MD-T chart in 長野県北部

MD-T chart in 長野県北部（Northern Nagano Pref.）

note : Most of the data of "Matsushiro Earthquake Swarm" since 1965 are "unknown" data with no magnitude data. So, most of them are no plot.  Even so, there were very few data including "unknowns" before the swarm as only 1-4 times per a year between 1959- 1964 in fact.