1. Ground-Water Radon Anomaly Before the Kobe Earthquake in Japan
2. Anomaly in Atmospheric Radon Concentration
3. Yasuoka, Y. , Ishikawa, T. , Omori, Y. , Kawada, Y. , Nagahama, H. , Tokonami, S. and Shinogi, M. Anomalous atmospheric radon variation before an earthquake: a case study of the 1995 Kobe earthquake, Japan. In: Handbook of Radon: Properties, Applications and Health. (New York: NOVA Sci. Pub.), pp. 419–434 (2012). ISBN 978-1-62100-369-4. Available on https://www.novapublishers.com/catalog/product_info.php?products_id=35582. (12 February 2016, data last accessed).
4. Radon Anomalies Prior to Earthquakes (II)-Atmospheric Radon Anomaly Observed before the Hyogoken-Nanbu Earthquake-
5. Hatanaka, H. , Yasuoka, Y. , Muto, J. , Nagahama, H. , Suzuki, T. , Homma, Y. , Sakashita, M. , Kobayashi, Y. and Mukai, T. Atmospheric radon concentration linked to crustal strain prior to and/or after earthquakes. In: Proceeding of the 14th Workshop on Environmental Radioactivity. Tsukuba, November 2013. KEK Proceedings 2013-7, 379–385 (2013) (in Japanese, with English abstract). Available on http://ccdb5fs.kek.jp/tiff/2013/1325/1325007.pdf (12 February 2016, data last accessed).