Pacific Rim · Real USGS data

See the Ring of Fire as it moves

Live earthquake maps from the USGS, a Holocene volcano catalog from the Smithsonian GVP, and a one-year snapshot of global seismicity — with an auditable Pacific Rim corridor definition.

Live Quakes Volcanoes Alerts digest Scenarios What-if Desk Questions Learn

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Yearly snapshot

USGS FDSN catalog · 2025-09-13 → 2026-09-12 UTC · from SUMMARY.json

28,374

M≥2.5

16,268

M≥4

M≥7+

M7.8

Strongest

80.6%

RoF share of M≥4

13,117

RoF M≥4

Strongest in window: M7.8 — 64 km NNW of Ende, Indonesia (2026-08-14 21:58:21 UTC). RoF share = 13,117 / 16,268 M≥4 events inside documented corridor rectangles.

Last significant quakes

Full alerts digest →

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Catalog charts

From on-disk USGS CSV summary

Monthly counts of M≥2.5 earthquakes over the summary window — Monthly M≥2.5 (partial months marked in source charts)

Monthly counts of M≥4 earthquakes over the summary window — Monthly M≥4

Magnitude histogram for M≥4 earthquakes — M≥4 events by magnitude band, counted from the summary totals (partial months are lighter on the monthly charts)

Guides, regions, and tools

All guides →

Faults and trenches

Cascadia, San Andreas, the Japan Trench, Chile, Alaska-Aleutian, and New Madrid.

Volcano profiles

Major arc volcanoes from the Smithsonian snapshot, plus Hawaiʻi as the hotspot contrast.

Tsunami alerts

What warning, advisory, watch, and information statement mean.

Magnitude and energy

The USGS 10× amplitude and about 32× energy rule, applied to two numbers.

Largest since 1900

The USGS list of 20, linked to the region page for each Pacific event.

ShakeAlert

Early warning after a quake has started. Not a prediction.

FAQ

Straight answers, including the one about predictions.

Glossary

Short definitions linked to the longer pages.