromagnetics and Earthquake Prediction
An Integrated Study of ULF Magnetic Field Variations in Association with the 2008 Sichuan Earthquake, on the Basis of Statistical and Critical Analyses (Articles)

Masashi Hayakawa, Alexander Schekotov, Stelios M. Potirakis, Konstantinos Eftaxias, Qi Li, Tomokazu Asano

Open Journal of Earthquake Research Vol.4 No.3，July 24, 2015

DOI: 10.4236/ojer.2015.43008 3,814 Downloads 5,245 Views Citations
Tackling the Stiglitz Report: Measuring Social Progress and Economic Performance under Various Climate Policy Scenarios (Articles)

Koji Tokimatsu, Rieko Yasuoka, Masahiro Nishio

Modern Economy Vol.10 No.11，November 20, 2019

DOI: 10.4236/me.2019.1011139 610 Downloads 1,494 Views Citations
Assumption of Fixed Ball at the Centre of Mass of the Hand Results in Underestimation of Wrist Muscle Flexion Torque Component Owing to Ball Kinetics Immediately before Ball Release in Baseball Throwing (Articles)

Takeji Kojima

Advances in Physical Education Vol.15 No.2，May 31, 2025

DOI: 10.4236/ape.2025.152020 19 Downloads 75 Views Citations
Improvement of Characteristics of Gas Pressure Control System Using Porous Materials (Articles)

Jiehong Peng, Chongho Youn, Tomoaki Takeuchi, Toshiharu Kagawa

Journal of Flow Control, Measurement & Visualization Vol.3 No.4，October 23, 2015

DOI: 10.4236/jfcmv.2015.34016 3,524 Downloads 4,799 Views Citations
Knowledge Sharing and Creating Process in a Social Development Project: Developing a Model for Intra-Project Knowledge Management (Articles)

Masahiro Oseko

Open Journal of Social Sciences Vol.5 No.10，October 13, 2017

DOI: 10.4236/jss.2017.510011 1,142 Downloads 2,621 Views Citations
Lexicon Creation for Financial Sentiment Analysis Using Network Embedding (Articles)

Ryo Ito, Kiyoshi Izumi, Hiroki Sakaji, Shintaro Suda

Journal of Mathematical Finance Vol.7 No.4，November 17, 2017

DOI: 10.4236/jmf.2017.74048 2,441 Downloads 5,111 Views Citations
Shallow Reflection Surveys of the East Ongul Island, the Lützow-Holm Complex, East Antarctica (Articles)

Masaki Kanao, Tetsuya Takemoto, Akira Fujiwara, Kiyoshi Ito, Takeshi Ikawa

International Journal of Geosciences Vol.5 No.9，August 28, 2014

DOI: 10.4236/ijg.2014.59089 4,354 Downloads 5,287 Views Citations
Optimal Investment Strategy for Kinked Utility Maximization: Covered Call Option Strategy (Articles)

Miwaka Yamashita

Journal of Mathematical Finance Vol.4 No.2，February 14, 2014

DOI: 10.4236/jmf.2014.42006 4,607 Downloads 7,579 Views Citations

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