Counts of occurrence per depth in 石川県加賀地方

Counts of occurrence per depth in 石川県加賀地方（Kaga region, Ishikawa Pref.）is shown as below graph,  

10km curve was following behind 1km curve.  At M7.0 of 10km in 1948, the count of 10km reached count of 15 near the 1km's count 14 just before the 2nd longest silent term of 1km between 1952-1961. Then, 10km curve had the 1st longest silent term between 1961-1978. There was another rapid increase with gentle slope and the 3rd longest silent term between 1986-1995. The count of 10km became 24 in 1995. This count of 10km is near the count of 1km as 20 at M7.1 in 1948. Furthermore, The 10km's count of becoming the silent term over 3 months after the rapid increase in 2002 was 54. And 1km's count of becoming the silent term over 3 months after the rapid increase with gentle slope since 1961 was 51. These counts are alsp near.

 

• 10km (yellow)…The count is the 1st. 10km curve was following behind 1km curve before M9.0 Great East Japan Earthquake in 2011.  There was the steep slope of 10km since Apr/2013. It may be induced by M6.3 of 20km in Awaji Island just before it. 10km curve became fitting along with 1km curve before the M9.0. Then, there was the rapid increase of 10km by the M9.0 in 2011, and 10km curve overtook the 1km curve. The largest one of 10km is M7.0 in 1961.
• 1km (red)…The count is the 2nd. Before the M9.0, the rank was the 1st. There was the rapid increase by M7.1 of 1km named as "Fukui Earthquake" in 1948. There was the another increase with the speep slope by M7.0 of 10km in 1961 after the 2nd longest silent term between 1952-1961. By these increases, the count of 1km became 51 times just before the 1st longest silent term of 1km. The count of 1km is the almost same as the count of 10km becoming the silent term over 3 months after the rapid increase in 2002. The silent terms of 1km is becoming shorter gradually with gentle slope since the 1st one. During these long silent terms, 1km curve was overtaken by 10km curve with the rapid increase just after the M9.0 in 2011.  The M7.1 Fukui Earthquake in 1948 is the greatest one of all depths.
• 20km(orange)⋯The count is the 3rd. 20km curve was following behind 10km curve. There was the longest silent term between 1996-2003. The latest occurrence was in 2021. The largest one of 20km is M4.3 in 1930.
• 30km(yellow green)⋯The count is the 4th. But, it is only one occurrence.
• others⋯There is no occurrence in other depths.