Counts of occurrence per depth in 三重県南東沖

Counts of occurrence per depth in 三重県南東沖(Southeast offshore of Mie Pref. )   is shown as below graph,

1km curve was increased by M7.9 of 40km in 1944, and is keeping the 1st count of all depths. 40km is following behind 1km curve separated by the M7.9 aftershocks, and closing near by the aftershocks of M7.4 of 40km in 2004. The M7.9 occurred on the quartet junction among 10km-40km. The another remarkable future of this area is  the great deal of deep-focus earthquakes deeper than 300km. Especially, 360km curve was upper than 50km curve between 1931-2003. From the point of view of not only the quantity, but also the magnitude,  390km includes the great ones of M7.0/M6.6. 

• 1km(red)⋯ The count is the 1st. There was a rapid increase of 1km count as 26-76 in 1944-1945 as the aftershocks of M7.9 of 40km in 1944. After that, the silent terms of 1km became longer. The longest silent term of 1km is between 1989-2018 (as count 152-153). The largest one of 1km is M6.2 in 1922 count as 2.
• 40km(green)⋯ The count is the 2nd. M7.9 of 40km occurred on the quartet junction among 10km-40km in 1944. The M7.9 is the greatest one of all depths. After that, the silent terms became longer. The 1st/2nd longest silent term of 40km is between 1968-1976 (as count 28-29)/between 1988-1995 (as count 38-39). After that, the silent terms became shorter again. There was a rapid increase of 40km as the aftershocks of both M7.1 (count as 58) and M7.4 (count as 67), and 40km curve became closer to 1km curve so as to fit with. 
• 30km(yellow green)⋯The count is the 3rd. 30km curve is following behind 40km curve. But, the rapid increases were smaller than 40km's ones. Furthermore, the silent terms of 30km also were longer than ones of 40km on average. Top 3 of the longest silent terms are as following,  the 3rd is between 1919-1931 (count as 0-1)/the 1st is between 1931-1944 (count as 1-2) / the 2nd is between 1991-2003 (count as 26-27). The largest one of 30km is M6.5 in 2016 count as 44.
• 10km(yellow)⋯The count is the 4th. There was the longest silent term of 10km between 1919-1944 (count as 0-1). After the rapid increase of 10km count as 1-13 in 1944, 10km had caught up with 40km curve. After that,  there were the 3rd between 1952-1966 (count as 23-24). was following behind 40km curve. Since 1978, there were the 4th/5th/2nd longest silent terms. of 10km. The 4th was between 1978-1990 (count as 27-28). The 5th was between 1991-2000 (count as 29-30). The 2nd was between 2003-2020 (count as 33-34).  The largest one of 10km is M5.9 in 1966 count as 24.
• 20km(orange)⋯The count is the 5th. After the rapid increase of 20km count as 4-12 in 1944-1945, 20km curve was overlapped with 10km curve. Because of less occurrence /longer silent terms of 20km, 20km count was delayed from 10km's one. The largest one of 20km is M6.4 in 1948 count as 18.
• 50km(light blue)⋯The count is the 6th. 50km curve is following behind 40km curve. The largest one is M6.5 of 50km count as 6 in 1944.
• 360km(gray)⋯The count is the 7th. 360km curve was upper than 50km curve between 1931-2003. 50km could overtake 360km adding the aftershocks of the M7.4 of 40km  The largest one is M6.4 of 360km count as 24 in 2022.
• 390km(gray)⋯The count of 390km is only 6. But, both M7.0 in 1984/M6.6 in 2019 are included. The largest one is the M7.0 of 360km count as 3 in 1984.
• others⋯omitted.

MD-T chart in 三重県南東沖

MD-T chart in 三重県南東沖 (Southeast offshore of Mie Pref. )  

MD chart in 三重県南東沖

MD chart  in 三重県南東沖 (Southeast offshore of Mie Pref. ) 

Dragon chart in 三重県南東沖

Dragon chart in 三重県南東沖 (Southeast offshore of Mie Pref. ) is as below,

Sum of Magnitude per 1day in 三重県南東沖

Sum of Magnitude per 1day in 三重県南東沖 (Southeast offshore of Mie Pref. ) 

note : Horizontal axis isn't linear.

Distribution of Magnitude in 三重県南東沖

Distribution of Magnitude in 三重県南東沖 (Southeast offshore of Mie Pref. ) 

Distribution of Depth in 三重県南東沖

Distribution of Depth in 三重県南東沖 (Southeast offshore of Mie Pref. ) 

Area map of 三重県南東沖

Area map of 三重県南東沖 (Southeast offshore of Mie Pref. )  is defined for epicenter's analysis as below,

Counts of occurrence per depth in 三重県

Counts of occurrence per depth in 三重県 (Mie Pref.)  is shown as below graph,

During the 2nd/1st longest silent term of 1km since 1989, 1km curve was overtaken by 10km curve. The count of 1km-40km had each rapid increase induced by the Tonankai Earthquake of 40km in 1944. Some depth count had the accelerated increase after the long silent terms. As a feature of this area, some of the greatest one of this area exists in deeper than 300km of the deep-focus earthquake. The great one is M6.7 of 420km in 1925. 

• 1km(red)⋯ The count is the 2nd. There was the longest silent term between 1927-1929(count as 18-19) at that time. Then, the slope of 1km curve became steeper. In 1944-1945, there was a rapid count increase between 61-171. They were caused by M7.9 The 1944 Tonankai Earthquake of 40km in Off the coast of the Southeast Sea (outside of this area). After that, the silnet terms became longer. The longest silent term is between 1989-2004 (count as 356-357). Next, there was the 2nd silent term between 2004-2015.  The silent terms are becoming shorter again. The largest one of 1km is M5.9 in 1946(count as 234). 
• 10km(yellow)⋯The count is the 1st. 10km curve was following behind 1km curve. Similar to the 1km curve,  there were continuous rapid count increases both in 1944/ in 1945 between 30-41/42-50. There was the longest silent term between 1991-1995 (count as 152-153). The start was 2 years later of the one of 1km, and was covered with 1km's longest silent term. The slope of 1km curve became steeper after the longest silent term the same as 1km curve. During the long silent terms including the 1st/2nd of 1km, 10km curve overtook 1km curve. After the overtaking count as 358, the silent terms became a little bit longer. The largest one of 10km is M5.5 in 1998.   
• 20km(orange)⋯The count is the 3rd. After the longest silent term between 1919-1924, 20km curve was following behind 10km curve. Similar to the 1km/10km curves,  there was a rapid count increase in 1944  between 16-19. The 2nd longest silent term was between 1960-1964 (count as 49-50). After that, the count of 20km was accelerated. Similar to it, 20km count was accelerated after the long silent term between 1986-1989 (count as 79-80).   The largest one of 20km is M5.6 in 1968. 
• 30km(yellow green)⋯The count is the 5th as same as 50km. 30km curve was following behind 20km as the same as 40km curve. Since 1970, there were the 2nd/the 1st longest silent terms between 1970-1981 (count as 38-39)/1991-2003(count as 46-47). So, 30km curve was delayed from 40km curve, and caught up with by 50km curve.  The largest one of 30km is M5.6 in 1944. 
• 40km(green)⋯The count is the 4th. 40km curve was following behind 20km/10km curves. M6.2 of 40km and the aftershocks were induced by the M7.9 The 1944 Tonankai Earthquake of 40km in 1944. The M6.2 is the largest one of 40km. After that, 40km count increased steadily. M6.0 of 40km also occurred in 1960 (count as 34). Since 1998, the count has been accelerated (count as since 72). 
• 50km(light blue)⋯The count is the 5th as same as 30km. After the longest silent term between 1920-1933, 50km curve was following behind 40km curve. 50km count was also accelerated by the M7.9 in 1944. Then, it has been increasing step by step. The 2nd longest silent term was between 1977-1985 (count as 29-30). The largest one of 50km is M6.5 count as 13.
• others⋯M6.7 of 420km in 1925 is the greatest one of all depths. As the major magnitude in deep-focus earthquakes , there are also M6.2 of 350km in 1926,  and M6.0 of 370km in 1970.  

MD-T chart in 三重県

MD-T chart in 三重県（Mie Pref.)

  

MD chart in 三重県

MD chart  in 三重県（Mie Pref. )

  

Dragon chart in 三重県

Dragon chart in 三重県（Mie Pref.)  is as below,

Sum of Magnitude per 1day in 三重県

Sum of Magnitude per 1day in 三重県（Mie Pref.)

note : Horizontal axis isn't linear.

 

Distribution of Magnitude in 三重県

Distribution of Magnitude in 三重県（Mie Pref.)  is as below,

Distribution of Depth in 三重県

Distribution of Depth in 三重県（Mie Pref.)

  

Area map of 三重県

Area map of 三重県（Mie Pref. )  is defined for epicenter's analysis as below,

Counts of occurrence per depth in 愛知県・三河湾・伊勢湾

Counts of occurrence per depth in 愛知県・三河湾・伊勢湾 (Aichi Pref., Mikawa Gulf & Ise Gulf )  is shown as below graph,

During the longest silent term of 1km since 2006, 1km curve was overtaken by 10km curve. The count of 1km-20km had each rapid increase in 1945 caused by M6.4 of 10km in 1945. 40km curve began to leave from 30km curve around 1974 because of the far long silent terms of 30km. Furthermore, there was the acceleration of 40km by M6.1 of itself. 50km is following behind 40km curve, and may catch up with 30km curve soon.  

• 1km (red)…The count is the 2nd. the count was increasing steadily until 1944 and keeping the 1st. Between 1944-1945, there was a rapid increase of 1km affected by M6.8 of 10km. The 1km rapid count increase was between 163-182 in 1944/between 185-304 in 1945. The longest silent term is extending since 2006. The 2nd/3rd longest silent terms are between 1985-1994(count as 516-518)/between 1996-2004(count as 520-521). The largest one of 1km is M5.9 in 1946(count as 370). 
• 10km(yellow)⋯The count is the 1st. 10km curve was following behind 1km curve. As the increase of 1km had stopped since 2006, 10km curve overtook 1km curve in 2023. There was a rapid increase(count as 33-129) of 10km caused by M6.4 of 10km in 1945 similar to the 1km curve. The M6.4 is the greatest one of all depths.
• 20km(orange)⋯The count is the 4th. 20km curve was following behind 1km curve similar to 10km curve. Less rapid increase than 10km made 20km leave from 10km curve by the M6.4 of 10km. Furthermore, 20km curve was overtaknen by 40km curve in 2006(count as 176). The largest one of 20km is M6.0 in 1997.
• 40km(green)⋯The count is the 3rd. 40km curve was following behind 20km curve, and made leave from 20km curve once by the rapid count increase of 20km in 1945. But, 40km curve was accelerated by the 3rd longest silent term between 1976-1981 (count as 86-87), and also the M6.1 of 40km in 1997(count as 120). 40km curve overtook 20km in 2006. The largest one of 40km is M6.1 in 1971.
• 30km(yellow green)⋯The count is the 5th. 30km/40km curves were chasing and being chased to each other until around 1970.  There were the 2nd/1st longest silent terms between 1973-1980(count as 67-68)/1986-1998(count as 74-75). The M6.1 of 40km was occurred in 1997 around the end period of the 1st longest term of 30km. The count of 30km was accelerated by the M6.1 of 40km. The largest one of 30km is M5.5 in 1939.
• 50km(light blue)⋯The count is the 6th. After the 2nd/1st longest silent terms between 1919-1925/1925-1932 continuously, 50km curve is increasing almost steadily. There was the 3rd longest silent term between 1954-1960. After the 3rd one, 50km was accelerated slightly, and became closer to 30km curve. The largest one of M5.4 in 1989.
• others⋯omitted. There was M6.0 of 370km in 1970.

MD-T chart in 愛知県・三河湾・伊勢湾

MD-T chart in 愛知県・三河湾・伊勢湾（Aichi Pref., Mikawa Gulf & Ise Gulf )  

MD chart in 愛知県・三河湾・伊勢湾

MD chart  in 愛知県・三河湾・伊勢湾（Aichi Pref., Mikawa Gulf & Ise Gulf )  

Dragon chart in 愛知県・三河湾・伊勢湾

Dragon chart in 愛知県・三河湾・伊勢湾（Aichi Pref., Mikawa Gulf & Ise Gulf )  is as below,

Sum of Magnitude per 1day in 愛知県・三河湾・伊勢湾

Sum of Magnitude per 1day in 愛知県・三河湾・伊勢湾（Aichi Pref., Mikawa Gulf & Ise Gulf ) 

note : Horizontal axis isn't linear.

Distribution of Magnitude in 愛知県・三河湾・伊勢湾

Distribution of Magnitude in 愛知県・三河湾・伊勢湾（Aichi Pref., Mikawa Gulf & Ise Gulf )  is as below,

Distribution of Depth in 愛知県・三河湾・伊勢湾

Distribution of Depth in 愛知県・三河湾・伊勢湾（Aichi Pref., Mikawa Gulf & Ise Gulf )  

Area map of 愛知県・三河湾・伊勢湾

Area map of 愛知県・三河湾・伊勢湾（Aichi Pref., Mikawa Gulf & Ise Gulf )  is defined for epicenter's analysis as below,

Counts of occurrence per depth in 静岡県中部・西部地方

Counts of occurrence per depth in 静岡県中部・西部地方 (Central & Western region, Shizuoka Pref.)  is shown as below graph,

Because of the long silent terms since 1971, 1km curve was overtaken by 10km-30km curves. 40km/50km curves are following behind them. Similar counts are observed between the start count 131 of 1km of the longest silent term in 1953 and the count 130 of twin junction between 10km/20km in 2007.  The other similar counts of the largest ones of 40km/50km are 53 of M6.1 in 1965/ 51 of M5.9.  

• 1km (red)…The count is the 4th. Until being overtaken by 20km curve in 2009, the count was increasing steadily and keeping the 1st. Between 1944-1945, there was a rapid increase of 1km affected by M6.8 of 10km in Aichi Pref. (outside of this area). The 1km count increased from 74 to 97 before and after the M6.8. Then, the longest silent term was updated as the term between 1953-1956 (count as 131-132). Then, the silent terms became shorter temporarily, and then became longer again. The record breaking of the silent term length often occurred since 1971. During them, 20km curve overtook 1km curve, and 30km/40km curves followed them in later years. The longest silent term of 1km is between 2007-2024 (count as 186-187). The largest one is M5.8 in 1931. The largest one of 1km is M5.8 in 1931. 
• 10km(yellow)⋯The count is the 2nd.  Before M6.4 of 10km in 1935, there were the 3rd/2nd longest silent terms. So, 10km curve was following behind 1km curve with delay. On the other hand, because of too many long silent terms of 1km there were. After the M6.4 of 10km, the count of 10km increased steadily. But, 20km count was accelerated since the twin junction of 10km/20km with the count of 130 in 2007. 10km curve has been delayed from 20km though overtaking 1km curve. The largest one of 10km is the M6.4 in 1935.
• 20km(orange)⋯The count is the 1st. Until around 1975, 20km/30km curves were chasing each other back and forth, and they were following behind 10km curve. After  that, 10km curve joined their chase. As described above, 20km count was accelerated since the twin junction of 10km/20km in 2007. The largest one of 20km is the M6.5 in 2005 as count 168.
• 30km(yellow green)⋯The count is the 3rd. After the chase with 20km curve, 30km curve was also overtaken by 10km in 2011 (as count 156).  The largest one of 30km is the M6.1 in 1965 as the count 53. 
• 40km(green)⋯The count is the 5th. 40km curve is following behind 30km curve. The largest one of 40km is M5.9 in 1997 as the count 51. There was the rapid increase as the aftershocks as the count 51-58. 
• 50km(light blue)⋯The count is the 6th. 50km curve is following behind 40km curve. The count of 50km was accelerated by the M5.9 of 40km in 1997. The largest one of 50km is M5.6 in 1935.
• others⋯omitted. 

MD-T chart in 静岡県中部・西部

MD-T chart in 静岡県中部・西部地方 (Central & Western region, Shizuoka Pref.)

MD chart in 静岡県中部・西部

MD chart  in 静岡県中部・西部地方 (Central & Western region, Shizuoka Pref.)

Dragon chart in 静岡県中部・西部 (graph corrected)

Dragon chart in 静岡県中部・西部地方 (Central & Western region, Shizuoka Pref.)  is as below,

Sum of Magnitude per 1day in 静岡県中部・西部

Sum of Magnitude per 1day in 静岡県中部・西部地方 (Central & Western region, Shizuoka Pref.) 

note : Horizontal axis isn't linear.

Distribution of Magnitude in 静岡県中部・西部地方

Distribution of Magnitude in 静岡県中部・西部地方(Central & Western region, Shizuoka Pref. )  is as below,

Distribution of Depth in 静岡県中部・西部地方 (graph corrected)

Distribution of Depth in 静岡県中部・西部地方(Central & Western region, Shizuoka Pref.)

Area map of 静岡県中部・西部

Area map of 静岡県中部・西部地方 (Central & Western region, Shizuoka Pref.)  is defined for epicenter's analysis as below,

Counts of occurrence per depth in 静岡県伊豆・東部地方

Counts of occurrence per depth 静岡県伊豆・東部地方(Izu&Eastern region, Shizuoka Pref.)   is shown as below graph,

This area is next to the epicenter of M7.9 Great Kanto Earthquake in 相模湾 (Sagami Bay ) and the origin of this area was an isolated volcanic island very long ago. There is a triple junction of 3 plates including Philippine Sea Plate (belonging with Izu area) ,  a volcanic zone around the east area, and also a submarine volcano like as Teishi Sea Hill in 相模湾. Such a complicated origin makes this area one of Japanese typical earthquake hotspots caused by volcanoes. Many shallow earthquakes (1-20km) are observed as earthquake swarms in this area. Especially, there was a series of the earthquake swarms between 1978-1998. In my opinion, this swarm activity was induced by M7.9 Great Kanto Earthquake in 1923. Though the direct trigger of the swarms was M6.9 of 10km in 1974 in 相模湾, the M6.9 was induced by the M7.9. I think the below graph shows the mechanism of the stress transfer of earthquakes from deeper area to shallower area very well.

• 1km (red)…The count is the 1st. There was a rapid increase of 1km between the count 35-69 of 1km induced by M7.9 Great Kanto Earthquake of 20km in 1923. M6.8 occurred during the rapid increase of 1km 25 days later. Furthermore, M7.3 of 1km occurred as the count of 73 the next year. After that, there was the longest silent term of 1km between 1926-1929 (count as 114-115). Then, the silent terms became very shorter again. The next rapid increase of 1km was between the count 147-484 in 1930. During it, another M7.3 of 1km occurred as the count of 323 in 1930. Both M7.3 in 1924/in 1930 are the greatest one of all depths. After that, the silent terms gradually became longer. These long silent terms of 1km were broken by M6.9 of 10km in 1974. The M6.9 induced the rapid aftershocks of 1km in 1974 also. The count of 1km was between 794-930. After that, there were several rapid increases between 1978-1988. Most of them are regarded as the series of the earthquake swarms around East offshore Izu Peninsula. The cause is guessed as some kind of volcanic activity. In fact, there was a submarine volcanic eruption of Teishi Sea Hill of East offshore Izu Peninsula in 1989. I guess the M6.9 of 10km of 相模湾 (Sagami Bay ) in 1974 pulled the trigger of the volcanic activities with a series of the earthquake swarms to fill the gap of counts between 1km/10km, and to make 10km count increase more. There were 2 major earthquake swarms both in 1989/1997. The 1km count of the former was between 1192-1607 in 1989, and the latter was between 1903-2247. The M7.3 is the greatest one of all depths.
• 10km(yellow)⋯ The count is the 2nd.  10km curve is following behind 1km curve. There was a lesser count increase of 10km than of 1km by the M7.9 in 1923, and also a lesser count increase of 10km than of 1km before and  after M7.3 of 1km in 1930. After the aftershocks of the M7.3 in 1930, the silent terms became longer and longer. There were the 2nd/1st longest silent terms between 1952-1956(count as 163-164)/1967-1974(count as 191-192). M6.9 of 10km in 1974 occurred as the end count 192 of the 1st longest silent term. The M6.9 is also the largest one of 10km. After that, the count of 10km was increased by the series of earthquake swarms similar to ones of 1km. There were some major rapid increases of 10km between 1978-1998. There were between 10km count 277-388 in 1980/561-708 in 1988/995-1097 in 1997/1108-1294 in 1998. 
• 20km(orange)⋯The count is the 3rd. There was a rapid increase of 20km in 1930. But, the silent terms became far longer than 1km/10km. There was the 2nd/3rd longest silent term of 20km between 1959-1963/1968-1972 before the M6.9 of 10km in 1974. Then, there were 3 major rapid increases of 20km between 1974-1990. The 1st one was caused by the M6.9 of 10km similar to ones of 1km/10km. The count of 20km in 1974 was between 75-95. The 20km start count 75 in 1974 is near the 1km count of 73 of the M7.3 in 1924. The 2nd one was in 1983 (count as 121-147).  The end count 147 of 20km in 1983 is the same as the start count of the rapid increase of 1km in 1930. The 3rd increase count was between 164-202 in 1987. This end count 202 in 1987 is a little bit near the count 192 of the M6.9 of 10km in 1974.  The M7.9 Great Kanto Earthquake is the greatest one of all depths.
• 30km(yellow green)⋯The count is 4th. 30km curve is following 20km curve with far longer silent terms.  The largest one of 30km is M5.9 in 1923.
• 40km(green)⋯The count is 5th. The latest one was in 1970. The largest one of 40km is M5.4 in 1931.
• others⋯omitted.

MD-T chart in 静岡県伊豆・東部地方

MD-T chart in 静岡県伊豆・東部地方 (Izu&Eastern region, Shizuoka Pref.) 

MD chart in 静岡県伊豆・東部地方

MD chart  in 静岡県伊豆・東部地方(Izu&Eastern region, Shizuoka Pref.) 

 note : M't Fuji, Teishi Sea Hill, M't Miyake are volcanoes. 

Dragon chart in 静岡県伊豆・東部地方

Dragon chart in 静岡県伊豆・東部地方(Izu&Eastern region, Shizuoka Pref.)  is as below,

Sum of Magnitude per 1day in 静岡県伊豆・東部地方

Sum of Magnitude per 1day in 静岡県伊豆・東部地方(Izu&Eastern region, Shizuoka Pref.)

note : Horizontal axis isn't linear.

 

Distribution of Magnitude in 静岡県伊豆・東部地方

Distribution of Magnitude in 静岡県伊豆・東部地方(Izu&Eastern region, Shizuoka Pref.)  is as below,

Distribution of Depth in 静岡県伊豆・東部地方

Distribution of Depth in 静岡県伊豆・東部地方(Izu&Eastern region, Shizuoka Pref.) 

Area map of 静岡県伊豆・東部地方

Area map of 静岡県伊豆・東部地方(Izu&Eastern region, Shizuoka Pref.) is defined for epicenter's analysis as below,

Counts of occurrence per depth in 岐阜県美濃地方

Counts of occurrence per depth in 岐阜県美濃地方 (Hida region, Gifu Pref.) is shown as below graph,

The 10km/ 1km curves saw accelerated growth following major earthquakes, with the 10km curve overtaking the 1km curve after the M6.8 in 1984. While 20km/40km curves generally followed both 10km/ 1km curves, they experienced a period of being closely intertwined between 1981 and 1989 following an M6.6 event. 

• 10km (yellow)…The count is the 1st. There were 3 major rapid increases of 10km. The 1st rapid increase was between count 39-43 of 10km by M5.5 of 1km in 1948. The 2nd one was between count 131-149 of 10km by M6.6 of 1km in 1969. The 3rd one was between 188-206 of 10km a by M6.8 of 1km in 1984. After the 3rd one,  10km curve overtook 1km curve. Before and after the overtaking,  the increase of 10km count accelerated more. The largest one of 10km is M6.3 of 10km in 1934.
• 1km (red)…The count is the 2nd. There were 3  major rapid increases of 1km count since 1945. The 1st rapid increase was between count 146-151 of 1km by M5.5 of 1km in 1945 by M6.8 of 10km in 愛知県（Aichi Pref.）. The 2nd one was between count 249-270 of 1km in 1961 by M7.0 of 10km in 石川県加賀地方（Ishikawa Pref.). The 3rd one was count between 332-350 of 1km by M6.6 of 1km in 1969. After that, there was the longest silent term between 1986-2004 (count 391-392). 2 years later, M6.8 of 1km occurred in 1984 as the greatest one of all depths. Durinng the longest term of 1km, 1km curve was overtaken by 10km curve. Then, the count increase of 1km became slower. 
• 40km(green)⋯The count is the 3rd. 40km curve is following behind 10km curve. The count of 40km increased step by step gradually. The ranking of the longest silent terms are as follows (chronological order). The 2nd one was between 1920-1925. The 3rd one was between 1946-1950. The 1st one was between 1973-1981(as count 51-52). Then, the slope of 40km curve became steeper. The largest one of 40km is M5.6 in 1925.   
• 20km(orange)⋯The count is the 4th. 20km curve was following behind 40km curve except in 1931/1981-1989. 20km curve overtook 40km curve only once in 1931. Then, 20km curve was delayed from 40km curve again for a long time. After the rapid increase of 20km by M6.6 of 1km in 1969, both 20km/40km curves were closely intertwined temporarily between 1981-1989. In the rapid increase of 20km, the count was between 31-41. The end count 41 of 20km was near to the end count 43 of the 1st major rapid increase of 10km. After the end of 20km,  20km curve became close to 40km curve between 1981-1989. The largest one of 20km is M5.1 in 1966. 
• 50km(light blue)⋯The count is the 5th.  50km curve was following behind both 40km/20km curves. The largest one of 50km is M5.3 in 1975. 
• 30km(yellow green)⋯The count is the 6th. Both 30km/20km curves were closely intertwined until around 1960. Then, there was the longest silent term between 1964-2000. Since 2000, there have been no more occurrences. It means the latest silent term is extending for 25 years. The largest one of 30km is M5.5 in 1939. 
• 60km(blue)⋯The count is 7th. 60km curve is following behind 50km curve. The largest one of 60km is M5.3 in 1975. 
• others⋯ As remarkable ones of others, there were M6.6 of 250km in 1931/M6.0 of 260km in 1954.

MD-T chart in 岐阜県美濃地方

MD-T chart in 岐阜県美濃地方 (Mino region, Gifu Pref.) 

MD chart in 岐阜県美濃地方

MD chart  in 岐阜県美濃地方 (Mino region, Gifu Pref.) 

note: M't Ontake is a volcano.

Dragon chart in 岐阜県美濃地方

Dragon chart in 岐阜県美濃地方 (Mino region, Gifu Pref.)   is as below,

Sum of Magnitude per 1day in 岐阜県美濃地方

Sum of Magnitude per 1day in 岐阜県美濃地方 (Mino region, Gifu Pref.) 

note : Horizontal axis isn't linear.

Distribution of Magnitude in 岐阜県美濃地方

Distribution of Magnitude in 岐阜県美濃地方 (Mino region, Gifu Pref.)   is as below,

Distribution of Depth in 岐阜県美濃地方

Distribution of Depth in 岐阜県美濃地方 (Mino region, Gifu Pref.) 

Area map of 岐阜県美濃地方

Area map of 岐阜県美濃地方 (Mino region, Gifu Pref.) is defined for epicenter's analysis as below,

Counts of occurrence per depth in 岐阜県飛騨地方

Counts of occurrence per depth in 岐阜県飛騨地方 (Hida region, Gifu Pref.) is shown as below graph,

The count of 10km is the 1st, and it is increasing steadily still now. As the greatest one of all depths, M6.8 of 1km occurred in 1984. These graphs graph behaviors are similar to the ones in  長野県南部  (Southern Nagano Pref.) because of the overlapping area. The most difference is less counts of 30km-50km than ones in  長野県南部  (Southern Nagano Pref.) 

• 10km (yellow)…The count is the 1st. There were 3 major rapid increases of 10km count after the longest silent term between 1919-1925. The 1st rapid increase was by M6.6 of 1km in 1969. The 2nd one was by M6.8 of 1km in 1984. The 3rd one was a shallow earthquake swarm in 1998. After the 3rd one, 10km curve overtook 1km curve. And the count of 1km is increasing with the steep slope. The largest one of 10km is M6.2 of 10km induced by the M6.8 of 1km in 1984.
• 1km (red)…The count is the 2nd. As similar to 10km curve, there were 2 major rapid increases of 1km count in 1969/1998. But, the silent terms of 1km became longer and longer after 1969. The longest one of 1km was between 1986-1993.  After the longest one of 1km, 1km curve was overtaken by 10km curve. Even though the M6.8 of 1km in 1984 was the greatest one of all depths, there was almost no aftershock of 1km againt the many ones of 10km.  
• 20km(orange)⋯The count is the 3rd. There was a rapid increase between count 14-28 of 20km in 1969 induced by the M6.6 of 1km on the same day. After the M6.6 of 1km, the silent terms of 20km became longer rapidly.  The longest silent term of 20km is between 1988-2011.  The end count 28 of the rapid increase of 10km is near to the end count 26 of the 3rd longest silent term of 1km between 1946-1951 (count 25-26). The largest one of 20km is M4.9 in 1969.  
•  others⋯ As remarkable ones of others, there were M6.6 of 250km in 1931/M6.0 of 260km in 1954.

MD-T chart in 岐阜県飛騨地方

MD-T chart in 岐阜県飛騨地方 (Hida region, Gifu Pref.)