Counts of occurrence per depth in 福井県嶺南地方

Counts of occurrence per depth in 福井県嶺南地方（Reinan region, Fukui Pref.）is shown as below graph,  

Some of the 1km's count of the accelerations may be linked with 10km/20km's one as shown the blue line in the below graph. 10km curve overtook 1km curve with the steady increases during the longest silent term of 1km.  The largest ones were occurred in deep area between 360-370km as M5.9-M6.1.

• 10km (yellow)…The count is the 1st. The count has been increasing steadily. 10km curve overtook 1km curve in 2011. There were some combinations of long silent term and accelerated terms. These counts of both 10km and 1km are seemed to be linked as showed as the blue horizontal lines in the graph above. The acceleration of 10km in 2011 was occurred around the end of the longest silent term of 1km in 2011. The largest one of 10km is M5.2 in 1963. After the M6.3, the silent terms of 1km became longer suddenly.
• 1km(red)⋯The count is the 2nd. There was the rapid increase by M7.3 of 20km of Northern Kyoto outside of this area in 1927. The start count of 1km was linked with 20km's acceleration of the count in 1960. The end count of 1km was linked with 10km's acceleration of the count in 1983. The occurrence of 1km in 2011 is the latest one as the end of the longest silent term of 1km between 1991-2011. The largest one of 1km is M5.3 in 1937.
• 20km(orange)⋯The count is the 3rd. There was the longest silent term of 20km between 1973-2002. After it, there was the acceleration of 20km between 2007-2011. By this acceleration, the count became closer with the end count of the rapid increase of 1km in 1927.  There might be the acceleration of 20km after the 20km count becoming more than the start count of 10km's acceleration in 1960. The largest one of 20km is M4.7 in 1944.
• 30km(yellow green)⋯The count is the 3rd. But, it's only 4 times. The largest one of 30km is M4.9 in 1931.
• 40km(green)⋯The count is only 2 times. The largest one of 40km is M2.9 in 2025.
• others⋯350km/360km/370km's occurrence was each 2 or 3 times. But, each the largest one is  M5.4/M5.9/M6.1. All of them are larger than one's of othes (1km-40km). The largest one of all depths is M6.1 of 370km.