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            - 1749
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              | 古墳時代 |  |  
              | 飛鳥時代 |  
                
                 推古 (599, M?)筑紫 (679, M7?)白鳳 (684, M8-9)大宝 (701, M?) |  
              | 奈良時代 |  
                
                 畿内七道 (734, M?)天平 (745, M7.9?) |  
              | 平安時代 |  
                
                 弘仁 (818, M?)天長 (830, M7-7.5)伊豆 (841, M7)出羽 (850, M7.5?)播磨 (868, M7?)貞観 (869, M8.3<)元慶 (878, M7.5<)仁和 (887, M8<)山城・近江 (976, M?)万寿 (1026, M?)永長 (1096, M8<)康和 (1099, M?) |  
              | 鎌倉時代 |  |  
              | 室町時代 |  
                
                 正平 (1361, M8<)応永 (1408, M?)相模 (1433, M?)享徳 (1454, M大?)明応日向 (1498, M?)明応関東? (1495, M?)明応 (1498, M8.2<)越後南西部(1502, M7)永正 (1520, M?) |  
              | 安土桃山時代 |  |  
              | 江戸時代前期 |  
                
                 慶長 (1605, M7.9?)会津 (1611, M6.9)慶長三陸 (1611, M8.1<)高田領? (1614, M7.7?)寛永小田原 (1633, M7?)房総沖 (1655, M?)寛文 (1662, M7.6)日向灘 (1662, M7.6)寛文高田(1666, M6.8)西蒲原 (1670, M6?)延宝八戸沖 (1677, M7.9)延宝房総沖 (1677, M8-8.5)日光 (1683, M7)遠江・三河 (1686, M7.0)能代 (1694, M7.0)元禄 (1703, M8.2-8.5)津軽 (1704, M7.0)宝永 (1707, M8.6-9.3)富士宮 (1707, M7.0)因伯美 (1710, M6.5)小谷 (1714, M6.3)遠山 (1718, M7.0)寛保 (1741, M6.9) |   
            |  | 
    
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            1750 - 1799
            |  
          |  
            
            
             
              | 1750 - 1759 |  |  
              | 1760 - 1769 |  
                
                 佐渡沖 (1762, M7.0)宝暦八戸沖 (1763, M7.9)津軽 (1766, M6.9)日向・豊後・肥後 (1769, M7.8) |  
              | 1770 - 1779 |  |  
              | 1780 - 1789 |  
                
                 庄内 (1780, M7.0)天明小田原 (1782, M7.0)阿波 (1789, M7.1) |  
              | 1790 - 1799 |  
                
                 島原半島 (1792, M6.4)後志 (1792, M7.1)西津軽 (1793, M7.0)寛政 (1793, M8.2)金沢 (1799, M6.0) |   
            |  | 
    
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            1800 - 1849
            |  
          |  
            
            
             
              | 1800 - 1809 |  
                
                 佐渡小木 (1802, M6.6)象潟 (1804, M7.0)紀伊半島沖 (1808, M7.6) |  
              | 1810 - 1819 |  
                
                 羽後 (1810, M6.5)神奈川 (1812, M7.0)文政近江 (1819, M7.3) |  
              | 1820 - 1829 |  |  
              | 1830 - 1839 |  
                
                 京都 (1830, M6.5)美濃西部 (1833, M6.3)庄内沖 (1833, M7.5)石狩 (1834, M6.4)宮城県沖 (1835, M7.0)釧路・厚岸 (1839, M7.0) |  
              | 1840 - 1849 |  
                
                 天保十勝沖 (1843, M8.0)善光寺 (1847, M7.4)頸城 (1847, M6.5) |   
            |  | 
    
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          | 
             
            
            1850 - 1884
            |  
          |  
            
            
             
              | 1850 - 1859 |  
                
                 嘉永小田原 (1853, M6.7)伊賀上野 (1854, M7.4)安政東海 (1854, M8.4)安政南海 (1854, M8.4)豊予海峡 (1854, M7.4)飛騨 (1855, M6.8)宮城県沖 (1855, M7.3)安政 (1855, M7)安政八戸沖 (1856, M7.5-8)芸予 (1857, M7.3)飛越 (1858, M7.1)青森県東方沖 (1858, M7.3) |  
              | 1860 - 1869 |  |  
              | 1870 - 1879 |  |  
              | 1880 - 1884 |  |   
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