SeismoTotal · USGS
How it works
Live map
Your browser loads USGS GeoJSON feeds and refreshes the map every five minutes. Open an event to check its time, depth and magnitude in the original record: the catalogue can be revised later.
Historical catalogue
The interval includes both complete UTC dates. The total is queried separately; the chart and highlighted events use at most the 2,000 most recent events. A capped chart does not describe the entire period's monthly trend.
Statistical model
The observed rate is λ=N/H: recorded events divided by observation years. P(≥1)=1−exp(−λT) assumes a constant rate and independent events. Historical blocks do not share boundary instants.
Interpretation limits
Aftershocks and detection changes can violate these assumptions. Radius measures distance to the epicentre, not shaking intensity at your location. Sample size does not measure accuracy or validate the model. Use official sources for hazard, construction and emergencies.
Saved USGS counts
2001-09-24 → 2026-09-23 UTC · M ≥ 4.5 · H = 25 · λ = N/H
| Source | Radius | Events | λ | Model probability · T=1 | Model probability · T=10 |
|---|---|---|---|---|---|
| Córdoba37.8846, -4.7794 | 100 km | 0 | 0.00 | — | — |
| Tokyo35.6762, 139.6503 | 100 km | 517 | 20.68 | >99.9 % | >99.9 % |
| Tokyo35.6762, 139.6503 | 50 km | 186 | 7.44 | >99.9 % | >99.9 % |
| Quito-0.1807, -78.4678 | 100 km | 33 | 1.32 | 73.29 % | >99.9 % |
The table calculates 1- and 10-year horizons with the application's own engine. Values above 99.9% remain conditional model outputs, not certainties. Separate teaching example: N=2, H=25, T=10 gives λ=0.08 and P=55.07%. Live catalogue counts may change after revisions.