official data
Light pin: M5.3 off northern Peru — felt, no tsunami flag
USGS records a reviewed magnitude 5.3 earthquake early September 10 about 126 km west-southwest of Alianza Cristiana, Peru — a light Desk pin below the usual ~M6.5 interrupt threshold, with tsunami flag off.
Key facts
- Event
- us7000tg8v · M5.3 · reviewed
- Origin
- 2026-09-10 06:42:40.393 UTC (02:42 AM ET)
- Epicenter
- 126 km WSW of Alianza Cristiana, Peru · −3.873°, −77.503° · depth 10.0 km
- Felt / PAGER
- 1 felt report · CDI 3.1 · MMI none listed · alert none · tsunami flag 0 · sig 432
- Awareness only
- Same-morning USGS M5.0 us7000tg98 — 45 km SSE of Quepos, Costa Rica · 08:26:53 UTC · not a separate note
- Live
- DYFI / updates after this GeoJSON stamp → live USGS HUD
Desk’s interrupt line still sits near M6.5. An M5.3 offshore northern Peru is a light pin — enough to mark the board, not enough to clear the deck.
Desk reading of USGS GeoJSON
Note
USGS stamped an M5.3 west-southwest of Alianza Cristiana, Peru, at 06:42 UTC on September 10 — depth 10 km, tsunami flag off, one felt report in the early feed. That is a light pin on a doom board that saves the siren for bigger meters. A same-morning M5.0 near Quepos, Costa Rica, sits in the same awareness row. Neither replaces a real interrupt event.
Attribution: U.S. Geological Survey earthquake event page / FDSN GeoJSON for us7000tg8v (and awareness us7000tg98).
Why it matters
Tsunami flag off keeps it in the ordinary seismicity column. Pair awareness with the same-morning Costa Rica M5.0 without promoting either to lead.
Sources
Official data. Live values go to the HUD / source product.