I know nothing about this topic, but standard diagnostic thinking would suggest that you need to check you app results against other sources to see if they show similar results. For example, did ever quake over 5.x that registered here, also show alert on your app?

For example: Yesterday. Did you get alert on this? Magnitude: 5.1 Time (UTC): 08/29/2021 19:29 UTC M 5.2 - 9 km NNE of Pinalejo, Honduras

I know nothing about this topic, but standard diagnostic thinking would suggest that you need to check you app results against other sources to see if they show similar results. For example, did ever quake over 5.x that registered here, also show alert on your app?