Define two comparable queries
Enter the coordinates of both centers and turn on comparison. Use one radius, one minimum magnitude and the same UTC date window for both. This avoids accidentally comparing a small city circle against a much larger region or a short period against a decade.
The equal filters describe the query, not the geology. Search circles may overlap; an event in both circles belongs in both results. The downloadable query record preserves the centers, radius and period so another reader can reproduce the comparison.
Read the catalog before the count
Check magnitude type, event type, depth and review status in the CSV. A numerical magnitude does not mean every event was estimated with the same method. The source link lets you inspect an individual event in the responsible catalog.
Detection networks and historical records vary. A region with fewer catalog entries is not automatically less hazardous, and a recent cluster does not provide a reliable prediction by itself. This tool does not calculate exposure, local soil effects or building performance.
Keep conclusions within the data
The count and maximum describe the bounded result returned by the current query. Record the retrieval time because catalog estimates can be revised. When sharing a chart, include the date window, threshold and source rather than presenting a raw count alone.
For education, a useful question is how the observed catalog changes when you raise the magnitude threshold. That can illustrate sensitivity to query choices without claiming to model future earthquakes. Use responsible authorities for current safety information.