Small earthquakes are not generally a precursor to larger ones, although sometimes they can be. Here's a decent quora answer to the question from a geologist: h

Small earthquakes are not generally a precursor to larger ones, although sometimes they can be. Here's a decent quora answer to the question from a geologist: https://www.quora.com/Is-it-true-that-little-earthquakes-are-precursors-to-big-ones https://www.quora.com/Is-it-true-that-little-earthquakes-are... Summary: small earthquakes incease the risk of larger ones by 1-5%, but large earthquakes are fairly rare so an increased likelihood of 1-5% isn't something sensible to take action on.