Preliminary insight into the relationship between bioaerosols and urban environment obtained from the COVID-19 self-quarantine period in the Tokyo metropolitan area by Kotaro Murata, Hiroshi Okochi, Masashi Kamogawa

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Temporal and Spatial Evolution of Precipitation under the Summer Sprite Parent Mesoscale Convective Systems in Japan by Tomoyuki Suzuki, Masashi Kamogawa, Hironobu Fujiwara, Syugo Hayashi

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MCS Stratiform and Convective Regions Associated with Sprites Observed from Mt. Fuji by Tomoyuki Suzuki, Masashi Kamogawa, Hironobu Fujiwara, Syugo Hayashi

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Catalog of 525 sprites observed over Japan from September 2016 to March 2021 by Maomao Duan, Takanori Sakamoto, Teruaki Enoto, Yuuki Wada, Masashi Kamogawa, Koji Ito

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Nucleation and Cascade Features of Earthquake Mainshock Statistically Explored from Foreshock Seismicity by Masashi Kamogawa, Kazuyoshi Z. Nanjo, Jun Izutsu, Yoshiaki Orihara, Toshiyasu Nagao, Seiya Uyeda

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Improving the Estimation of the Occurrence Time of an Impending Major Earthquake Using the Entropy Change of Seismicity in Natural Time Analysis by Panayiotis A. Varotsos, Nicholas V. Sarlis, Efthimios S. Skordas, Toshiyasu Nagao, Masashi Kamogawa, E. Leticia Flores-Márquez, Alejandro Ramírez-Rojas, Jennifer Perez-Oregon

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Characteristics of the Blitzortung.org Lightning Location Catalog in Japan by Masashi Kamogawa, Tomoyuki Suzuki, Hironobu Fujiwara, Tomomi Narita, Egon Wanke, Kotaro Murata, Toshiyasu Nagao, Tetsuya Kodama, Jun Izutsu, Atsushi Matsuki, Ning Tang, Yasuhiro Minamoto

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