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[], 'type': 'journal'}, 'license': None, 'license_id': None, 'version': 'publishedVersion', 'is_accepted': True, 'is_published': True}, 'sustainable_development_goals': [], 'grants': [], 'datasets': [], 'versions': [], 'referenced_works_count': 1, 'referenced_works': ['https://openalex.org/W2606288514'], 'related_works': ['https://openalex.org/W605406854', 'https://openalex.org/W4220896987', 'https://openalex.org/W3209143062', 'https://openalex.org/W2885214620', 'https://openalex.org/W2882988980', 'https://openalex.org/W2605911323', 'https://openalex.org/W2418855476', 'https://openalex.org/W2165536581', 'https://openalex.org/W2134979643', 'https://openalex.org/W2080568512'], 'abstract_inverted_index': {'1956年8月13日の伊豆沖地震(M=6.5)の余震が松代において多数観測された。PS時間および記象から余震と思われるもの162個(8月中)をえらび出した。ウツドアンダーソン標準振り地震計で記録されたものは直ちにMが決定できるが,大部分は高倍率の上下動電磁地震計で記録されたので,この地震計の記録振幅よりMを決定する方法を導き出した。すべでの余震のMを決定した上で,Mの分布,時間と共に余震によつて放出されたエネルギーを図示した。ある程度余震域から離れた1地点における観測でも,余震の大体の有様は調べられるという1例である。': [0]}, 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