2020 GRS-Bay Rift (Chimney) activity and GRS 3-month oscillation 
| 2020 GRS-Bay Rift (Chimney) activity and GRS 3-month oscillation by S.Mizumoto & K.Horikawa |
2020 GRS-Bay Rift (Chimney)活動とGRSの3 ヶ月振動（水元伸二、堀川 邦昭） 2020 GRS-Bay Rift (Chimney) activity and GRS 3-month oscillation（by S. Mizumoto, K. Horikawa）
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