About role of Earthquakes before considered explosiontype events(maybe a myth???)

Nevadosdechillán event quite terrifying by image;

http://www.earth-of-fire.com/2019/10/activite-du-nevados-de-chillan-de-la-fournaise-et-du-sakurajima.html

Thus,I realised a near period analysis;

You see that Green Circle boundary is over NevadosdeChillán!!!

And,2xM4.0 environment event into ~ circle boundary are subject!!!

You know that express some chapters as  triggering of earthquakes before  interesting explosion activities.So,you understand... I mean that required material to some mechanism explanations for considered volcanism events thus is understanding

I will wait thus to your apreciated replies...

By the way,I think that first ~M4.0 magnitude(for boundary location) has to important a role  for considered structure of volcanism

Other day,I see a event information;

Thus,I think that region is quite powerful laboratory position  for solution of events based on Volcanism