Data / Energy Guide
Simple guide to understand the seismic energy value shown in Quakrs.
The energy value is an estimate of how much seismic energy was released by all earthquakes in the selected time window (usually last 24h).
Event count alone can be misleading. Many small quakes may look busy but release less energy than one stronger quake. Energy helps you read the real intensity of activity.
For each event with a valid magnitude, Quakrs applies a standard seismology relation: log10(E) = 1.5M + 4.8 (E in joules). Then all events are summed.
We convert joules into larger units for readability: GJ (billion J), TJ (trillion J), PJ (quadrillion J). Example: if you see 24.24 TJ, it means about 24.24 trillion joules.
This is an operational estimate, not a laboratory measurement. It depends on catalog completeness, event magnitude revisions, and provider differences. Use it as a robust indicator, not an exact physical audit.
High event count + low energy: mostly micro to moderate activity. Lower count + high energy: one or few stronger events dominate. Best practice: read energy together with max magnitude and baseline delta.
Return to the Energy page to see the value in context with baseline and trend charts.
Open Data / Energy