While hydraulic fracturing operations frequently trigger microseismic events and occasional earthquakes due to fluid injection and fault activation, the vast majority of these induced seismic events are very small in magnitude, making the frequency of significant, felt earthquakes relatively uncommon depending on local geological conditions.
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The retrieved literature shows widespread consensus that hydraulic fracturing operations regularly induce microseismic activity and sometimes larger earthquakes via pore pressure changes and fault activation. However, studies disagree on whether this constitutes frequent hazardous earthquakes or mostly minor, negligible tremors. Therefore, the claim is best classified as CONTESTED regarding the frequency and significance of the resulting earthquakes.